Shell dependence of the coupling constants for the effective one-body parity nonconserving weak interaction

Abstract

We examine the shell and mass dependence of the coupling constants for the effective one-body parity nonconserving interaction and obtain very little dependence on nuclear mass or on neutron excess. Thus, within a meson-exchange model for the parity nonconserving interaction and a shell model description of heavy nuclei, we find that the constraints placed on the coupling constants from studies in light nuclei also apply to heavy nuclei. In particular, neutron single particle matrix elements of the parity nonconserving interaction larger that a few eV are difficult to obtain within this framework.