The half-life of Ni63 has been found by a specific activity determination to be 125 ± 6 years. The number of atoms of Ni63 was determined mass spectrometrically and the disintegration rate by 4πβ-counting. The cross section for the reaction Ni62(n, γ)Ni63 has been found to be 21 ± 2 barns, in good agreement with that found by Pomerance.
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McMullen et al. (1956) studied this question.
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