Neutronic Cross Section Calculations on Fluorine Nucleus

Abstract

Certain light nuclei such as Lithium (Li), Beryllium (Be), Fluorine (F) (which are known as FLA degrees BE) and its molten salt compounds (LiF, BeF2 and NaF) can serve as a coolant which can be used at high temperatures without reaching a high vapor pressure. These molten salt compounds are also a good neutron moderator. In this study, cross sections of neutron induced reactions have been calculated for fluorine target nucleus. The new calculations on the excitation functions of F-19(n,2n), F-19(n,p), F-19(n,xn), F-19(n,xp) have been made. In these calculations, the pre-equilibrium and equilibrium effects have been investigated. The pre-equilibrium calculations involve the full exciton model and the cascade exciton model. The equilibrium effects are calculated according to the Weisskopf-Ewing model. Also in the present work, the (n,2n) and (n,p) reaction cross sections have calculated by using evaluated empirical formulas developed by Tel et al. at 14-15 MeV energy. The multiple pre-equilibrium mean free path constant from internal transition have been investigated for F-19 nucleus. The obtained results have been discussed and compared with the available experimental data.