The calculation of (n,f) cross sections for some heavy nuclei

In this study, cross section of 230,232Th, 231-233Pa, 234-238U and 236-244Pu have been calculated. Fission cross sections compared with experimental values. ALICE-ASH and CEM95 computer programs was used for calculations. Calculations have been studied by 1-20 MeV incident energy neutrons. In CEM95 calculations, all sistematics of level density parameters (IFAM) was used for each of nuclei. Single-humped fission barrier sistematics (NHUMP) was used in CEM95 calculations. The sistematics of Barashenkov were used for macroscopic fission barier (IB) and exciton energy dependence of fission barier (IBE) in CEM95. In ALICE-ASH calculations, hybrid and geometry dependent hybrid model for pre-equilibrium state of nucleons, Weisskopf-Ewing model for equilibrium state was used. Rotating finite range barrier sistematics and rotating liquid drop barrier sistematics was used by using the ALICE-ASH.