Abstract
Mossbauer experiments have been performed with the 93.3 keV 1/2-5/2 transition in 67Zn metal. The electric field gradient was found to be axially symmetric with a value of eq = +(3.02 ± 0.05) 10J7 V/cm2. The 93.3 keV resonance in G7Zn possesses an extreme sensivity for the measurement of hyperfine interactions. The nuclear Zeeman splitting can be observed in magnetic fields of -100 Oe /l/. The cen ter shifts of the resonance patterns of various zinc chalcogenides /2,3/ which all contain the zinc atom in the +2 oxidation state are very large compared to the line width. The quadrupole interaction of the spin _-?. groundstate of 67Zn (the excited state has I = -L and thus shows no quadrupole splitting) has been thoroughly studied in ZnO /4/. Only incomplete data were available for zinc metal /5/. In this note we report on measurements to determine the electric field gradient in zinc metal. For a source we used 67Ga in Cu. The 6 7Ga
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