The platinum nuclei : concealed configuration mixing and shape coexistence

Abstract

The role of configuration mixing in the Pt region is investigated. For this chain of isotopes, the nature of the ground state changes smoothly, being spherical around mass A ∼ 174 and A ∼ 192 and deformed around the mid-shell N = 104 region. Interacting Boson Model with configuration mixing calculations are presented for gyromagnetic factors and isotope shifts. The necessity of incorporating intruder configurations to obtain an accurate description of the latter properties becomes evident.