Cross section measurements for (n, 2n),(n, α)(n,p), and reactions on rhenium isotopes around 14 MeV neutrons and their theoretical calculations of excitation functions

Cross-section data of the ~(185)Re(n,2 n)~(184)mRe,~(185)Re(n,2 n)~(184)Re,~(185)Re(n,α)~(182 m14+m2+g)Ta,~(187)Re(n2 n)~(186 g,(m))Re,~(187)Re(n,α)~(184)Ta,and ~(187)Re(n,p)~(187)W reactions were measured at four neutron energies,namely 13.5,14.1,14.4,and 14.8 MeV,by means of the activation technique,relative to the reference cross-section values of the~(93)Nb(n,2 n)~(92 m)Nb reaction.The neutrons were generated from the T(d,n)~4 He reaction at the K-400 Neutron Generator at China Academy of Engineering Physics.The induced y activities were measured using a high-resolution γ-ray spectrometer equipped with a coaxial high-purity germanium detector.The excitation functions of the six abovementioned nuclear reactions at neutron energies from the threshold to 20 MeV were calculated by adopting the nuclear theoretical model program system Talys-1.9 with the relevant parameters properly adjusted.The measured cross sections were analyzed and compared with previous experiments conducted by other researchers,and with the evaluated data of BROND-3.1,ENDF/B-Ⅷ.0,JEFF-3.3,and the theoretical values based on Talys-1.9.The new measured results agree with those of previous experiments and the theoretical excitation curve at the corresponding energies.The theoretical excitation curves based on Talys-1.9 generally match mo st of experimental data well.