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Half-lives andP n values of delayed-neutron precursors in the mass chains 85–87, 92, 135, 136 and 145

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

Further results are presented on half-lives and neutron emission probabilities (P n ) of short-lived delayed-neutron precursors in the mass chains 85–87, 92, 135, 136 and 145 obtained with the recoil focussing parabola-type mass separator for unslowed fission products LOHENGRIN installed at the Grenoble high-flux reactor.

A newP n -value of (44±14)% is given for the (0.73±0.06)s87As; theP n -values of seven precursor nuclides have been redetermined: (1.9±0.1)s85As with (22±8)%, 0.9s86As with (10.5±2.2)%, (0.35±0.04)s92Br with (21±8)%, (1.6±0.15)s135Sb with (14±1)%, (0.9±0.1)s136Sb with (19±9)%, (17.5±0.2)s136Te with (2.0±1.0)% and 0.6s145Cs with (12.5±3.0)%. The results are compared with the existing data, and the neutron emission probabilities are discussed within a simple semi-empirical picture.

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Author notes

  1. W. Rudolph

    Present address: NUKEM, D-6450, Hanau, Germany

Authors and Affiliations

  1. Département de Recherche Fondamentale, Laboratoire de Chimie Physique Nucléaire, Centre d'Etudes Nucléaires de Grenoble, Grenoble, France

    J. CranÇon & C. Ristori

  2. Institut für Kernchemie der UniversitÄt Mainz, Mainz, Germany

    H. Ohm, W. Rudolph & K. -L. Kratz

  3. Institut Laue-Langevin, Grenoble, France

    M. Asghar

Authors
  1. J. CranÇon
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  2. C. Ristori
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  3. H. Ohm
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  4. W. Rudolph
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  5. K. -L. Kratz
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  6. M. Asghar
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Additional information

The authors wish to acknowledge the assistance of G.I. Crawford and M. Zendel during a part of the experiments, and helpful discussions with Profs. G. Herrmann, S.G. Prussin and A. Moussa. They also would like to thank the staff of LOHENGRIN for the maintainance of the experimental facilities.

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CranÇon, J., Ristori, C., Ohm, H. et al. Half-lives andP n values of delayed-neutron precursors in the mass chains 85–87, 92, 135, 136 and 145. Z Physik A 287, 45–50 (1978). https://doi.org/10.1007/BF01408359

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  • DOI: https://doi.org/10.1007/BF01408359

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