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VOLUME 31 (1980) | ISSUE 10 | PAGE 596
Effect of the width of the exciting γ-ray spectrum on the average precession time of excited nuclei in a magnetic field
The average precession time of 91Ir nuclei in a magnetic field, which are excited by means of Mossbauer absorption of γ rays, exceeds the average lifetime of these nuclei in the excited state, which is defined as r = ή/Γ. Allowance for the width of the exciting y-ray spectrum gives a g factor of the 129.4-keV level equal to 0.197 ± 0.018, in agreement with the data of other experiments.