Cross-Section Calculation of (n, p) and (n, 2n) Reactions for High Temperature Reactors Construction Materials Tungsten and Rhenium

Abstract

In this study, cross-section calculations for (n, 2n) and (n, p) reactions of Tungsten isotopes and Rhenium isotopes have been investigated using different level density options up to 20 MeV. The TALYS-1.95, EMPIRE-3.2 (Malta) and ALICE-ASH computer codes, extensively used for nuclear data evaluation, have been used in our calculations. For calculations the Fermi-gas level density (FGM) and the superfluid nuclear model ( S FM) have been selected for ALICE code. The enhanced generalized superfluid model (EGSM), the generalized superfluid model (GS FM), and the Hartree-Fock-Bogoliubov microscopic model (HFBM) have been used from EMPIRE-3.2 (Malta) code. In addition, the constant temperature + Fermi-gas model (CTFGM), the Back-shifted Fermi gas model (BS FGM), the generalized superfluid model (GSM), and microscopic level density model (Skyrme force) according to Goriely's tables have been selected for calculations from TALYS -1.95 codes. Results of calculations have been discussed and compared with several experimental values taken from EXFOR data library and evaluated data file of TENDL-2019 and ENDFB-VIII.0 (USA, 2018) libraries to see their effects on the reaction cross sections. It is seen that results from the calculated cross-section data from nuclear reaction models are generally in agreement with the experimental data and the evaluation data around 14.5 MeV. We believe that the present calculated results contribute significantly to enhance the knowledge of cross sections.