Abstract
$^{111}\mathrm{In}$ was implanted into intrinsic germanium. After removal of the radiation damage by thermal annealing of the samples the hyperfine interaction of the daughter nucleus $^{111}\mathrm{Cd}$ was studied as a function of temperature in the range 20--300 K by use of the time-differential perturbed angular correlation technique. While at room temperature all the probes are in sites of nearly cubic symmetry, at low temperature almost all of them are subject to hyperfine interactions. These interactions can be understood in terms of a fluctuating electric field gradient. These fluctuations can be described with the Abragam and Pound model. The attenuation parameter depends linearly on 1/T. The present results are compared with those reported for similar experiments carried out in silicon.
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