20Ne + 76Ge elastic and inelastic scattering at 306 MeV

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-beta 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-beta 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.

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• Elastic and inelastic scattering of ${}^{16}$O on ${}^{27}$Al and ${}^{28}$Si at 240 MeV
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Cited by in corpus (5)

• Study of one-proton transfer reaction for the ${}^{18}$O + ${}^{48}$Ti system at 275 MeV
• Multi-channel experimental and theoretical constraints for the ${}^{116}$Cd(${}^{20}$Ne,${}^{20}$F)${}^{116}$In charge exchange reaction at 306 MeV
• Analysis of one-neutron transfer reaction in ${}^{18}$O + ${}^{76}$Se collision at 275 MeV
• Analysis of the background on cross section measurements with the MAGNEX spectrometer: the (20Ne,20O) Double Charge Exchange case
• One-neutron transfer reaction in the ${}^{18}$O + ${}^{48}$Ti collision at 275 MeV