The nuclear quadrupole interaction of Ta-181 in the intermetallic compound Hf2Rh

The time differential perturbed angular correlation technique has been used to measure the electric field gradient at Ta-181 impurities in the intermetallic compound Hf2Rh. The results of the measurements show the presence of tare independent quadrupole interactions. At room temperature the interaction frequencies are omega(Q1) = 58 Mrad s(-1) and w(Q2) = 239 Mrad s(-1). The electric field gradient V-zz, the corresponding asymmetry parameter eta and the distribution parameter delta exhibit a pronounced temperature dependence from 78 to 1223 K.