广西师范大学学报（自然科学版） ›› 2012, Vol. 30 ›› Issue (3): 64-70.

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中低能中子诱发238U裂变的碎片质量分布

孙小军, 余呈刚, 王宁   

  1. 广西师范大学物理科学与技术学院,广西桂林541004
  • 收稿日期:2012-05-24 出版日期:2012-09-20 发布日期:2018-12-04
  • 通讯作者: 孙小军(1973—),男,江西吉水人,广西师范大学教授,博士。E-mail:sxj0212@gxnu.edu.cn
  • 作者简介:孙小军,教授,江西吉水人,1999—2002年于广西师范大学攻读理论物理专业硕士学位,并于2002年留校任教至今;2004—2007年于中国原子能科学研究院攻读粒子物理与原子核物理专业博士学位,2007年获副教授职称;2008—2010年于厦门大学固体表面物理化学国家重点实验室从事博士后科研工作,2010年获教授职称。
  • 基金资助:
    广西自然科学基金资助项目(2012GXNSFAA053008);中国科学院战略先导专项(钍基熔盐堆核能系统);国防工业科技发展计划(B0120110034)

Pre-neutron-emission Mass Distributions for Neutron-induced 238U Fission at Low and Intermediate Energies

SUN Xiao-jun, YU Cheng-gang, WANG Ning   

  1. College of Physical Science and Technology,Guangxi Normal University,Guilin Guangxi 541004,China
  • Received:2012-05-24 Online:2012-09-20 Published:2018-12-04

摘要： 乏燃料中238U含量最多(高达95％),研究中子诱发238U裂变产物的分布特性对乏燃料的循环后处理具有非常重要的意义。本文基于微观和唯象方法的裂变势模型理论,研究入射能量从0.9 MeV—60.0 MeV能区的中子诱发238U裂变反应的发射中子前碎片质量分布,结果表明:在中能区,理论计算结果能很好地重现实验数据,甚至比国际著名的TALYS理论计算的结果要好;在低能区,理论计算结果也较为合理,并分析了与实验数据有所偏差的原因。

关键词: 238U, 中子诱发裂变反应, 裂变势, 碎片质量分布

Abstract: 238U,of which abundance is almost 95%,is one ofthe most important isotopes of the spent nuclear fuel.The study of neutron-induced 238U fission is in favor of the cycle processing of the spentfuel.Based on the microscopic and phenomenological approach,the pre-neutron-emissionmass distributions of neutron-induced 238U fission at incident energies from 0.9 to 60 MeV have been studied with the fission potential theory proposed in previous paper.The calculated results could well reproduce the experimental data,and are even better thanthat of the famous TALYS code at intermediate energies.The results can also reasonably predict the distributions at the vibrationalresonances,and the deviation between the experimental and the theoretical datais also analyzed.

Key words: 238U, neutron-induced fission, fission potential, pre-neutron-emission mass distribution

中图分类号: 

  • O571.43
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