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The 1-(1.9 MeV β-)2+ transition in the decay of148Pm

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

The non-unique first-forbidden 1−(1.9 MeVβ −)2+ transition in the decay of148Pm is studied. The nuclear matrix elements are evaluated using for the ground state of the odd-odd148Pm a phenomenological wave function derived in a previous work in the framework of the two-quasiparticle model and assuming that the first excited 2+ state in148Sm can be described as the first quadrupole phonon state. This model provides nuclear matrix elements which are capable of describing experimental data like the spectrum shape factor, the longitudinal polarization of the electrons and a particular set ofβ-γ directional correlation coefficients, but it fails to interpret the large logft value of this transition. In addition, the validity of theξ-approximation is discussed.

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Authors and Affiliations

  1. Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina

    O. A. Rosso (Fellow of the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) of Argentina)

  2. CONICET, Argentina

    L. Szybisz (Fellow of the Alexander von Humboldt Foundation. Member of the Carrera del Investigador Científico)

  3. Institut für Theoretische Physik, Universität zu Köln, Germany

    L. Szybisz (Fellow of the Alexander von Humboldt Foundation. Member of the Carrera del Investigador Científico)

Authors
  1. O. A. Rosso
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  2. L. Szybisz
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Additional information

On leave of absence from Departamento de Fisica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 1900 La Plata, Argentina

The authors are grateful for the kind hospitality afforded to them at the Departamento de Física of the Comisión Nacional de Energía Atómica, Argentina, where part of the computational task was performed.

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Rosso, O.A., Szybisz, L. The 1-(1.9 MeV β-)2+ transition in the decay of148Pm. Z Physik A 311, 119–126 (1983). https://doi.org/10.1007/BF01411616

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  • DOI: https://doi.org/10.1007/BF01411616

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