Measured magnetic moments and shape coexistence in the neutron-deficient nuclei, (sup 184),(sup 186),(sup 188)Pt

摘要

A novel implantation-decay technique has been employed to measure the magnetic moments of the 2(sup +)(sub 1) states in the neutron-deficient nuclei (sup 184)Pt, (sup 186)Pt and (sup 188)Pt. The magnetic moment systematics for the even Pt isotopes now extend from (sup 184)(sub 78)Pt(sub 106) to (sup 198)(sub 78)Pt(sub 120), spanning the upper half of the valence neutron shell. Despite the prolate-to-oblate shape transition near A = 190, they remain remarkably constant. The g(2(sup +)(sub 1)) values for (sup 184,186,188)Pt are consistent with shape-coexistence models in which the deformed configuration has a larger effective number of valence protons than the less-deformed configuration. (Atomindex citation 27:061156)