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Navegação por Revista "Physical Review C"
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LA FAUCI, L.; SPATAFORA, A.; CAPPUZZELLO, F.; AGODI, C.; CARBONE, D.; CAVALLARO, M.; LUBIAN, J.; ACOSTA, L.; AMADOR-VALENZUELA, P.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; CUTULI, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; GUAZZELLI, M.A.; HACISALIHOGLU, A.; IAZZI, F.; LINARES, R.; MA, J.; MEDINA, N.H.; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RIES, P.C.; RUSSO, G.; SGOUROS, O.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; WANG, J.; YANG, Y.; YILDIRIN, A.; ZAGATTO, V.A.B..
18O+76Se elastic and inelastic scattering at 275 MeV.
Physical Review C,
v. 104,
n. 5,
p. 054610-1 - 054610-9,
2021.
DOI:
10.1103/PhysRevC.104.054610
Abstract:
Background: An accurate description of the initial and final state interactions in the 18O+76Se collision is
demanded by the NUMEN project. The study of single and double charge exchange nuclear reactions is the
main purpose for NUMEN, since these can be used as tools to provide experimentally driven information about
nuclear matrix elements of interest in the context of neutrinoless double-β decay. To date, the details of the
optical potentials and nuclear response to isospin operators for many of the projectile-target systems proposed
for the NUMEN double charge exchange studies are poorly known. The 18O+76Se case, here under study, is
particularly relevant due to its connection with the 76Ge neutrinoless double-β decay. Purpose: In this work the authors want to characterize the initial-state interaction for the 18O+76Se reactions
at 275 MeV incident energy determining the optical potential and evaluating the effect of couplings with the
inelastic scattering on the elastic channel. Methods: The angular distributions of differential cross section were measured in the angular region between 4◦
and 22◦ in the center-of-mass reference frame. The cross sections were compared with theoretical calculations,
that adopt different optical potentials. Coupling effects on the elastic channel were determined into the coupled
channels formalism. Results: The excitation energy spectrum of the colliding nuclei and the cross section angular distributions were
measured with satisfactory energy resolution. The elastic scattering cross section is not well reproduced in the
full angular range explored when the optical model approach is adopted. A good agreement is found using coupled channel calculations. The initial state interaction for the 18O+76Se nuclear reactions at 275 MeV is
determined. Conclusions: Coupled channels effects are crucial to obtain a good description of the measured elastic and
inelastic channels cross sections, even at large transferred momenta where the optical model approach fails in
reproducing the experimental data. The role of channel coupling could be relevant also in the analysis of other
open reaction channels in the same collision and should be accounted for in double charge exchange analyses as
well.
Palavras-Chave:
oxygen 18;
selenium 76;
elastic scattering;
inelastic scattering;
nuclear reactions
LA FAUCI, L.; SPATAFORA, A.; CAPPUZZELLO, F.; AGODI, C.; CARBONE, D.; CAVALLARO, M.; LUBIAN, J.; ACOSTA, L.; AMADOR-VALENZUELA, P.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; CUTULI, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; GUAZZELLI, M.A.; HACISALIHOGLU, A.; IAZZI, F.; LINARES, R.; MA, J.; MEDINA, N.H.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RIES, P.C.; RUSSO, G.; SGOUROS, O.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; WANG, J.; YANG, Y.; YILDIRIN, A.; ZAGATTO, V.A.B.
18O+76Se elastic and inelastic scattering at 275 MeV.
Physical Review C,
v. 104,
n. 5,
p. 054610-1 - 054610-9,
2021.
DOI:
10.1103/PhysRevC.104.054610.
Disponível em: http://repositorio.ipen.br/handle/123456789/32798. Acesso em: $DATA.
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CALABRESE, S.; CAVALLARO, M.; CARBONE, D.; CAPPUZZELLO, F.; AGODI, C.; BURRELLO, S.; DE GREGORIO, G.; FERREIRA, J.L.; GARGANO, A.; SGOUROS, O.; ACOSTA, L.; AMADOR-VALENZUELA, P.; BELLONE, J.I.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; COLONNA, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; GUAZZELLI, M.A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LAY, J.A.; LINARES, R.; LUBIAN, J.; MEDINA, N.H.; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; SPATAFORA, A.; TORRESI, D.; TUDISCO, S.; YILDIRIN, A.; ZAGATTO, V.A.B..
18O-induced single-nucleon transfer reactions on 40Ca at 15.3A MeV within a multichannel analysis.
Physical Review C,
v. 104,
n. 6,
p. 064609-1 - 064609-12,
2021.
DOI:
10.1103/PhysRevC.104.064609
Abstract:
Background: Nucleon transfer reactions are selective tools for nuclear physics investigations. The theoretical
and computational limits affecting in the past their data analysis could be nowadays surmounted thanks to the
advent of methods with refined approximations and constraints, even when heavy-ion collisions are considered. Purpose: Modern microscopic calculations of heavy-ion-induced transfer reactions combined with precise
experimental data offer the chance for accurately testing different reaction models as well as the nuclear structure
description of the involved nuclear states. Method: Single proton and neutron transfer reactions were measured with theMAGNEX magnetic spectrometer
for the 18O+40Ca system at 15.3A MeV. Excitation energy spectra and angular differential cross section
distributions were extracted. The experimental results are compared with theoretical calculations performed in
distorted wave and coupled channel Born approximation. The use of a coupled channel equivalent polarization
potential to effectively describe the coupling effects affecting the initial state interaction is also considered.
Spectroscopic amplitudes derived from a large-scale shell model with appropriate interactions adapted for the
involved nuclei are employed. Results: Our theoretical calculations are in good agreement with experimental data, without the need for any
scaling factor, validating the adopted reaction and nuclear structure parameters. Moreover, under the present experimental conditions, a weak dependence of the obtained results on the choice of the reaction models was
observed. Conclusions: The good agreement between experimental and theoretical results validates the reliability of
the parameter sets entering the calculations. They are extracted from or tested in complementary analyses of
other reaction channels under the same experimental conditions. Such a multichannel approach represents the
best option to pursue a solid, comprehensive, and model-independent description of the single-nucleon transfer
reactions. The successful description of the present one-nucleon transfer data is also propaedeutic to the accurate
assessment, under the same theoretical description, of higher-order transfer processes, like the sequential nucleon
transfer mechanisms which are in competition with the direct charge exchange reactions.
Palavras-Chave:
nucleon reactions;
calcium 40;
oxygen 18;
calculation methods;
born approximation;
distorted wave theory;
magnets
CALABRESE, S.; CAVALLARO, M.; CARBONE, D.; CAPPUZZELLO, F.; AGODI, C.; BURRELLO, S.; DE GREGORIO, G.; FERREIRA, J.L.; GARGANO, A.; SGOUROS, O.; ACOSTA, L.; AMADOR-VALENZUELA, P.; BELLONE, J.I.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; COLONNA, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; GUAZZELLI, M.A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LAY, J.A.; LINARES, R.; LUBIAN, J.; MEDINA, N.H.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; SPATAFORA, A.; TORRESI, D.; TUDISCO, S.; YILDIRIN, A.; ZAGATTO, V.A.B.
18O-induced single-nucleon transfer reactions on 40Ca at 15.3A MeV within a multichannel analysis.
Physical Review C,
v. 104,
n. 6,
p. 064609-1 - 064609-12,
2021.
DOI:
10.1103/PhysRevC.104.064609.
Disponível em: http://repositorio.ipen.br/handle/123456789/32799. Acesso em: $DATA.
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SPATAFORA, A.; CAPPUZZELLO, F.; CARBONE, D.; CAVALLARO, M.; LAY, J.A.; ACOSTA, L.; AGODI, C.; BONANNO, D.; BONGIOVANNI, D.; BOZTOSUN, I.; BRISCHETTO, G.A.; BURRELLO, S.; CALABRESE, S.; CALVO, D.; LOMELI, E.R.C.; CIRALDO, I.; COLONNA, M.; DELAUNAY, F.; DESHMUKH, N.; FERREIRA, J.L.; FINOCCHIARO, P.; FISICHELLA, M.; FOTI, A.; GALLO, G.; HACISALIHOGLU, A.; IAZZI, F.; LANZALONE, G.; LENSKE, H.; LINARES, R.; PRESTI, D.L.; LUBIAN, J.; MORALLES, M.
; MUOIO, A.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; REITO, S.; RUSSO, G.; SANTAGATI, G.; SGOUROS, O.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B..
20Ne + 76Ge elastic and inelastic scattering at 306 MeV.
Physical Review C,
v. 100,
n. 3,
p. 034620-1 - 034620-8,
2019.
DOI:
10.1103/PhysRevC.100.034620
Abstract:
Background: Double charge exchange (DCE) nuclear reactions have recently attracted much interest as tools to
provide experimentally driven information about nuclear matrix elements of interest in the context of neutrinoless
double-β decay. In this framework, a good description of the reaction mechanism and a complete knowledge of
the initial and final-state interactions are mandatory. Presently, not enough is known about the details of the
optical potentials and nuclear response to isospin operators for many of the projectile-target systems proposed
for future DCE studies. Among these, the 20Ne + 76Ge DCE reaction is particularly relevant due to its connection
with 76Ge double-β decay.
Purpose: We intend to characterize the initial-state interaction for the 20Ne + 76Ge reactions at 306 MeV
bombarding energy and determine the optical potential and the role of the couplings between elastic channel
and inelastic transitions to the first low-lying excited states.
Methods: We determine the experimental elastic and inelastic scattering cross-section angular distributions,
compare the theoretical predictions by adopting different models of optical potentials with the experimental data,
and evaluate the coupling effect through the comparison of the distorted-wave Born approximation calculations
with the coupled channels ones.
Results: Optical models fail to describe the elastic angular distribution above the grazing angle (≈9.4◦). A
correction in the geometry to effectively account for deformation of the involved nuclear systems improves the
agreement up to about 14◦. Coupled channels effects are crucial to obtain good agreement at large angles in the
elastic scattering cross section.
Conclusions: The analysis of elastic and inelastic scattering data turned out to be a powerful tool to explore the
initial and final-state interactions in heavy-ion nuclear reactions at high transferred momenta.
Palavras-Chave:
neon 20;
germanium 76;
isotopes;
charge-exchange reactions;
elastic scattering;
inelastic scattering;
decay;
scattering amplitudes
SPATAFORA, A.; CAPPUZZELLO, F.; CARBONE, D.; CAVALLARO, M.; LAY, J.A.; ACOSTA, L.; AGODI, C.; BONANNO, D.; BONGIOVANNI, D.; BOZTOSUN, I.; BRISCHETTO, G.A.; BURRELLO, S.; CALABRESE, S.; CALVO, D.; LOMELI, E.R.C.; CIRALDO, I.; COLONNA, M.; DELAUNAY, F.; DESHMUKH, N.; FERREIRA, J.L.; FINOCCHIARO, P.; FISICHELLA, M.; FOTI, A.; GALLO, G.; HACISALIHOGLU, A.; IAZZI, F.; LANZALONE, G.; LENSKE, H.; LINARES, R.; PRESTI, D.L.; LUBIAN, J.; MORALLES, M.; MUOIO, A.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; REITO, S.; RUSSO, G.; SANTAGATI, G.; SGOUROS, O.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B.
20Ne + 76Ge elastic and inelastic scattering at 306 MeV.
Physical Review C,
v. 100,
n. 3,
p. 034620-1 - 034620-8,
2019.
DOI:
10.1103/PhysRevC.100.034620.
Disponível em: http://repositorio.ipen.br/handle/123456789/30457. Acesso em: $DATA.
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CIRALDO, I.; CAPPUZZELLO, F.; CAVALLARO, M.; CARBONE, D.; BURRELLO, S.; SPATAFORA, A.; GARGANO, A.; DE GREGORIO, G.; MAGANA VSEVOLODOVNA, R.I.; ACOSTA, L.; AGODI, C.; AMADOR-VALENZUELA, P.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; COLONNA, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LINARES, R.; MEDINA, N.H.; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SANTOPINTO, E.; SGOUROS, O.; GUAZZELLI, M.A.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B..
Analysis of the one-neutron transfer reaction in 18O+76Se collisions at 275 MeV.
Physical Review C,
v. 105,
n. 4,
p. 044607-1 - 044607-15,
2022.
DOI:
10.1103/PhysRevC.105.044607
Abstract:
Background: Heavy-ion one-nucleon transfer reactions are promising tools to investigate single-particle configurations
in nuclear states with and without the excitation of the core degrees of freedom. A careful determination
of the spectroscopic amplitudes of these configurations is essential for the accurate study of other direct reactions
as well as β decays. In nucleon transfer reactions core excitations, for both target and projectile systems, are best
approached via coupled-channels reaction schemes. Despite being notoriously demanding in terms of computing
resources, coupled-channels analyses are progressively becoming more affordable even within model spaces
large enough for tackling medium mass nuclei. In this context, the 76Se(18O, 17O) 77Se reaction, here under
study, gives a quantitative access to the relevant single-particle orbitals and core polarization configurations built
on 76Se. This is particularly relevant, since it provides data-driven information to constrain nuclear structure
models for 76Se, which is the daughter nucleus in the 76Ge ββ decay. This reaction is one of the systems studied
in the frame of the Nuclear Matrix Elements for Neutrinoless double beta decay project.
Purpose: We want to analyze transitions to low-lying excited states of the residual and ejectile nuclei in
the 76Se(18O, 17O) 77Se one-neutron stripping reaction at 275-MeV incident energy and determine the role of
single-particle and core excitation in the description of the measured cross sections. In addition, we explore the
sensitivity of the calculated cross section to different nuclear structure models.
Methods: The excitation energy spectrum and the differential cross-section angular distributions are measured
using the MAGNEX large acceptance magnetic spectrometer for the detection of the ejectiles and the missing mass technique for the reconstruction of the reaction kinematics. The data are compared with calculations based
on distorted-wave Born approximation, coupled-channels Born approximation, and coupled reaction channels
adopting spectroscopic amplitudes for the projectile and target overlaps derived by large-scale shell-model
calculations and interacting boson-fermion model.
Results: Peaks in the energy spectra corresponding to groups of unresolved transitions to 77Se and 17O are
identified. The experimental cross sections are extracted and compared to theoretical calculations. A remarkable
agreement is found, without using any scaling factors, demonstrating that the adopted models for nuclear
structure and reaction take into account the relevant aspects of the studied processes. The main transitions which
contribute to the cross section of each peak are identified.
Conclusions: The coupling with the inelastic channels feeding states in entrance and exit partitions is important
in the one-neutron transfer reaction and should be accounted for in future analyses of other direct reactions such
as single and double charge exchange processes involving 76Se isotope. The description of 77Se indicates the
need of a large model space, in the view of an accurate description of the low-lying states, a feature that should
be likely accounted even for ββ-decay studies of 76Ge.
Palavras-Chave:
nuclear matrix;
neutron transfer;
double beta decay;
oxygen 18;
selenium 76
CIRALDO, I.; CAPPUZZELLO, F.; CAVALLARO, M.; CARBONE, D.; BURRELLO, S.; SPATAFORA, A.; GARGANO, A.; DE GREGORIO, G.; MAGANA VSEVOLODOVNA, R.I.; ACOSTA, L.; AGODI, C.; AMADOR-VALENZUELA, P.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; COLONNA, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LINARES, R.; MEDINA, N.H.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SANTOPINTO, E.; SGOUROS, O.; GUAZZELLI, M.A.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B.
Analysis of the one-neutron transfer reaction in 18O+76Se collisions at 275 MeV.
Physical Review C,
v. 105,
n. 4,
p. 044607-1 - 044607-15,
2022.
DOI:
10.1103/PhysRevC.105.044607.
Disponível em: http://repositorio.ipen.br/handle/123456789/33220. Acesso em: $DATA.
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CARBONE, D.; FERREIRA, J.L.; CALABRESE, S.; CAPPUZZELLO, F.; CAVALLARO, M.; HACISALIHOGLU, A.; LENSKE, H.; LUBIAN, J.; MAGAÑA VSEVOLODOVNA, R.I.; SANTOPINTO, E.; AGODI, C.; ACOSTA, L.; BONANNO, D.; BORELLO-LEWIN, T.; BOZTOSUN, I.; BRISCHETTO, G.A.; BURRELLO, S.; CALVO, D.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; COLONNA, M.; DELAUNAY, F.; DESHMUKH, N.; FINOCCHIARO, P.; FISICHELLA, M.; FOTI, A.; GALLO, G.; IAZZI, F.; LA FAUCI, L.; LANZALONE, G.; LINARES, R.; MEDINA, N.H.; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; REITO, S.; RUSSO, G.; SGOUROS, O.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; SPATAFORA, A.; TORRESI, D.; TUDISCO, S.; YILDIRIN, A.; ZAGATTO, V.A.B..
Analysis of two-nucleon transfer reactions in the 20Ne+116Cd system at 306 MeV.
Physical Review C,
v. 102,
n. 4,
p. 044606-1 - 044606-14,
2020.
DOI:
10.1103/PhysRevC.102.044606
Abstract:
Background: Heavy-ion induced two-nucleon transfer reactions are powerful tools to reveal peculiar aspects
of the atomic nucleus, such as pairing correlations, single-particle and collective degrees of freedom, and more.
Also, these processes are in competition with the direct meson exchange in the double charge exchange reactions,
which have recently attracted great interest due to their possible connection to neutrinoless double-β decay.
In this framework, the exploration of two-nucleon transfer reactions in the 20Ne+116Cd collision at energies
above the Coulomb barrier is particularly relevant since the 116Cd nucleus is a candidate for the double-β
decay.
Purpose: We want to analyze selected transitions to low-lying 0+ and 2+ states of the residual nuclei in the
116Cd(20Ne, 22Ne)114Cd two-neutron pickup and 116Cd(20Ne, 18O)118Sn two-proton stripping reactions at 306
MeV incident energy and determine the role of the couplings with inelastic transitions.
Methods: We measured the excitation energy spectra and absolute cross sections for the two reactions using
the MAGNEX large acceptance magnetic spectrometer to detect the ejectiles. We performed direct coupled
reaction channels and sequential distorted wave Born approximation calculations using the double folding São
Paulo potential to model the initial and final state interactions. The spectroscopic amplitudes for two- and singleparticle
transitions were derived by different nuclear structure approaches: microscopic large-scale shell model,
interacting boson model-2 and quasiparticle random phase approximation.
Results: The calculations are able to reproduce the experimental cross sections for both two-neutron and twoproton
transfer reactions. The role of couplings with the inelastic channels are found to be important in the
two-proton transfer case. A competition between the direct and the sequential process is found in the reaction mechanism. For the two-proton transfer case, the inclusion of the 1g7/2 and 2d5/2 orbitals in the model space is
crucial.
Conclusions: The approach presented here, combination of nuclear structure and reaction mechanism ingredients,
is a very promising tool for the analysis of two-neutron and two-proton transfer reactions between heavy
nuclei.
Palavras-Chave:
two-nucleon transfer reactions;
rare gases;
multi-nucleon transfer reactions;
neon 20;
cadmium 116
CARBONE, D.; FERREIRA, J.L.; CALABRESE, S.; CAPPUZZELLO, F.; CAVALLARO, M.; HACISALIHOGLU, A.; LENSKE, H.; LUBIAN, J.; MAGAÑA VSEVOLODOVNA, R.I.; SANTOPINTO, E.; AGODI, C.; ACOSTA, L.; BONANNO, D.; BORELLO-LEWIN, T.; BOZTOSUN, I.; BRISCHETTO, G.A.; BURRELLO, S.; CALVO, D.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; COLONNA, M.; DELAUNAY, F.; DESHMUKH, N.; FINOCCHIARO, P.; FISICHELLA, M.; FOTI, A.; GALLO, G.; IAZZI, F.; LA FAUCI, L.; LANZALONE, G.; LINARES, R.; MEDINA, N.H.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; REITO, S.; RUSSO, G.; SGOUROS, O.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; SPATAFORA, A.; TORRESI, D.; TUDISCO, S.; YILDIRIN, A.; ZAGATTO, V.A.B.
Analysis of two-nucleon transfer reactions in the 20Ne+116Cd system at 306 MeV.
Physical Review C,
v. 102,
n. 4,
p. 044606-1 - 044606-14,
2020.
DOI:
10.1103/PhysRevC.102.044606.
Disponível em: http://200.136.52.105/handle/123456789/31655. Acesso em: $DATA.
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ZAGATTO, V.A.B.; LUBIAN, J.; GASQUES, L.R.; ALVAREZ, M.A.G.; CHAMON, L.C.; OLIVEIRA, J.R.B.; ALCANTARA-NUNEZ, J.A.; MEDINA, N.H.; SCARDUELLI, V.; FREITAS, A.; PADRON, I.; ROSSI JUNIOR, E.S.; SHORTO, J.M.B.
.
Elastic scattering, inelastic excitation, and neutron transfer for 7Li + 120Sn at energies around the Coulomb barrier.
Physical Review C,
v. 95,
n. 6,
p. 064614-1 - 064614-8,
2017.
DOI:
10.1103/PhysRevC.95.064614
Abstract:
Experimental angular distributions for the Li-7 + Sn-120 elastic and inelastic (projectile and target excitations) scattering, and for the neutron stripping reaction, have been obtained at E-LAB = 20, 22, 24, and 26 MeV, covering an energy range around the Coulomb barrier (V-B((LAB)) approximate to 21.4 MeV). Coupled channel and coupled reaction channel calculations were performed and both describe satisfactorily the experimental data sets. The 1/2(-) state Li-7 inelastic excitation (using a rotational model), as well as the projectile coupling to the continuum (alpha plus a tritium particle) play a fundamental role on the proper description of elastic, inelastic, and transfer channels. Couplings to the one-neutron stripping channel do not significantly affect the theoretical elastic scattering angular distributions. The spectroscopic amplitudes of the transfer channel were obtained through a shell model calculation. The theoretical angular distributions for the one-neutron stripping reaction agreed with the experimental data.
Palavras-Chave:
scattering;
elastic scattering;
data analysis;
lithium 7 reactions;
tin 120 target;
coulomb field
ZAGATTO, V.A.B.; LUBIAN, J.; GASQUES, L.R.; ALVAREZ, M.A.G.; CHAMON, L.C.; OLIVEIRA, J.R.B.; ALCANTARA-NUNEZ, J.A.; MEDINA, N.H.; SCARDUELLI, V.; FREITAS, A.; PADRON, I.; ROSSI JUNIOR, E.S.; SHORTO, J.M.B.
Elastic scattering, inelastic excitation, and neutron transfer for 7Li + 120Sn at energies around the Coulomb barrier.
Physical Review C,
v. 95,
n. 6,
p. 064614-1 - 064614-8,
2017.
DOI:
10.1103/PhysRevC.95.064614.
Disponível em: http://repositorio.ipen.br/handle/123456789/27896. Acesso em: $DATA.
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SANTOS, O.C.B.; LICHTENTHALER, R.; PIRES, K.C.C.; UMBELINO, U.; ZEVALLOS, E.O.N.; LARA, A.L. de; SERRA, A.S.; SCARDUELLI, V.; ALCANTARA-NUNEZ, J.; GUIMARAES, V.; LEPINE-SZILY, A.; ZAMORA, J.C.; MORO, A.M.; APPANNABABU, S.; ASSUNCAO, M.; BARIONI, A.; LINARES, R.; ZAGATTO, V.A.B.; FARIA, P.N. de; MORAIS, M.C.; MORCELLE, V.; SHORTO, J.M.B.
; LEI, JIN.
Evidence of the effect of strong stripping channels on the dynamics of the 8Li+58Ni reaction.
Physical Review C,
v. 103,
n. 6,
p. 064601-1 - 064601-10,
2021.
DOI:
10.1103/PhysRevC.103.064601
Abstract:
The 8Li+58Ni collision is investigated at 23.9, 26.1, 28.7, and 30 MeV bombarding energies. Quasielastic
angular distributions and the singles 7Li angular and energy distributions are presented. Coupled-reaction
channels (CRC) calculations, which include the coupling of the elastic channel to 59Ni = 58Ni +n states above
and below the neutron threshold, provide a simultaneous description of the quasielastic and transfer distributions
and evidence the strong effect of the one-neutron transfer/breakup channels on the quasielastic scattering. The
7Li angular and energy distributions have been also successfully analyzed combining the continuum discretized
coupled channels (CDCC) method, for the elastic breakup, and the IAV model of Ichimura, Austern, and Vincent
[Phys. Rev. C 32, 431 (1985)], for the nonelastic breakup. These calculations indicate that most of the 7Li yields
are due to nonelastic breakup contributions (transfer), whereas elastic breakup plays a minor role.
Palavras-Chave:
lithium 8 reactions;
nickel 58 reactions;
stripping;
coupled channel theory;
lithium 7
SANTOS, O.C.B.; LICHTENTHALER, R.; PIRES, K.C.C.; UMBELINO, U.; ZEVALLOS, E.O.N.; LARA, A.L. de; SERRA, A.S.; SCARDUELLI, V.; ALCANTARA-NUNEZ, J.; GUIMARAES, V.; LEPINE-SZILY, A.; ZAMORA, J.C.; MORO, A.M.; APPANNABABU, S.; ASSUNCAO, M.; BARIONI, A.; LINARES, R.; ZAGATTO, V.A.B.; FARIA, P.N. de; MORAIS, M.C.; MORCELLE, V.; SHORTO, J.M.B.; LEI, JIN.
Evidence of the effect of strong stripping channels on the dynamics of the 8Li+58Ni reaction.
Physical Review C,
v. 103,
n. 6,
p. 064601-1 - 064601-10,
2021.
DOI:
10.1103/PhysRevC.103.064601.
Disponível em: http://repositorio.ipen.br/handle/123456789/32401. Acesso em: $DATA.
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SPATAFORA, A.; CARBONE, D.; CAPPUZZELLO, F.; CAVALLARO, M.; ACOSTA, L.; AGODI, C.; AMADOR-VALENZUELA, P.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; DE GREGORIO, G.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; GARGANO, A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LINARES, R.; LUBIAN, J.; MEDINA, N.
; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SGOUROS, O.; SILVEIRA, M.A.G. da; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B..
Multichannel experimental and theoretical approach to the 12C(18O, 18F)12B single-charge-exchange reaction at 275 MeV: initial-state interaction and single-particle properties of nuclear wave functions.
Physical Review C,
v. 107,
n. 2,
p. 024605-1 - 024605-19,
2023.
DOI:
10.1103/PhysRevC.107.024605
Abstract:
Background: Single-charge-exchange reactions are appropriate tools to study the nuclear response to one-particle/one-hole isospin probes, gaining additional interest from the connection to beta decay. This analogy has been recently extended to second order, connecting double-charge-exchange reactions and double beta decays. Nowadays, the availability of powerful experimental setups and advanced nuclear theories and models allows one to access precious information on key nuclear structure aspects embedded in the widely sought neutrinoless double beta decay. Purpose: We intend to bring to light the main nuclear structure and reaction features involved in the 18O+12C collision at 275 MeV incident energy. In this paper, the main focus is on the role of the initial- and final-state interactions in the overall reaction dynamics and on the single-particle nuclear structure properties accessed via the study of single-nucleon transfer reactions. Forthcoming articles will be devoted to go into the details of the response to one- and two-particle/hole isospin probes. Methods: Cross-section energy spectra and angular distributions were measured in a unique experimental setup for the 12C(18O, 18O)12C elastic and inelastic scattering, the 12C(18O, 17O)13C one-neutron stripping, the 12C(18O, 19F)11B one-proton pickup, and the 12C(18O, 18F)12B single-charge-exchange nuclear reactions. A unique comprehensive and coherent theoretical calculation, able to describe the whole network of direct reactions using state-of-the-art nuclear structure and reaction theories, was performed, and it is presented for the first time in this article. This holistic approach, applied both to the experimental and theoretical analysis, is the main feature and worth of the work here presented. Results: The energy and angular resolutions achieved in each reaction channel allowed us to isolate specific transitions and to map the diffraction patterns in the angular distributions. The cross-section calculations describe well the experimental data, both in terms of the absolute values and diffraction patterns. Although the distorted wave Born approximation (DWBA) calculations prove to be accurate in describing all the studied channels, better results are achieved when the couplings to inelastic transitions in both the incoming and outgoing partitions are introduced, as done in the coupled channels Born approximation (CCBA) calculations. Otherwise, no real improvement is found when the coupling effects among different partitions are explicitly taken into account in the coupled reaction channels (CRC) calculations. Conclusions: The multichannel approach proposed in this paper is a promising method for accurate investigations of direct reactions originating in heavy-ion collisions. This is quite appealing for the precise spectroscopy of heavy nuclei proposed in many areas of nuclear physics. An example is the NUMEN project with its challenging commitment to provide valuable information on neutrinoless double beta decay nuclear matrix elements from single- and double-charge-exchange cross-section measurements.
Palavras-Chave:
nuclear matrix;
charge-exchange reactions;
excitation;
wave functions;
multi-channel analyzers
SPATAFORA, A.; CARBONE, D.; CAPPUZZELLO, F.; CAVALLARO, M.; ACOSTA, L.; AGODI, C.; AMADOR-VALENZUELA, P.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; DE GREGORIO, G.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; GARGANO, A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LINARES, R.; LUBIAN, J.; MEDINA, N.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SGOUROS, O.; SILVEIRA, M.A.G. da; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B.
Multichannel experimental and theoretical approach to the 12C(18O, 18F)12B single-charge-exchange reaction at 275 MeV: initial-state interaction and single-particle properties of nuclear wave functions.
Physical Review C,
v. 107,
n. 2,
p. 024605-1 - 024605-19,
2023.
DOI:
10.1103/PhysRevC.107.024605.
Disponível em: http://repositorio.ipen.br/handle/123456789/34001. Acesso em: $DATA.
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BURRELLO, S.; CALABRESE, S.; CAPPUZZELLO, F.; CARBONE, D.; CAVALLARO, M.; COLONNA, M.; LAY, J.A.; LENSKE, H.; AGODI, C.; FERREIRA, J.L.; FIRAT, S.; HACISALIHOGLU, A.; LA FAUCI, L.; SPATAFORA, A.; ACOSTA, L.; BELLONE, J.I.; BORELLO-LEWIN, T.; BOZTOSUN, I.; BRISCHETTO, G.A.; CALVO, D.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; CUTULI, M.; DELAUNAY, F.; FINOCCHIARO, P.; FISICHELLA, M.; FOTI, A.; IAZZI, F.; LANZALONE, G.; LINARES, R.; LUBIAN, J.; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SGOUROS, O.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B..
Multichannel experimental and theoretical constraints for the 116Cd(20Ne, 20F) 116In charge exchange reaction at 306 MeV.
Physical Review C,
v. 105,
n. 2,
p. 024616-1 - 024616-20,
2022.
DOI:
10.1103/PhysRevC.105.024616
Abstract:
Background: Charge-exchange (CE) reactions offer a major opportunity to excite nuclear isovector modes,
providing important clues about the nuclear interaction in the medium. Moreover, double charge-exchange
reactions are proving to be a tempting tool to access nuclear transition matrix elements (NMEs) related to double
beta-decay processes. The latter are also of crucial importance to extract neutrino properties from the half-life of
the hypothetical neutrinoless double beta decay and to search for physics beyond the standard model.
Purpose: Through a multichannel experimental analysis and a consistent theoretical approach of the
116Cd(20Ne, 20F) 116In single charge-exchange (SCE) reaction at 306 MeV, we aim at disentangling from the
experimental cross section the contribution of the competing mechanisms associated with second- or higherorder
sequential transfer and/or inelastic processes.
Methods: We measured excitation energy spectra and absolute cross sections for elastic + inelastic, one-proton
transfer and SCE channels by using the MAGNEX large acceptance magnetic spectrometer to detect the
ejectiles. For the first two channels, we also extracted the experimental cross-section angular distributions.
The experimental data are compared with theoretical predictions obtained by performing two-step distortedwave
Born approximation and coupled reaction channel calculations. We employ spectroscopic amplitudes for
single-particle transitions derived within a large-scale shell-model approach and different optical potentials for
modeling the initial- and the final-state interactions.
Results: The present study significantly mitigates the possible model dependence existing in the description
of these complex reaction mechanisms thanks to the satisfactory reproduction of several channels at once. In
particular, our work demonstrates that the two-step transfer mechanisms produce a non-negligible contribution to
the total cross section of the 116Cd(20Ne, 20F) 116In reaction channel, although a relevant fraction is still missing,
being ascribable to the direct SCE mechanism, which is not addressed here.
Conclusions: Our analysis provides a careful estimation of the sequential transfer processes which are competing
with the direct SCE mechanism for the heavy ion reaction under investigation. The study suggests that the
direct SCE should play an important role among the mechanisms populating the final channel. Nevertheless, the
analysis of the higher-order processes considered here is mandatory to isolate the direct SCE process contribution
and approach structure information on the corresponding NME from the reaction cross section. The description
of the latter process and the competition between the two mechanisms deserves further investigation.
Palavras-Chave:
charge exchange;
nuclear reactions;
nuclear matrix;
beta decay;
cadmium 116
BURRELLO, S.; CALABRESE, S.; CAPPUZZELLO, F.; CARBONE, D.; CAVALLARO, M.; COLONNA, M.; LAY, J.A.; LENSKE, H.; AGODI, C.; FERREIRA, J.L.; FIRAT, S.; HACISALIHOGLU, A.; LA FAUCI, L.; SPATAFORA, A.; ACOSTA, L.; BELLONE, J.I.; BORELLO-LEWIN, T.; BOZTOSUN, I.; BRISCHETTO, G.A.; CALVO, D.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; CUTULI, M.; DELAUNAY, F.; FINOCCHIARO, P.; FISICHELLA, M.; FOTI, A.; IAZZI, F.; LANZALONE, G.; LINARES, R.; LUBIAN, J.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SGOUROS, O.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B.
Multichannel experimental and theoretical constraints for the 116Cd(20Ne, 20F) 116In charge exchange reaction at 306 MeV.
Physical Review C,
v. 105,
n. 2,
p. 024616-1 - 024616-20,
2022.
DOI:
10.1103/PhysRevC.105.024616.
Disponível em: http://repositorio.ipen.br/handle/123456789/33221. Acesso em: $DATA.
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SGOUROS, O.; CUTULI, M.; CAPPUZZELLO, F.; CAVALLARO, M.; CARBONE, D.; AGODI, C.; GREGORIO, G. de; GARGANO, A.; LINARES, R.; BRISCHETTO, G.A.; CALVO, D.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; DELAUNAY, F.; DJAPO, H; EKE, C.; FINOCCHIARO, P.; FISICHELLA, M.; GUAZZELLI, M.A.; HACISALIHOGLU, A.; LUBIAN, J.; MEDINA, N.H.; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; SOUKERAS, V.; SOULIOTIS, G.; SPATAFORA, A.; TORRESI, D.; YILDIRIM, A.; ZAGATTO, V.A.B..
One-neutron transfer reaction in the 18O + 48Ti collision at 275 MeV.
Physical Review C,
v. 108,
n. 4,
p. 044611-1 - 044611-16,
2023.
DOI:
10.1103/PhysRevC.108.044611
Abstract:
The present article reports new data on the 48Ti(18O, 17O) 49Ti reaction at 275 MeV incident energy as part
of the systematic research pursued within the NUMEN (NUclear Matrix Elements for Neutrinoless double β
decay) project. Supplementary measurements of the same reaction on 16O and 27Al targets were also performed
in order to estimate the background arising from the use of a composite target (TiO2 + 27Al). These data were
analyzed under the same theoretical framework as those obtained with the titanium target in order to reinforce the
conclusions of our analysis. Differential cross-section angular distribution measurements for the 17O8+ ejectiles
were performed in a wide angular range by using the MAGNEX large acceptance magnetic spectrometer.
The experimental results were analyzed within the distorted-wave and coupled-channels Born approximation
frameworks. The optical potentials at the entrance and exit channels were calculated in a double folding approach
adopting the São Paulo potential, and the spectroscopic amplitudes for the projectile and target overlaps were
obtained from large-scale shell model calculations. The differential cross sections are well described by the
theoretical calculations, where a weak coupling to collective excitations of projectile and target is inferred. The
sensitivity of transfer cross sections on different model spaces adopted in nuclear structure calculations is also
discussed.
SGOUROS, O.; CUTULI, M.; CAPPUZZELLO, F.; CAVALLARO, M.; CARBONE, D.; AGODI, C.; GREGORIO, G. de; GARGANO, A.; LINARES, R.; BRISCHETTO, G.A.; CALVO, D.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; DELAUNAY, F.; DJAPO, H; EKE, C.; FINOCCHIARO, P.; FISICHELLA, M.; GUAZZELLI, M.A.; HACISALIHOGLU, A.; LUBIAN, J.; MEDINA, N.H.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; SOUKERAS, V.; SOULIOTIS, G.; SPATAFORA, A.; TORRESI, D.; YILDIRIM, A.; ZAGATTO, V.A.B.
One-neutron transfer reaction in the 18O + 48Ti collision at 275 MeV.
Physical Review C,
v. 108,
n. 4,
p. 044611-1 - 044611-16,
2023.
DOI:
10.1103/PhysRevC.108.044611.
Disponível em: http://repositorio.ipen.br/handle/123456789/34342. Acesso em: $DATA.
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SGOUROS, O.; CAVALLARO, M.; CAPPUZZELLO, F.; CARBONE, D.; AGODI, C.; GARGANO, A.; DE GREGORIO, G.; ALTANA, C.; BRISCHETTO, G.A.; BURRELLO, S.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; CUTULI, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FISICHELLA, M.; FOTI, A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LINARES, R.; LUBIAN, J.; MEDINA, N.H.; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PINNA, F.; RUSSO, G.; GUAZZELLI, M.A.; SOUKERAS, V.; SOULIOTIS, G.; SPATAFORA, A.; TORRESI, D.; YILDIRIM, A.; ZAGATTO, V.A.B..
One-proton transfer reaction for the 18O+48Ti system at 275 MeV.
Physical Review C,
v. 104,
n. 3,
p. 034617-1 - 034617-12,
2021.
DOI:
10.1103/PhysRevC.104.034617
Abstract:
Single-nucleon transfer reactions are processes that selectively probe single-particle components of the
populated many-body nuclear states. In this context, recent efforts have been made to build a unified description
of the rich nuclear spectroscopy accessible in heavy-ion collisions. An example of this multichannel approach
is the study of the competition between successive nucleon transfer and charge exchange reactions, the latter
being of particular interest in the context of single and double beta decay studies. To this extent, the one-proton
pickup reaction 48Ti(18O, 19F) 47Sc at 275 MeV was measured for the first time, under the NUMEN experimental
campaign. Differential cross-section angular distribution measurements for the 19F ejectiles were performed at
INFN-LNS in Catania by using the MAGNEX large acceptance magnetic spectrometer. The data were analyzed
within the distorted-wave and coupled-channels Born approximation frameworks. The initial and final-state
interactions were described adopting the São Paulo potential, whereas the spectroscopic amplitudes for the
projectile and target overlaps were derived from shell-model calculations. The theoretical cross sections are
found to be in very good agreement with the experimental data, suggesting the validity of the optical potentials
and the shell-model description of the involved nuclear states within the adopted model space.
Palavras-Chave:
matrix elements;
nuclear matrix;
charge-exchange reactions;
double beta decay;
cross sections
SGOUROS, O.; CAVALLARO, M.; CAPPUZZELLO, F.; CARBONE, D.; AGODI, C.; GARGANO, A.; DE GREGORIO, G.; ALTANA, C.; BRISCHETTO, G.A.; BURRELLO, S.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; CIRALDO, I.; CUTULI, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FISICHELLA, M.; FOTI, A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LINARES, R.; LUBIAN, J.; MEDINA, N.H.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PINNA, F.; RUSSO, G.; GUAZZELLI, M.A.; SOUKERAS, V.; SOULIOTIS, G.; SPATAFORA, A.; TORRESI, D.; YILDIRIM, A.; ZAGATTO, V.A.B.
One-proton transfer reaction for the 18O+48Ti system at 275 MeV.
Physical Review C,
v. 104,
n. 3,
p. 034617-1 - 034617-12,
2021.
DOI:
10.1103/PhysRevC.104.034617.
Disponível em: http://repositorio.ipen.br/handle/123456789/32402. Acesso em: $DATA.
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UMBELINO, U.; LICHTENTHALER, R.; SANTOS, O.C.B.; PIRES, K.C.C.; SERRA, A.S.; SCARDUELLI, V.; LARA, A.L. de; ZEVALLOS, E.O.N.; ZAMORA, J.C.; LEPINE-SZILY, A.; SHORTO, J.M.B.
; ASSUNCAO, M.; ZAGATTO, V.A.B..
Quasielastic scattering of light radioactive and stable projectiles on 9Be.
Physical Review C,
v. 106,
n. 5,
p. 054602-1 - 054602-15,
2022.
DOI:
10.1103/PhysRevC.106.054602
Abstract:
Quasielastic scattering angular distributions of radioactive (8Li, 7,10Be, and 8,12B) and stable (6,7Li, 9Be, and
11B) projectiles on a 9Be target are presented. The angular distributions have been analyzed by the optical model
using Woods-Saxon form factor and São Paulo potential. Total reaction cross sections have been obtained from
the optical model analysis and a comparison between different systems is presented. Coupled channels (CC),
coupled reaction channels (CRC), and continuum-discretized coupled channels (CDCC) calculations have been
performed to investigate the effect of the cluster configuration in the projectile inelastic excitation, breakup, and
stripping reactions on the quasielastic angular distributions.
UMBELINO, U.; LICHTENTHALER, R.; SANTOS, O.C.B.; PIRES, K.C.C.; SERRA, A.S.; SCARDUELLI, V.; LARA, A.L. de; ZEVALLOS, E.O.N.; ZAMORA, J.C.; LEPINE-SZILY, A.; SHORTO, J.M.B.; ASSUNCAO, M.; ZAGATTO, V.A.B.
Quasielastic scattering of light radioactive and stable projectiles on 9Be.
Physical Review C,
v. 106,
n. 5,
p. 054602-1 - 054602-15,
2022.
DOI:
10.1103/PhysRevC.106.054602.
Disponível em: http://repositorio.ipen.br/handle/123456789/33877. Acesso em: $DATA.
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CREMA, E.; ZAGATTO, V.A.B.; SHORTO, J.M.B.
; PAES, B.; LUBIAN, J.; SIMÕES, R.F.; MONTEIRO, D.S.; HUIZA, J.F.P.; ADDED, N.; MORAIS, M.C.; GOMES, P.R.S..
Reaction mechanisms of the O-16 + Cu-65 system.
Physical Review C,
v. 99,
n. 5,
p. 054623-1 - 054623-10,
2019.
DOI:
10.1103/PhysRevC.99.054623
Abstract:
We have measured a precise quasielastic excitation function for the 16O + 65Cu system, at θLAB = 161◦,
and at bombarding energies near the Coulomb barrier. A quasielastic barrier distribution for this system was
deduced from the experimental quasielastic excitation function. An α-stripping excitation function has also
been measured at the same experimental conditions. These new data have been used to investigate the relative
importance of several reaction channels in the reaction mechanism of the 16O + 65Cu system. Large-scale
coupled-channel calculations and coupled-reaction-channel calculations have been performed. No imaginary
potential was used at the barrier region because many channels have been explicitly included in the calculations.
Only an inner short-range potential was used to account for the fusion process. We did not fit data by varying
potential parameters, and our theoretical results were compared directly to data. Good agreement was found
between data and calculations. Owing to the high sensitivity of the barrier distribution, important results
have been obtained. The first excited state (1/2−) of 65Cu has less influence in the reaction mechanism than
the second (5/2−) and third (7/2−) states, which are the most relevant among all the investigated ones. We
have also observed a striking influence of the reorientation of the ground-state spin of the 65Cu nucleus on
the elastic scattering at backward angles. In addition, calculations have shown that the excitation of the states
3−
, 2+
, 1−, and 2− of the projectile 16O are also important for excellent agreement obtained with both the
excitation function and the distribution of barriers. The α-stripping data have been compared to the results of
coupled-reaction-channel calculations and good agreement was obtained with the inclusion of the first excited
state of 12C in the coupling scheme. However, the α-transfer process has a small influence on the reaction
dynamics of this system at the investigated energies.
Palavras-Chave:
copper isotopes;
oxygen 16 reactions;
copper 65 target;
elastic scattering;
chemical reactions;
theoretical data;
experimental data
CREMA, E.; ZAGATTO, V.A.B.; SHORTO, J.M.B.; PAES, B.; LUBIAN, J.; SIMÕES, R.F.; MONTEIRO, D.S.; HUIZA, J.F.P.; ADDED, N.; MORAIS, M.C.; GOMES, P.R.S.
Reaction mechanisms of the O-16 + Cu-65 system.
Physical Review C,
v. 99,
n. 5,
p. 054623-1 - 054623-10,
2019.
DOI:
10.1103/PhysRevC.99.054623.
Disponível em: http://repositorio.ipen.br/handle/123456789/30026. Acesso em: $DATA.
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CREMA, E.; ZAGATTO, V.A.B.; SHORTO, J.M.B.
; PAES, B.; LUBIAN, J.; SIMOES, R.F.; MONTEIRO, D.S.; HUIZA, J.F.P.; ADDED, N.; MORAIS, M.C.; GOMES, P.R.S..
Reaction mechanisms of the O-18+Cu-63 system at near-barrier energies.
Physical Review C,
v. 98,
n. 4,
p. 044614-1 - 044614-10,
2018.
DOI:
10.1103/PhysRevC.98.044614
Abstract:
A precise quasielastic excitation function for the O-18 + Cu-63 system has been measured at energies around the Coulomb barrier at theta(LAB) = 161 degrees. The corresponding quasielastic barrier distribution has been derived. Two-neutron-, one-proton-, and alpha-transfer-excitation functions have also been measured at the same energies and angle. Coupled reaction channels calculations were performed to describe the experimental data. Largescale shell-model calculations were performed to derive most of the spectroscopic amplitudes. No surface imaginary potential was necessary for the interaction potential because almost all relevant reaction channels were explicitly included in the calculation. The theoretical results were compared to the experimental quasielastic barrier distribution and a very good agreement was achieved. The comparison of the coupled reaction channel calculations and data has put in evidence several important details of the reaction mechanism of the O-18 + Cu-63 system. The collectivity of the Cu-63 nucleus has important contribution to the reaction mechanism of this system, mainly due to its first 5/2(+) and 7/2(+) states. It was also observed a striking influence on the reaction dynamics of the O-18(2(+)) state, the two-neutron transfer and the reorientation of the target ground-state spin. The best agreement to data was achieved when the nuclear matter diffuseness for the O-18 was assumed equal to 0.60 fm, value that we have derived in a previous paper and that is 10% greater than the O-16 diffuseness. Another significant result was that the two-neutron transfer process is much more relevant than the one-neutron-transfer process, which suggests that the pairing correlation could play an important role in the transfer process of this system.
Palavras-Chave:
copper isotopes;
oxygen 18 reactions;
copper 63 target;
elastic scattering;
chemical reactions;
theoretical data;
experimental data
CREMA, E.; ZAGATTO, V.A.B.; SHORTO, J.M.B.; PAES, B.; LUBIAN, J.; SIMOES, R.F.; MONTEIRO, D.S.; HUIZA, J.F.P.; ADDED, N.; MORAIS, M.C.; GOMES, P.R.S.
Reaction mechanisms of the O-18+Cu-63 system at near-barrier energies.
Physical Review C,
v. 98,
n. 4,
p. 044614-1 - 044614-10,
2018.
DOI:
10.1103/PhysRevC.98.044614.
Disponível em: http://repositorio.ipen.br/handle/123456789/29414. Acesso em: $DATA.
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ZAGATTO, V.A.B.; CREMA, E.; SHORTO, J.M.B.
; MORAIS, M.C.; LUBIAN, J.; ADDED, N.; SIMÕES, R.F.; MONTEIRO, D.S.; HUIZA, J.F.P.; PAES, B.; GOMES, P.R.S..
Scattering of 16,18O beams on 63,65Cu targets: a systematic study of different reaction channels.
Physical Review C,
v. 100,
n. 4,
p. 044602-1 - 044602-11,
2019.
DOI:
10.1103/PhysRevC.100.044602
Abstract:
Precise quasielastic experimental excitation function for the 18O + 65Cu system has been measured and its
barrier distribution has been derived. Several reaction channels have been observed on the experimental spectra,
revealing the presence of two-neutron and α-stripping processes, as well as the proton pickup transfer, for which
excitation functions were also measured. Extensive coupled channel and coupled reaction channel calculations
have been performed to describe the experimental data. The inelastic couplings of target and projectile, and the
ground state reorientation of the target, were important to the proper description of data. The transfer data were
well described by calculations; however, it was shown that they almost do not affect the excitation function of
18O + 65Cu quasielastic scattering. Whenever possible, structure shell model calculations have been performed
to obtain the spectroscopic amplitudes of projectile and target overlaps. The two-neutron and α-transfer reactions
have been calculated considering the transferred particle as a cluster with spin 0.
Palavras-Chave:
excitation systems;
inelastic scattering;
nuclear reactions;
copper 63 reactions;
copper 65 reactions;
oxygen 16 reactions;
oxygen 18 reactions;
beams
ZAGATTO, V.A.B.; CREMA, E.; SHORTO, J.M.B.; MORAIS, M.C.; LUBIAN, J.; ADDED, N.; SIMÕES, R.F.; MONTEIRO, D.S.; HUIZA, J.F.P.; PAES, B.; GOMES, P.R.S.
Scattering of 16,18O beams on 63,65Cu targets: a systematic study of different reaction channels.
Physical Review C,
v. 100,
n. 4,
p. 044602-1 - 044602-11,
2019.
DOI:
10.1103/PhysRevC.100.044602.
Disponível em: http://repositorio.ipen.br/handle/123456789/30474. Acesso em: $DATA.
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LEISTENSCHNEIDER, E.; LEPINE-SZILY, A.; ALVAREZ, M.A.G.; MENDES, D.R.; LICHTENTHALER, R.; AGUIAR, V.A.P.; ASSUNCAO, M.; PAMPA CONDORI, R.; SILVA, U.U. da; FARIA, P.N. de; DESHMUKH, N.; DUARTE, J.G.; GASQUES, L.R.; GUIMARAES, V.; MACCHIONE, E.L.A.; MORAIS, M.C.; MORCELLE, V.; PIRES, K.C.C.; SCARDUELLI, V.B.; SCOTTON, G.; SHORTO, J.M.B.
; ZAGATTO, V.A.B..
Spectroscopy of high-lying resonances in 9Be by the measurement of ( p, p), ( p, d), and ( p, α) reactions with a radioactive 8Li beam.
Physical Review C,
v. 98,
n. 6,
p. 064601-1 - 064601-1,
2018.
DOI:
10.1103/PhysRevC.98.064601
Abstract:
We measured the 8Li(p, p)8Li, 8Li(p, d)7Li, and 8Li(p, α)5He reactions at low energies using the thick
target inverse kinematics method, with a polyethylene [CH2]n target and a radioactive 8Li beam available at the
Radioactive Ion Beams in Brazil facility of São Paulo. By measuring simultaneously several reaction channels
(p, p), (p, d), and (p, α), the still uncertain high-lying resonances of 9Be, close to the proton threshold, can
be studied and their parameters, such as energy, width, and spin parity can be more reliably determined. The
experimental excitation functions of the reactions 8Li(p, p)8Li, 8Li(p, d)7Li, and 8Li(p, α)5He were analyzed
using the R-matrix theory, which allows us to infer the properties of the resonances. Multichannel R-matrix
analysis provides evidence for a significant clustering in the (p, d) channel. The experimental data and the
multichannel R-matrix analysis will be presented.
Palavras-Chave:
spectroscopy;
lithium 8 beams;
beryllium 9;
resonance;
radioactive ion beams;
elastic scattering;
polyethylenes;
targets;
nucleosynthesis;
excitation functions
LEISTENSCHNEIDER, E.; LEPINE-SZILY, A.; ALVAREZ, M.A.G.; MENDES, D.R.; LICHTENTHALER, R.; AGUIAR, V.A.P.; ASSUNCAO, M.; PAMPA CONDORI, R.; SILVA, U.U. da; FARIA, P.N. de; DESHMUKH, N.; DUARTE, J.G.; GASQUES, L.R.; GUIMARAES, V.; MACCHIONE, E.L.A.; MORAIS, M.C.; MORCELLE, V.; PIRES, K.C.C.; SCARDUELLI, V.B.; SCOTTON, G.; SHORTO, J.M.B.; ZAGATTO, V.A.B.
Spectroscopy of high-lying resonances in 9Be by the measurement of ( p, p), ( p, d), and ( p, α) reactions with a radioactive 8Li beam.
Physical Review C,
v. 98,
n. 6,
p. 064601-1 - 064601-1,
2018.
DOI:
10.1103/PhysRevC.98.064601.
Disponível em: http://repositorio.ipen.br/handle/123456789/29415. Acesso em: $DATA.
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-
CREMA, E.; PAES, B.; ZAGATTO, V.A.B.; HUIZA, J.F.P.; LUBIAN, J.; SHORTO, J.M.B.
; SIMÕES, R.F.; MONTEIRO, D.S.; ADDED, N.; MORAIS, M.C.; GOMES, P.R.S..
Strong neutron-transfer coupling effects in the reaction mechanism of the 18O + 64Zn system at energies near the Coulomb barrier.
Physical Review C,
v. 100,
n. 5,
p. 054608-1 - 054608-11,
2019.
DOI:
10.1103/PhysRevC.100.054608
Abstract:
The precise quasielastic excitation function for the 18O + 64Zn system was measured at energies near and
below the Coulomb barrier at θlab = 161◦, from which its correlated quasielastic barrier distribution was derived.
The excitation functions for the two-neutron, α, and tritium transfer reactions have also been measured at
the same conditions. These data were well described by the coupled channel and coupled reaction channel
calculations. The comparison of the data with theoretical calculations shows the strong influence of three
inelastic channels in the coupling process: the quadrupole and octupole vibrational states of 64Zn, 2+
1 and 3−
1 ,
and the quadrupole vibrational state of 18O, 2+
1 . In addition, theoretical calculations indicate that the two-neutron
stripping is mostly due to a one-step process, which has a striking effect on the reaction mechanism of this
system.
Palavras-Chave:
energy dependence;
coulomb field;
neutron transfer;
zinc 64 target;
oxygen 18;
coupling;
inelastic scattering;
tritium;
transfer reactions
CREMA, E.; PAES, B.; ZAGATTO, V.A.B.; HUIZA, J.F.P.; LUBIAN, J.; SHORTO, J.M.B.; SIMÕES, R.F.; MONTEIRO, D.S.; ADDED, N.; MORAIS, M.C.; GOMES, P.R.S.
Strong neutron-transfer coupling effects in the reaction mechanism of the 18O + 64Zn system at energies near the Coulomb barrier.
Physical Review C,
v. 100,
n. 5,
p. 054608-1 - 054608-11,
2019.
DOI:
10.1103/PhysRevC.100.054608.
Disponível em: http://repositorio.ipen.br/handle/123456789/30851. Acesso em: $DATA.
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Como referenciar este item
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UMBELINO, U.; PIRES, K.C.C.; LICHTENTHALER, R.; SCARDUELLI, V.; SCOTTON, G.A.; LEPINE-SZILY, A.; GUIMARÃES, V.; LUBIAN, J.; PAES, B.; FERREIRA, J.L.; ALVAREZ, M.A.G.; SHORTO, J.M.B.
; APPANNABABU, S.; ASSUNÇÃO, M.; CONDORI, R.P.; MORCELLE, V..
Two-neutron transfer in 7Be + 9Be collisions.
Physical Review C,
v. 99,
n. 6,
p. 064617-1 - 064617-13,
2019.
DOI:
10.1103/PhysRevC.99.064617
Abstract:
Elastic scattering and transfer cross sections for the 7Be + 9Be system have been measured at Elab =
23.1 MeV using the 7Be radioactive secondary beam produced at Radioactive Ion Beams in Brazil facility
at the University of São Paulo. The elastic scattering has been measured by detecting the 7Be scattered at
forward angles in the laboratory system. The transfer reaction 9Be(7Be, 9Be)7Be was identified by detecting
the 9Be scattered at the same laboratory angles. The elastic angular distribution has been analyzed by optical
model calculations using a Woods-Saxon form factor whose parameters have been varied to best reproduce the
experimental data at forward angles. Coupled reaction channels calculations (CRC) have been performed to
describe the transfer, considering the coupling to the transfer channel and including contributions to the ground
state and to the first excited state of 7Be(1/2−; 429 keV) in the final state. The spectroscopic amplitudes used in
the CRC calculation have been derived from shell-model calculations. Similar CRC calculations were applied to
existing 9Be(p, t )7Be data to check the consistency of our results results for the (7Be, 9Be) transfer reaction.
Palavras-Chave:
beryllium 7;
beryllium 9;
elastic scattering;
coupled channel theory;
ion beams;
neutrons;
neutron beams;
neutron transfer
UMBELINO, U.; PIRES, K.C.C.; LICHTENTHALER, R.; SCARDUELLI, V.; SCOTTON, G.A.; LEPINE-SZILY, A.; GUIMARÃES, V.; LUBIAN, J.; PAES, B.; FERREIRA, J.L.; ALVAREZ, M.A.G.; SHORTO, J.M.B.; APPANNABABU, S.; ASSUNÇÃO, M.; CONDORI, R.P.; MORCELLE, V.
Two-neutron transfer in 7Be + 9Be collisions.
Physical Review C,
v. 99,
n. 6,
p. 064617-1 - 064617-13,
2019.
DOI:
10.1103/PhysRevC.99.064617.
Disponível em: http://repositorio.ipen.br/handle/123456789/30357. Acesso em: $DATA.
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APPANNABABU, S.; LICHTENTHALER, R.; ALVAREZ, M.A.G.; RODRIGUEZ-GALLARDO, M.; LEPINE-SZILY, A.; PIRES, K.C.C.; SANTOS, O.C.B.; SILVA, U.U.; FARIA, P.N. de; GUIMARÃES, V.; ZEVALLOS, E.O.N.; SCARDUELLI, V.; ASSUNÇÃO, M.; SHORTO, J.M.B.
; BARIONI, A.; ALCANTARA-NUNEZ, J.; MORCELLE, V..
Two-neutron transfer in the He-6 + Sn-120 reaction.
Physical Review C,
v. 99,
n. 1,
p. 014601-1 - 014601-7,
2019.
DOI:
10.1103/PhysRevC.99.014601
Abstract:
A large yield of α particles produced in the 120Sn(6He, α) reaction was measured at 20.3-, 22.2-, 22.4-, and
24.5-MeV bombarding energies. The α particles are distributed over a broad energy range in the vicinity and
below the elastic scattering 6He peak. Energy integrated α-particle cross sections have been obtained at θlab =
36◦, 40◦, and 60◦. The α energy distributions have been analyzed at a fixed laboratory angle (≈60◦) in terms of
the reaction Q value, considering the 2n-transfer reaction kinematics 120Sn(6He, α)122Sn. A kinematical analysis
of the Q-value distribution shows that the recoil system 120Sn + 2n is formed in highly excited states in the
continuum, at increasing excitation energies as the bombarding energy increases. It is shown that by using Brink’s
formula, the excitation energy depends on the transferred angular momentum following a linear relation with the
square of the angular momentum, indicating that some kind of dinuclear rotating system is formed after the
reaction.
Palavras-Chave:
two-nucleon transfer reactions;
neutron transfer;
alpha particles;
helium 6 reactions;
tin 120 reactions;
nuclear reactions;
radioactive ion beams
APPANNABABU, S.; LICHTENTHALER, R.; ALVAREZ, M.A.G.; RODRIGUEZ-GALLARDO, M.; LEPINE-SZILY, A.; PIRES, K.C.C.; SANTOS, O.C.B.; SILVA, U.U.; FARIA, P.N. de; GUIMARÃES, V.; ZEVALLOS, E.O.N.; SCARDUELLI, V.; ASSUNÇÃO, M.; SHORTO, J.M.B.; BARIONI, A.; ALCANTARA-NUNEZ, J.; MORCELLE, V.
Two-neutron transfer in the He-6 + Sn-120 reaction.
Physical Review C,
v. 99,
n. 1,
p. 014601-1 - 014601-7,
2019.
DOI:
10.1103/PhysRevC.99.014601.
Disponível em: http://repositorio.ipen.br/handle/123456789/30047. Acesso em: $DATA.
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A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.
O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.