The Branching Ratio of Kr85m from Fission Yield Studies

Abstract
To J. Mattauch for his 60th birthday The fission yield of the 85 mass chain has been determined both at Kr and Rb with a mass spectrometer using isotope dilution techniques. This has made possible a direct determination of the branching ratio of Kr85m which turns out to be 0.28. Thus 22°/o of the metastable isomer (Kr85m) decays to the Kr85 ground state.

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