Initial State Interaction for the Ne-20

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Carbone D., Linares R., Amador-Valenzuela P., Calabrese S., Cappuzzello F., Cavallaro M., ...More

UNIVERSE, vol.7, no.3, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 7 Issue: 3
  • Publication Date: 2021
  • Doi Number: 10.3390/universe7030058
  • Journal Name: UNIVERSE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC, Directory of Open Access Journals
  • Keywords: initial state interaction, elastic and inelastic scattering, MAGNEX magnetic spectrometer, coupled-channel calculations, optical potential, double charge exchange reactions, double beta decay, CHARGE-EXCHANGE REACTIONS, NUCLEAR-MATRIX ELEMENT, DOUBLE-BETA-DECAY, ELASTIC-SCATTERING, HEAVY, ENERGIES, SYSTEMATICS, VIBRATION, CHANNELS, MODEL
  • Recep Tayyip Erdoğan University Affiliated: No


Double charge exchange (DCE) reactions could provide experimentally driven information about nuclear matrix elements of interest in the context of neutrinoless double-beta 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 the Ne-20 + Te-130 and O-18 + Sn-116 systems at 15.3 AMeV, which are particularly relevant due to their connection with the Te-130 -> Xe-130 and Cd-116 -> Sn-116 double-beta 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 Sao 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.