Quadrupole interaction of 181 Ta in Hf compounds

Abstract
Time-differential angular correlation studies of the electric quadrupole interaction of 181Ta in various Hf compounds are presented. Methods for the analysis of the time spectra are discussed. The experiments yield information on the strength of the quadrupole interaction, and on the axial asymmetry and distribution of the field gradient. Electric field gradients Vzz are derived for 181Ta in Hf metal, HfO2, and (NH4)2HfF6.