Transient field measurements of g-factors in 194,196,198Pt; g(21+) systematics in transitional W, Os, Pt nuclei

Transient field precessions were measured simultaneously for levels in the nuclei 182,184,186W and 194,196,198Pt as their ions traversed polarized Gd hosts. These results allow a critical evaluation of conflicting g-factor values reported previously for the even Pt isotopes. Mass variations of g(21+) in the even W, Os, Pt nuclei are examined using the proton-neutron interacting boson model (IBM-2). The measrued g-factor depart from the simplest IBM-2 description perhaps due to subshell effects and/or small contributions from non-collective configurations which cause the neutron boson g-factor to vary with mass. (orig.)