Double charge exchange (DCE) reactions could provide experimentally driven information about nuclear matrix elements of interest in the context of neutrinoless double-β decay. To achieve this goal, a detailed description of the reaction mechanism is mandatory. This requires the full characterization of the initial and final-state interactions, which are poorly known for many of the projectile-target systems involved in future DCE studies. Among these, we intend to study the20 Ne +130 Te and18 O +116 Sn systems at 15.3 AMeV, which are particularly relevant due to their connection with the130 Te→130 Xe and116 Cd→116 Sn double-β decays. We measure the elastic and inelastic scattering cross-section angular distributions and compare them with theoretical calculations performed in the optical model, one-step distorted wave Born approximation, and coupled-channel approaches using the São Paulo double-folding optical potential. A good description of the experimental data in the whole explored range of transferred momenta is obtained provided that couplings with the 2+1 states of the projectile and target are explicitly included within the coupled-channel approach. These results are relevant also in the analysis of other quasi-elastic reaction channels in these systems, in which the same couplings should be included.

Initial state interaction for the20 ne +130 te and18 o +116 sn systems at 15.3 amev from elastic and inelastic scattering measurements

Carbone D.;Cappuzzello F.;Cavallaro M.;Fisichella M.;Spatafora A.;Agodi C.;Brischetto G. A.;Ciraldo I.;Cutuli M.;Delaunay F.;Finocchiaro P.;Foti A.;Lanzalone G.;Pandola L.;Soukeras V.;Torresi D.;Tudisco S.;
2021-01-01

Abstract

Double charge exchange (DCE) reactions could provide experimentally driven information about nuclear matrix elements of interest in the context of neutrinoless double-β decay. To achieve this goal, a detailed description of the reaction mechanism is mandatory. This requires the full characterization of the initial and final-state interactions, which are poorly known for many of the projectile-target systems involved in future DCE studies. Among these, we intend to study the20 Ne +130 Te and18 O +116 Sn systems at 15.3 AMeV, which are particularly relevant due to their connection with the130 Te→130 Xe and116 Cd→116 Sn double-β decays. We measure the elastic and inelastic scattering cross-section angular distributions and compare them with theoretical calculations performed in the optical model, one-step distorted wave Born approximation, and coupled-channel approaches using the São Paulo double-folding optical potential. A good description of the experimental data in the whole explored range of transferred momenta is obtained provided that couplings with the 2+1 states of the projectile and target are explicitly included within the coupled-channel approach. These results are relevant also in the analysis of other quasi-elastic reaction channels in these systems, in which the same couplings should be included.
Coupled-channel calculations
Double beta decay
Double charge exchange reactions
Elastic and inelastic scattering
Initial state interaction
MAGNEX magnetic spectrometer
Optical potential
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/526899
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