Abstract
Hauser-Feshbach (HF) cross sections are of enormous importance for a wide range of applications, from waste transmutation and nuclear technologies, to medical applications, and nuclear astrophysics. It is a well-observed result that different nuclear input models sensitively affect HF cross section calculations. Less well known however are the effects on calculations originating from model-specific implementation details (such as level density parameter, matching energy, back-shift and giant dipole parameters), as well as effects from non-model aspects, such as experimental data truncation and transmission function energy binning. To investigate the effects or these various aspects, Maxwellian-averaged neutron capture cross sections have been calculated for approximately 340 nuclei. The relative effects of these model details will be discussed.
Highlights
Nuclear reaction rates are crucial to a spectrum of applications, including waste transmutation, nuclear technologies, and the production of isotopes for medical applications
Both codes reproduce the experimental MACS to within a factor of roughly 3, though larger deviations are visible around the closed shells
The impact of the coarser energy binning in CIGAR is visible for nuclei with neutron numbers less than 40, where large differences between SAPPHIRE and CIGAR calculations are evident
Summary
Nuclear reaction rates are crucial to a spectrum of applications, including waste transmutation, nuclear technologies, and the production of isotopes for medical applications. Nuclear reactions are the primary ingredient in nucleosynthesis studies Are they of the utmost importance for understanding how stars produce energy, they are the key to understanding the origin and observed abundance pattern for the vast majority of elements. The results from the codes were compared to approximately 340 Maxwellian-averaged cross section data (MACS) compiled in the KADoNiS [10] database. Of these 4 codes, CIGAR and SAPPHIRE have been developed to use identical nuclear input models, implemented with exactly the same details (e.g., identical level density and back shift parameter, identical spin-cut off model etc). EPJ Web of Conferences malisms means that effects from non-model and coding details can be investigated
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