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Level structure of 14968 Er81 and high-spin isomerism in proton-richN=81, 82, 83 nuclei

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Zeitschrift für Physik A Atomic Nuclei

Abstract

The level structure of theN=81 nucleus149Er has been studied by γ-ray spectroscopy following the reaction92Mo+255 MeV60Ni. Yrast levels in149Er are established up to ~3.3 MeV, including 0.61 and 4.8 μs isomeric states. Most of the observed levels are interpreted as seniority-three states arising from the coupling of s1/2, d3/2 and h11/2 neutron holes with πh 2/n11 . Isomers identified in the reaction96Ru+255 MeV58Ni are tentatively assigned to151Yb. TheB (E2) values of high-spin isomers inZ=66−70,N=81−83 nuclei are surveyed.

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Author notes

  1. R. Broda

    Present address: Institute of Nuclear Physics, PL-31342, Cracow, Poland

  2. J. McNeill

    Present address: Physics Department, University of Manchester, M13 9PL, UK

  3. D. C. Radford

    Present address: Chalk River Nuclear Laboratories, KOJ IJO, Chalk River, Ontario, Canada

Authors and Affiliations

  1. Chemistry Department, Purdue University, W. Lafayette, Indiana, USA

    R. Broda, P. J. Daly & J. McNeill

  2. Physics Division, Argonne National Laboratory, Argonne, Illinois, USA

    R. V. F. Janssens & D. C. Radford

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  1. R. Broda
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  2. P. J. Daly
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  3. J. McNeill
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  4. R. V. F. Janssens
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  5. D. C. Radford
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Additional information

Work supported by the U.S. Department of Energy under Contract Nos. DE-AC02-76ER01672 and W-31-109-Eng-38

We thank J. Blomqvist and R.D. Lawson for useful discussions.

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Broda, R., Daly, P.J., McNeill, J. et al. Level structure of 14968 Er81 and high-spin isomerism in proton-richN=81, 82, 83 nuclei. Z. Physik A - Atomic Nuclei 327, 403–408 (1987). https://doi.org/10.1007/BF01289565

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  • DOI: https://doi.org/10.1007/BF01289565

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