The Spin-Expansion Hamiltonian and Quadrupole Moments of the Even Os Nuclei

Abstract
The relationship between the various E2 moments of deformed nuclei are derived from a phenomenological model based on a minimum set of assumptions. The quadrupole moments of the lowest 2 + states of the even Os isotopes computed on the basis of this “spin-expansion” Hamiltonian are found to agree with recent muonic X-ray measurements. The spin-dependence of the band mixing parameters, which is not adequately represented by the Kumar-Baranger model, is found to be important in characterizing the heavier Os isotopes.