Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (6): 60503-060503.doi: 10.11889/j.0253-3219.2018.hjs.41.060503


Calculation and simulation on the fission products for neutron-induced 239Pu fission based on Potential-driving model

LI Kejun1, WEI Zheng1,2, LIU Changqi1, MA Zhanwen1, HUANG Zhiwu1, ZHANG Shuangjiao1, HAN Chao1, ZHANG Yu1,2, LU Xiaolong1,2, WANG Junrun1,2, YAO Zeen1,2   

  1. 1 School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;
    2 Engineering Research Center for Neutron Application, Ministry of Education, Lanzhou University, Lanzhou 730000, China
  • Received:2018-01-19 Revised:2018-02-14 Online:2018-06-10 Published:2018-06-06
  • Supported by:
    Supported by National Natural Science Foundation of China Youth Science Foundation Project (No.11705071), Fundamental Research Funds for the Central Universities (No.lzujbky-2017-13, No.lzujbky-2017-kb09)

Abstract: [Background] At present, high-precision fission nuclear data of fast neutron-induced 239Pu(n,f) reaction is required for the study of new-generation nuclear systems.[Purpose] Based on the proposed Potential-driving model in the earlier study, the calculation and simulation methods are developed to predict the fission product data for 239Pu(n,f) reaction in this paper.[Methods] The driving potential distribution and pre-neutron-emission mass distribution for 239Pu(n,f) reaction are calculated based on the Potential-driving model. In addition, the Potential-driving model is implanted in the GEANT4 code for simulating the physical process of 239Pu(n,f) reaction. The mass distribution and the charge distribution of independent and cumulative yield, the fission-fragment kinetic energy distribution and the fission neutron spectrum of post-neutron-emission for D-T neutron-induced 239Pu(n,f) reaction are presented. Average total kinetic energy of the fission-fragment for 239Pu(n,f) reaction as a function of the incident neutron energy is also shown.[Results] The calculated and simulated results in the Potential-driving model are compared with the experimental data, the evaluated data from ENDF/B-VⅡ.1 and the simulated data based on the G4ParaFissionModel. It is found that the results calculated by the Potential-driving model are in good agreement with the experimental data and the ENDF/B-VⅡ.1 evaluated data, are better than those data calculated by the G4ParaFissionModel.[Conclusions] The Potential-driving model can well describe the post-fission physical process for 239Pu(n,f) reaction. It is a more reliable method for the study on fission-product nuclear data of fast neutron-induced 239Pu(n,f) reaction.

Key words: Potential-driving model, Neutron-induced 239Pu (n,f) reaction, Yield distribution, Kinetic energy distribution, Fission neutron spectrum

CLC Number: 

  • O571.5