Electric quadrupole interaction and its temperature variation at 100Rh in Be metal

The nuclear quadrupole interaction at the 100Rh probe nucleus in a Be host is measured from 4.2-968 K using time-differential perturbed γ-γ angular correlations of the 84-75 keV cascade in the de-excitation of 100Rh. The sources were prepared by recoil-implanting the parent 100Pd activity produced in a heavy-ion reaction. The temperature variation of the electric field gradient can nicely be fitted by a Tsup(3/2) law. We discuss the electric field gradient and its temperature dependence in the light of various systematics. The data are also compared with the predictions of the conduction electron charge shift model suggested by Bodenstedt and Perscheid. (orig.)