Elsevier

Nuclear Physics A

Volume 404, Issue 1, 1 August 1983, Pages 1-14
Nuclear Physics A

Features of the β-decay of 93mRu to proton emitting states in 93Tc

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Abstract

The 10.8 s, 12 isomer of 93Ru is shown to be a β-delayed proton precursor. The absolute branching ratio for this decay mode is determined to be (2.7 ± 0.5) × 10−4. The measured total decay energy of 93mRu is 7.070 ± 0.085 MeV. The delayed proton spectrum has prominent peaks at 2.481, 2.534 and 2.557 MeV, indicating structural effects in the β-strength distribution. This structure is discussed in terms of a πg92 → vg72 spin-flip transition across the closed N = 50 nucleon shell. The level structure of 93Tc was also studied by the 92Mo(p, γ)93Tc resonance reaction in the proton energy range 2.00 MeV < Ep < 2.68 MeV. Individual resonances were well resolved in the energy region studied. The proton binding energy of 93Tc was measured to be 4086.5 ± 1.0 keV.

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    Present address: Lawrence Berkeley Laboratory, Berkeley, California 94720, USA.

    ††

    On leave-from: Institute of Nuclear Research, Warsaw, Poland.

    †††

    Temporary address: Los Alamos National Laboratory, New Mexico 87545, USA.

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