Programme

P.30 -- Poster, VCTP-48

Date: Tuesday, 1 August 2023

Time: 08:30 - 10:00

The effect of neutron excess transition density in the study of ($^3$He,$t$) isobaric single charge-exchange reactions

Phan Nhut Huan

Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam

The isobaric single charge-exchange reactions, which are determined directly by the Fermi transition between the isobaric analog state (IAS) and the ground state of the target, can be used to investigate the neutron skin thickness in heavy nucleus. In this study, we analyze the ($^3$He,$t$)IAS reactions within the framework of Lane model. To determine the microscopic nucleus-nucleus optical potential, we employ the double-folding model using the Argonne v18 $G$-matrix interaction derived from Brueckner--Hartree--Fock calculation in nuclear matter. The transition potential is determined by considering the isovector and neutron excess density, which are obtained from the Skyrme-Hartree-Fock calculation. The results indicate that a clear improvement in the theoretical prediction of ($^3$He,$t$)IAS reactions is found when the neutron excess density is used to determine the transition densities. The relation between the neutron skin thickness, and the core-polarization by the Coulomb effect in the description of the ($^3$He,$t$)IAS reactions is discussed in this work.

Presenter: Phan Nhut Huan