Nuclear Science and Engineering / Volume 21 / Number 3 / March 1965 / Pages 325-328
Technical Paper / dx.doi.org/10.13182/NSE65-A20036
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A more precise value of the half-life of U235, for alpha emission, has been determined from an analysis of the alpha spectrum of natural uranium. The alpha spectrum was measured using solid-state detectors and the half-life obtained by a comparison of the intensity of the resolved portion of the U235 alpha spectrum with the intensities of the U234 and U238 alpha groups. The value obtained was T1/2 = (6.92± 0.09) × 108 years.