Systematics ofgfactors of21+states in even-even nuclei from Gd to Pt: A microscopic description by the projected shell model

Abstract

The systematics of g factor of first excited 2 + state vs neutron number N is studied by the projected shell model. The study covers the even-even nuclei of all isotopic chains from Gd to Pt. g factors are calculated by using the many-body wavefunctions that reproduces well the energy levels and B(E2)s of the ground-state bands. For Gd to W isotopes the characteristic feature of the g factor data along an isotopic chain is described by the present model. Deficiency of the model in the g factor description for the heavier Os and Pt isotopes is discussed.

Platinum nuclei: Concealed configuration mixing and shape coexistence

“…The same conclusion was reached by Harder et al [38]. More recently, Bian et al [21] carried out projected shell-model calculations starting from a deformed basis, concentrating on g-factors for the 2 + 1 state throughout the rare-earth region, i.e. from Gd up to the Pt nuclei.…”

Triaxial projected shell model study of the rapid changes inB(E2)for180−190Pt isotopes

“…The theoretical work, therefore, suggests that from A = 184 to 196, Pt-isotopes should be studied by using the triaxial mean-field approach. Indeed, the early systematic study of electromagnetic transition properties using the axially-symmetric mean-field as a starting point indicated a clear deficiency in the wave functions for the description of 184−196 Pt isotopes [30].…”

Evolution of collectivity near mid-shell from excited-state lifetime measurements in rare earth nuclei

“…(1). Within the IBM, this has effectively been incorporated by considering fractional filling of the shell, and a more microscopic approach within the projected shell model [4] came to similar conclusions.…”