Uncertainty study of nuclear model parameters for the n+ ^{56}Fe reactions in the fast neutron region below 20 MeV

TL;DR

This study assesses the uncertainties in nuclear model parameters for neutron-induced ^{56}Fe reactions below 20 MeV using the Total Monte Carlo method, comparing simulations with experimental data to understand parameter variability.

Contribution

It introduces a comprehensive uncertainty analysis of nuclear model parameters for ^{56}Fe reactions using extensive Monte Carlo simulations and compares results with multiple nuclear data libraries.

Findings

Quantified uncertainties of model parameters for ^{56}Fe reactions.

Identified correlations among optical model parameters.

Generated a large set of random cross section files for further analysis.

Abstract

In this work, we study the uncertainty of nuclear model parameters for neutron induced ^{56}Fe reactions in fast neutron region by using the Total Monte Carlo method. We perform a large number of TALYS runs and compare the calculated results with the experimental data of the cross sections to obtain the uncertainties of the model parameters. Based on the derived uncertainties another 1000 TALYS runs have been performed to create random cross section files. For comparison with the experimental data we calculate a weighted \chi^2 value for each random file as well as the ENDF/B-VII.1, JEFF3.1, JENDL4.0 and CENDL3.1 data libraries. Furthermore, we investigate the optical model parameters correlation obtained by way of this procedure.