Abstract
The decay of 251Bk has been studied by radiochemical techniques. The half-life of 55.6 ± 1.1 min agrees with the literature. Relative intensities of γ-rays, including previously unknown γ-rays at 129.9 keV and 163.8 keV, have been determined. The estimated absolute intensity of the γ-ray at 177.7 keV is (5.2 ± 0.6)%. The maximum β-energy has been measured to be 915 ± 10 keV and was used to determine the mass of 251Bk. A decay scheme based on these measurements is given.
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