Shell-model predictions for electromagnetic properties of N=50 nuclei.

Abstract

Predictions for E2, M1, and M4 transition rates and moments, together with examples of transition-charge densities, are presented for states of N=50 nuclei. These predictions are based on one-body spectroscopic amplitudes obtained from the wave functions of a new N=50 shell-model calculation which incorporates the 0${f}_{5/2}$, 1${p}_{3/2}$, 1${p}_{1/2}$, and 0${g}_{9/2}$ single-particle orbits and an empirically determined effective Hamiltonian for this space. The predictions are compared with experimental data, first in order to evaluate how well the model space, as applied by this Hamiltonian, accounts for observations, and then to assess the importance of configurations excluded from the model space and to determine the values of the operator renormalizations (effective charges and effective g factors) which optimally map the theoretical results onto the corresponding experimental values.