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Isomers having half-lives of a few hours have been photoactivated by 60Co γ-ray irradiation. The γ-rays emitted from isomers were measured with a low-background Ge detector. The decay data were analyzed by both least-squares method and maximum likelihood method and the suitability of the latter method is discussed. The obtained half-lives are: 87mSr: 2.811 ± 0.027 h, 111mCd: 48.30 ± 0.15 min, 113mIn:...
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