# 2019 Symposium on Nuclear Data 2019年度核データ研究会

28-30 November 2019
C-CUBE, Kyushu University Chikushi Campus 九州大学筑紫キャンパス総合研究棟 (C-Cube)
Asia/Tokyo timezone
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# Fission study using four-dimensional Langevin model - Nuclear shape of fission fragments

• Xuan ZHANG

## Abstract

The precise data on prompt neutron multiplicity and prompt neutron spectrum of nuclear fission are necessary for nuclear reactor designs. We plan to calculate these data by simulation based on 4D Langevin Model. The excitation energy of each fission fragment at scission directly determines the prompt neutron multiplicity. Deformation energy should be the main term of excitation energy. In this study, we make it posible to precisely calculate the deformations, Quadrupole Moment ($Q_{20}$) and Octupole Moment ($Q_{30}$), of each fission fragment at scission by using 4D Langevin Model. After systematic survey of Actinides, we find that the deformations of light fragments are larger than heavy fragments. Also, the mass number dependence of deformations of fission fragments shows a sawtooth structure which is similar to prompt neutron multiplicity.