Comparison of statistical model calculations for stable isotope neutron capture
Abstract
It is a wellobserved result that different nuclear input models sensitively affect HauserFeshbach (HF) crosssection calculations. Less wellknown, however, are the effects on calculations originating from nonmodel aspects, such as experimental data truncation and transmission function energy binning, as well as codedependent aspects, such as the definition of leveldensity matching energy and the inclusion of shell correction terms in the leveldensity parameter. To investigate these aspects, Maxwellianaveraged neutron capture cross sections (MACS) at 30 keV have been calculated using the wellestablished statistical HauserFeshbach model codes talys and nonsmoker for approximately 340 nuclei. For the same nuclei, MACS predictions have also been obtained using two new HF codes, cigar and sapphire. Details of these two codes, which have been developed to contain an overlapping set of identically implemented nuclear physics input models, are presented. It is generally accepted that HF calculations are valid to within a factor of 3. It was found that this factor is dependent on both model and nonmodel details, such as the coarseness of the transmission function energy binning and data truncation, as well as variances in details regarding the implementation of leveldensity parameter, backshift, matching energy, and giant dipole strength function parameters.
 Publication:

Physical Review C
 Pub Date:
 September 2014
 DOI:
 10.1103/PhysRevC.90.034619
 Bibcode:
 2014PhRvC..90c4619B
 Keywords:

 24.60.Dr;
 25.40.Lw;
 25.70.Gh;
 Statistical compoundnucleus reactions;
 Radiative capture;
 Compound nucleus