Integral Measurement Of Spectrum-Averaged Cross Sections O A Few Threshold Reactions Induced By Fast Neutrons Of A Triga Reactor: Comparison With Integrated Data From Excitation Functions Given In Various Data Libraries

Integral cross sections of the reactions Mg-24(n,p)Na-24,Al-27(n,p)Mg-27,Al-27(n,alpha) Na-24, Ni-58 (n,d + np)Co-57 and Ni-60(n,p)Co-60 were measured for the first time using the fast neutron spectrum of a TRIGA reactor extending from 0.5 to 20 MeV. The values obtained in this work were comparable with the recommended values for a pure U-235 prompt fission spectrum. The measured integral value was utilized for integral test of excitation function of each reaction given in some data libraries, namely ENDF/B-VIII.0, TENDL-2017, IRDFF-1.05 and ROSFOND-2010. The integral measurements are generally consistent with the integrated values within 5%, except for a few cases, e.g. the reaction Ni-60(n,p)Co-60, where the data libraries appear to need improvement.