Configuration mixing in even-even Sm 148-154 within the interacting boson model

Document Type

Article

Publication Date

4-1-2024

Abstract

The interacting boson model with configuration mixing due to two-particle-two-hole excitations is applied to describe even-even Sm148-154 to investigate the cross-shell excitation effects in these nuclei. It is shown from the fitting results to the experimentally known positive-parity level energies, B(E2) values, and electric quadrupole moments that the IBM configuration mixing (CM) describes these nuclei better than the IBM consistent-Q formalism without the configuration mixing. Especially, the IBM-CM fitting results to the known B(E2) values are significantly improved. Furthermore, it is shown from the IBM-CM fitting results that the intruder configuration turns to be always dominant in the 02+, 22+, and 42+ states of well-deformed Sm150,152,154. Most notably, there is a clear normal-intruder configuration crossover along the yrast line of these nuclei described by the IBM-CM.

Publication Source (Journal or Book title)

Physical Review C

This document is currently not available here.

Share

COinS