Abstract
The electric quadrupole hyperfine interactions for 181Hf/181Ta and for 111In/111Cd probes in polycrystalline Zr3Al2 and Hf3Al2 compounds were measured in the temperature range 24–1100 K. The hyperfine quadrupole interaction parameters were determined after different doping techniques and heat treatments of the samples.181Hf/181Ta was found to substitute the Hf/Zr sites and the 111In/111Cd impurities appear to substitute both the 8(j) Al sites and the three nonequivalent Hf/Zr sites.
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