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30 keV (n, γ) cross-sections from the nuclear statistical model

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Abstract

Global input parameters for a Hauser-Feshbach calculation of astrophysical nuclear reaction rates are evaluated; wherever possible they are expressed as systematic functions of nucleon numbersN andZ rather than mass numberA. Average (n, γ) cross-sections at 30 keV are calculated for all stable nuclei and nuclei with lifetimes ≥ 1 yr, taking into account the effects of width fluctuations. Agreement with experimental results is generally obtained to within 70%, but systematic discrepancies arise for even-even target nuclei between neutron shell closuresN=50 andN=82. A σN curve for thes-process nuclei is in good agreement with theoretical predictions, except for a possible anomalous peak aroundA=180.

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Author notes

  1. M. J. Harris

    Present address: W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, Calif., USA

Authors and Affiliations

  1. Nuclear Physics Division, AERE, Harwell

    M. J. Harris

  2. Dept. of Astrophysics, University of Oxford, England

    M. J. Harris

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Harris, M.J. 30 keV (n, γ) cross-sections from the nuclear statistical model. Astrophys Space Sci 77, 357–367 (1981). https://doi.org/10.1007/BF00649465

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