Negative parity states and ground state properties of the????n system calculated by different forces

Abstract

In recent years predictions on the off-shell behavior of composite particles interactions have been made by some theoretical models. The goal of this paper is to test them by using 9Be nucleus. The bound state problem of 9Be considered as a e-~-n threecluster system is solved in configuration space. Several on-shell equivalent local and nonlocal forces for the e-e and n-e interactions are used for calculation of the low lying negative parity spectrum of 9Be, and also of the charge density, quadrupole moment, and the correlation density of 9Be ground state. The contributions to the calculated quantities of different partial waves of the two-body forces are examined and discussed.

Nuclear electric dipole moment of light nuclei in the gaussian expansion method

“…In the cluster approximation, 6 Li and 9 Be are considered as α + n + p [51,52] and α + α + n [53,54,55] three-body systems, respectively. The CP-even effective α − N and α − α interactions are obtained from the fit which reproduces the low energy scattering phase shift of the corresponding systems [56,51].…”