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TheN=83 nucleus149Dy from Gamow-Teller decay of its 11/2− and 1/2+ 149Ho parents

  • Nuclear Structure and Reactions
  • Published:
Zeitschrift für Physik A Hadrons and Nuclei

Abstract

A high-sensitivityγ-spectroscopic study of the149Hoπh 11/2 andπs 1/2 β-decays using mass separated sources has located dominant 0+ → 1+ GT decay strength associated with decay of pairedh 11/2 protons, leading to 3п-states in the149Dy daughter nucleus. In theirγ-decay low-lying149Dy levels characteristic of anN=83 nucleus are excited. They include theνf 7/2,νp 3/2,νh 9/2 andνp 1/2 single particle- and theνs 2/−11 andνd 2/−13 two-particle one-hole states, as well as the νf 7/2 × 3− andνf 7/2 × 2+ particle-phonon multiplets. A synopsis is given of these excitations in theN=83 isotones from149Nd to153Yb. The149Dy GT decay strength is discussed in terms of the147Tb82 and148Dy82 decays. The strength function results are also compared with independent149Ho 11/2− decay data from the literature based on totalγ-ray absorption measurements.

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Authors and Affiliations

  1. Institut für Kernphysik, Forschungszentrum Jülich, Postfach 1913, D-52425, Jülich, Germany

    R. Menegazzo, P. Kleinheinz, R. Collatz, H. Güven & J. Styczen

  2. Institute of Nuclear Physics, PL-31343, Krakow, Poland

    J. Styczen

  3. Gesellschaft für Schwerionenforschung, D-64291, Darmstadt, Germany

    D. Schardt, H. Keller & O. Klepper

  4. Centre de Recherches Nucléaire, F-67037, Strasbourg, France

    G. Walter & A. Huck

  5. Institut de Physique Nucléaire, F-69622, Villeurbanne, France

    G. Marguier

  6. Physics Department Frescati, Royal Institute of Technology, S-10405, Stockholm, Sweden

    J. Blomqvist

  7. CERN, CH-1211, Genève, Switzerland

    G. Walter, A. Huck & G. Marguier

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  1. R. Menegazzo
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  2. P. Kleinheinz
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  3. R. Collatz
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  4. H. Güven
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  7. H. Keller
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  8. O. Klepper
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  9. G. Walter
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  12. J. Blomqvist
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The ISOLDE collaboration

Additional information

On leave from Technical University, Istanbul, Turkey

We are indebted to K. Zuber, R. Kirchner, and E. Roeckl for invaluable help during the measurements at GSI and for thoughtful comments to this manuscript. One of us (J.S.) acknowledges partial support from the Polish Committee for Research.

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Menegazzo, R., Kleinheinz, P., Collatz, R. et al. TheN=83 nucleus149Dy from Gamow-Teller decay of its 11/2− and 1/2+ 149Ho parents. Z. Physik A - Hadrons and Nuclei 349, 13–24 (1994). https://doi.org/10.1007/BF01296328

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  • DOI: https://doi.org/10.1007/BF01296328

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