Sub-Coulomb barrier penetration for a ⁶Li with a clustered and deformed ground-state

¹ Università degli Studi di Catania – Catania, Italy
² Universidad de Sevilla – Seville, Spain
³ Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud – Catania, Italy
⁴ Università degli Studi di Padova – Padua, Italy
⁵ Istituto Nazionale di Fisica Nucleare, Sezione di Padova – Padua, Italy
⁶ Instituto Interuniversitario Carlos I de Física Teórica y Computacional – Seville, Spain

^* e-mail: perrotta@lns.infn.it

Published online: 3 February 2023

Abstract

The penetrability of the Coulomb barrier of ⁶Li by a proton is studied using a quantum cluster model. We focus on the role of quadrupole deformations in the nucleus ground-state, in terms of which a ⁶Li–p form factor with tensor components is computed. We find that the diagonal part of the tensor term reduces the average barrier penetrability of the system. However, the tensor interaction due only to the mechanism studied at present is very small, regardless of the specific adopted construction, and yields negligible effects.