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Beta-decay of 27/2− isomers inN=83 nuclei

  • Nuclear Structure and Spectroscopy
  • Published:
Zeitschrift für Physik A Atomic Nuclei

Abstract

In theN=83 nucleus151Er we observed the isomericE3 transition in conversion electron measurements following on-line mass separation and located its 0.6 s 27/2− isomer at 2.586 MeV. Gamma-ray data establish a 4.7(3)% Gamow-Tellerβ-decay branch proceeding to high-spin states above 2 MeV excitation in151Ho. A weakβ-decay branch of 0.7(3)% was also observed for the 0.5 s 27/2− isomer in the149Dy isotone, and it was established that a similar 27/2− E3-isomer does not occur in153Yb. First results on the151Tm and151Er ground-stateβ-decays are briefly discussed.

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Authors and Affiliations

  1. Gesellschaft für Schwerionenforschung, Darmstadt, Federal Republic of Germany

    R. Barden, A. Plochocki, D. Schardt, R. Kirchner & O. Klepper

  2. Institut für Kernphysik, KFA Jülich, Federal Republic of Germany

    B. Rubio, M. Ogawa & P. Kleinheinz

  3. Forskningsinstitutet för Atomfysik, Stockholm, Sweden

    J. Blomqvist

  4. Research Institute of Physics, S-10405, Stockholm 50, Sweden

    J. Blomqvist

Authors
  1. R. Barden
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  2. A. Plochocki
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  3. D. Schardt
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  4. B. Rubio
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  5. M. Ogawa
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  6. P. Kleinheinz
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  7. R. Kirchner
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  8. O. Klepper
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  9. J. Blomqvist
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Additional information

This work is part of the doctoral dissertation of R. Barden, to be submitted to Johannes Gutenberg-Universität Mainz

On leave from Tokyo Institute of Technology, Nagatsuda, Japan

We thank Ch. Bruske, K.H. Burkard and W. Hüller for operation of the on-line separator and the Unilac crew for developing high-quality64Zn-beams which were vital for our measurements. For fruitful advise and productive discussions we are indebted to E. Roeckl and O. Schult.

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Barden, R., Plochocki, A., Schardt, D. et al. Beta-decay of 27/2− isomers inN=83 nuclei. Z. Physik A - Atomic Nuclei 329, 11–20 (1988). https://doi.org/10.1007/BF01294811

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  • DOI: https://doi.org/10.1007/BF01294811

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