Proton-Induced Fission Cross Section Calculation with the LANL Codes CEM2K+GEM2 and LAQGSM+GEM2

TL;DR

This paper improves and validates computational models CEM2k+GEM2 and LAQGSM+GEM2 for accurately calculating proton-induced fission cross sections across a wide energy range, with successful tests on various reactions.

Contribution

The paper introduces modifications to existing nuclear reaction models to reliably predict proton-induced fission cross sections from 20 MeV to 10 GeV, validated against experimental data.

Findings

Accurately describes experimental fission cross sections for protons from 20 MeV to 10 GeV.

Successfully extends the models to reactions induced by neutrons, pions, and photons.

Adjusts two parameters in GEM2 for each reaction to fit experimental data.

Abstract

The improved Cascade-Exciton Model code CEM2k and the Los Alamos version of the Quark-Gluon String Model code LAQGSM, previously merged with the Generalized Evaporation Model code of Furihata (GEM2) were further modified to provide reliable proton-induced fission cross sections for applications. By adjusting two parameters in GEM2 for each measured reaction, we were able to describe very well with CEM2k+GEM2 and LAQGSM+GEM2 all available experimental fission cross sections induced by protons with energies from 20 MeV to 10 GeV both for subactinide and actinide targets. We also successfully tested our approach on several reactions induced by neutrons, pions, and photons.