Calculation of the energy dependence of fission fragments yields and kinetic energy distributions for neutron-induced ^(235)U fission  

作　　者：Ya-Ning Han Zheng Wei Yi-Xuan Wang Dong-Ying Huo Peng-Qi Zhang Ming Li Jun Ma Kang Wu Yong-Guang Zheng Yuan He Zhi-Yong Deng Tian-Zhi Jiang Xiang-Lin Zhuo Jin Li Yun Zhang Yu Zhang Jun-Run Wang Xiao-Dong Su Ze-En Yao 韩亚宁;韦峥;王艺璇;霍东英;张鹏琦;李明;马骏;吴康;郑永光;何源;邓志勇;蒋天植;卓祥林;李进;张芸;张宇;王俊润;苏小东;姚泽恩

机构地区：[1]School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China [2]Engineering Research Center for Neutron Application Technology,Ministry of Education,Lanzhou University,Lanzhou 730000,China [3]MOE Frontiers Science Center for Rare Isotopes,Lanzhou University,Lanzhou 730000,China [4]School of Mathematics and Statistics,Lanzhou University,Lanzhou 730000,China [5]Nuclear Power Institute of China,Chengdu 610000,China

出　　处：《Chinese Physics C》2024年第8期159-169,共11页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(12075105);the NSFC-Nuclear Technology Innovation Joint Fund(U2167203);the Major Science and Technology Projects of Gansu Province(22ZD6GB020);the Fundamental Research Funds for the Central Universities of China(lzujbky-2022-ey14,Izujbky-2022-kb07)。

摘　　要：Fission fragments yields and average total kinetic energy are fundamental nuclear data for nuclear energy applications and the study of nuclear devices.Certain fission products,such as ^(95)Zr,^(99)Mo,^(140)Ba,^(144)Ce,and ^(147)Nd,serve as burnup monitors,assessing the number of fissions induced by neutrons on ^(235)U.However,current experimental data for these fission products worldwide are inconsistent,introducing significant uncertainty into related scientific research.In this study,we employed the Potential-driving Model to calculate the independent yields of ^(235)U and evaluate its advantages in such calculations.Additionally,we investigated the energy dependence of independent yields to select important products.Furthermore,we calculated the cumulative yields of ^(95)Zr,^(99)Mo,^(140)Ba,^(144)Ce,and ^(147)Nd,and compared them with existing literature data to explore the energy dependence of fission products for ^(235)U.Given the lack of fission product yield data above 14.8 MeV,we extended our calculated incident neutron energy to 20 MeV,aiming to support future scientific research.The Geant4 physical model does not consider the influence of incident neutron energy on the average total kinetic energy of fission fragments;thus,we introduced the excitation function of the total kinetic energy of fission fragments recommended by Madland et al.,which effectively describes the experimental data of the average total kinetic energy of fragments formed in ^(235)U fission.In this paper,we comprehensively discuss the energy dependence of fission product yields and average total kinetic energy.

关 键 词：^(235)U(n f) potential-driving model fission yields kinetic energies energy dependence 

分 类 号：O571.5[理学—粒子物理与原子核物理]