Shell model calculations of the nuclear structure in the ``island of inversion'' N=20 region: Na-31,Na-33,Na-35 isotopes

Document Type

Article

Publication Date

6-1-2022

Abstract

The unmixed intruder configurations (2p-2h) were studied for (31)'(33)'Na-35 isotopes inside the island of inversion within the SDPF-U Hamiltonian with restrictions. The proton's positions that give a good correlation energy were determined for the first time. The unmixed intruder configurations (2p-2h), in addition of the proton's positions, were found using the restriction technique. The proposed restricted configurations were applied to calculate the low-lying states and probabilities of the transitions B(E2 : 0(1)(+) -> 2(1)(+)) with effective charges e(p) = 1.3e and e(n) = 0.537e for the Na-31,Na-33,Na-35 isotopes. Moreover, the outcomes of this work compared reasonable well to the available experimental results. The good agreement between the theoretical and the experimental values, especially for the first three positive states 3/2, 5/2 and 7/2, confirmed the domination of unmixed (2p_2h) intruder configurations in the ground states for these nuclei. On the basis of this agreement, two positive states (9/2, 1/2) are suggested in this paper. Furthermore, the theoretical results showed the accuracy of SDPF-U Hamiltonian in calculations for this region (N=20).

Keywords

Nuclear structure, Shell model, Island of inversion and Na isotopes

Publication Title

Journal of the Korean Physical Society

Divisions

PHYSICS

Funders

University of Diyala

Volume

80

Issue

12

Publisher Location

635-4, YUKSAM-DONG, KANGNAM-KU, SEOUL 135-703, SOUTH KOREA

This document is currently not available here.

Share

COinS