Ground-state β-branching intensities of several fission-product isotopes measured using a total absorption γ-ray spectrometer

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Abstract

The final set of results of “ground-state” β-branching intensities obtained in a program of systematic study of those regions of the fission-product nuclides accessible to investigation using the 252Cf-based INEL ISOL facility are presented. A total absorption γ-ray spectrometer, operating in a 4πγ-β coincidence mode, was used to obtain these “ground-state” β-branching intensities; where here the “ground-state” is defined to include all states below a selected γ-ray discriminator level. Results obtained for 89Rb, 90gRb, 91Rb, 93Rb, 93Sr, 94Sr, 94Y, 95Sr, 95Y, 140Cs, 142La, 143Ba, 143La, 144Ba, 144La, 145Ba, 145La, 146Ce, 146Pr, 147Ce, 147Pr, 148Ce, 148Pr, (2.27 min), 149Pr, 149Nd, 151Pr, 151Nd, 152Pm (4.1 min), 153Nd, 155Nd, 157Pm, 157Sm, 158Sm and 158Eu are presented and compared with existing published data.

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    1

    Retired from Idaho National Engineering Laboratory, Idaho Falls, ID 83415-2114, USA.

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