Multichannel experimental and theoretical constraints for the 116Cd(20Ne, 20F) 116In charge exchange reaction at 306 MeV
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2022
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Physical Review C
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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.
Como referenciar
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: 26 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.