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Intense mass-separated beams of halogens and beta-delayed neutron emission from heavy bromine isotopes

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

Improved production yields of short-lived halogens were obtained from a ThO2 target, irradiated with 600 MeV protons, in combination with a negative surface ionization source. Mass-separated samples were studied by decay spectroscopy. Production yields of radioactive isotopes of chlorine, bromine, iodine and astatine are presented. Half-lives and relative neutron emission probabilities were measured for the heavy bromine isotopes89−92Br. Normalizing to earlier publishedP n values for89Br, the results are:89Br (4.30±0.14s,P n =13.6±0.8%),90Br (1.92±0.06s,P n =24.8±1.5%),91Br (0.53 ±0.03 s,P n =30.1 ±2.1%), and92Br (0.31 ±0.02 s,P n =34.6±2.5%). Energy spectra ofβ-delayed neutrons were measured.

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Authors and Affiliations

  1. Physics Department, Queens University, Kingston, Ontario, Canada

    G. T. Ewan

  2. CERN-ISOLDE, Geneva, Switzerland

    P. Hoff, B. Jonson & H. L. Ravn

  3. Department of Physics, Chalmers University of Technology, Göteborg, Sweden

    B. Jonson, P. O. Larsson & G. Nyman

  4. Institut für Kernchemie, Universität Mainz, Germany

    K. -L. Kratz & W. Ziegert

  5. Gesellschaft für Schwerionenforschung, Darmstadt, Germany

    P. O. Larsson

Authors
  1. G. T. Ewan
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  2. P. Hoff
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  3. B. Jonson
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  4. K. -L. Kratz
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  5. P. O. Larsson
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  6. G. Nyman
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  7. H. L. Ravn
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  8. W. Ziegert
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The ISOLDE collaboration, CERN

Additional information

Two of us (K.-L. K., W. Z.) would like to acknowledge financial support from the Bundesministerium für Forschung und Technologie.

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The ISOLDE collaboration, CERN., Ewan, G.T., Hoff, P. et al. Intense mass-separated beams of halogens and beta-delayed neutron emission from heavy bromine isotopes. Z Physik A 318, 309–314 (1984). https://doi.org/10.1007/BF01418088

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  • DOI: https://doi.org/10.1007/BF01418088

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