Calculation of fission yield using fission barrier from optimal shapes of liquid drop model

Abstract

Fission barrier parameter that obtained from the liquid drop model framework does not involve any optimal shapes that based on minimization of liquid drop energy at fixed volume and elongation. In this work, fission yield of 238U and 232Th have been calculated using TALYS nuclear reaction code by implementing fission barrier height that obtained from minimization of liquid drop energy without using any shape parameterization. Fission yield model that has been employed in this calculation was derived from multi modes of random neck rupture model (MM-RNRM) proposed by Brosa et. al. This model is based on Lawrence shapes of deformed nuclei at scission mechanism and has been integrated in TALYS code. The calculation results were compared with the fission yield from ENDF at 0.5 MeV, 10 MeV, and 14 MeV in both cases. The discrepancy between calculation results and ENDF data are probably due to invalid fission parameter that included in the input file.