30KEV / nu, Gamma / CrossSections from the Nuclear Statistical Model
Abstract
Global input parameters for a HauserFeshbach 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) crosssections 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 eveneven target nuclei between neutron shell closuresN=50 andN=82. A σN curve for thesprocess nuclei is in good agreement with theoretical predictions, except for a possible anomalous peak aroundA=180.
 Publication:

Astrophysics and Space Science
 Pub Date:
 July 1981
 DOI:
 10.1007/BF00649465
 Bibcode:
 1981Ap&SS..77..357H
 Keywords:

 Astronomical Models;
 Gamma Ray Astronomy;
 Neutron Cross Sections;
 Nuclear Fusion;
 Radiative Transfer;
 Reaction Kinetics;
 Density Distribution;
 Distribution Functions;
 Neutron Emission;
 Nuclei (Nuclear Physics);
 Statistical Analysis;
 Astrophysics