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Double neutron capture in62Ni

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

The γ-radiation following single and double neutron capture in isotopically enriched62Ni was studied at the high flux reactor of the Institut Laue-Langevin, using a pair and Compton suppressed germanium detector. Measurements before and after 170 d of breeding were performed. The γ-ray fluxes through63Ni and64Ni are discussed; several new levels and spin-parity assignments were found. On the basis of the known discrete levels and the low-energy neutron resonances, level density parameters were determined within the Constant Temperature Fermi Gas model. The neutron binding energies were measured asB n (63Ni)=6837.92(18) keV andB n (64Ni)=9657.64(24) keV. The63Ni (n, γ) cross section for reactor neutrons was measured to be σ=20 +5−2 b.

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Authors and Affiliations

  1. II. Physikalisches Institut, Universität Göttingen, Bunsenstrasse 7, W-3400, Göttingen, Federal Republic of Germany

    A. Harder, S. Michaelsen, A. Jungclaus & K. P. Lieb

  2. Institut Laue-Langevin, F-38042, Grenoble, France

    A. P. Williams & H. G. Börner

  3. Physik-Department, Technische Universität München, James-Franck-Strasse, W-8046, Garching, Federal Republic of Germany

    M. Trautmannsheimer

Authors
  1. A. Harder
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  2. S. Michaelsen
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  3. A. Jungclaus
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  4. K. P. Lieb
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  5. A. P. Williams
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  6. H. G. Börner
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  7. M. Trautmannsheimer
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Additional information

Supported by Deutsches BMFT under contract 06 GÖ 141

We are grateful to Dr. S.J. Robinson for his help in the initial stage of the experiment.

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Harder, A., Michaelsen, S., Jungclaus, A. et al. Double neutron capture in62Ni. Z. Physik A - Hadrons and Nuclei 343, 7–14 (1992). https://doi.org/10.1007/BF01291590

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  • DOI: https://doi.org/10.1007/BF01291590

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