Collective excitations of Kr82 observed by in-beam and decay spectroscopy and their characterization by the interacting boson model

R. A. Meyer, J. F. Wild, K. Eskola, M. E. Leino, S. Väisälä, K. Forssten, U. Kaup, and A. Gelberg
Phys. Rev. C 27, 2217 – Published 1 May 1983
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Abstract

A comprehensive investigation of the excited states of Kr82 has been carried out through the γ-ray spectroscopy study of the radioactive decay of Brg82(t12=35.3 h, Jπ=5), Brm82(t12=6.1 min, Jπ=2), Rbg82(t12=1.273 min, Jπ=1+), and Rbm82(t12=6.2 h, Jπ=5) and in-beam studies using the Se80(α, 2nγ)Kr82 reaction. We use the Kr82 level structure we determined, to test the interacting boson model. We show that the interacting boson model calculation can account for the observed levels below 3 MeV provided the underlying shell structure is taken into account. A low energy four quasiparticle ν{p12(g92)723}4 band is proposed and its mixing with the octupole band is discussed.

NUCLEAR REACTIONS Se80(α, 2nγ), measured Eγ, Iγ, γγ coincidence, deduced level energy and Jπ. RADIOACTIVITY Decay of Brg82, Brm82, Rbg82, and Rbm82. Measured Eγ, Iγ, γγ coincidence, deduced level energy and Jπ.

  • Received 4 October 1982

DOI:https://doi.org/10.1103/PhysRevC.27.2217

©1983 American Physical Society

Authors & Affiliations

R. A. Meyer* and J. F. Wild

  • Nuclear Chemistry Division, Lawrence Livermore National Laboratory, University of California, Livermore, California 94550

K. Eskola and M. E. Leino

  • Department of Physics, University of Helsinki, Helsinki, Finland

S. Väisälä

  • Institute of Radiation Protection, Helsinki, Finland

K. Forssten

  • Department of Physics, Åbo Akademi, Åbo, Finland

U. Kaup and A. Gelberg

  • Institut für Kernphysik der Universität zu Köln, Köln, Federal Republic of Germany

  • *Present address (1982-1983): Institut für Kernphysik, KFA-Jülich GmbH Postfach 1913, D-5170 Jülich, Federal Republic of Germany.

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Vol. 27, Iss. 5 — May 1983

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