Atomic Energy Science and Technology ›› 2018, Vol. 52 ›› Issue (7): 1200-1205.DOI: 10.7538/yzk.2017.youxian.0786

Previous Articles     Next Articles

Measurement and Analysis of Leakage Neutron Spectrum from Gallium Sample

HAN Rui1,2;CHEN Zhiqiang2;NIE Yangbo1;TIAN Guoyu2,3;LUO Fei2,3;SUN Qi2,3;SHI Fudong2;ZHANG Suyalatu4;SONG Lin2,3;ZHANG Xin2,3;RUAN Xichao1;REN Jie1   

  1. 1.Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China; 2.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China; 4.College of Physics and Electronics Information, Inner Mongolia University for the Nationalities, Tongliao 028000, China
  • Online:2018-07-20 Published:2018-07-20

镓样品泄漏中子谱的测量与分析

韩瑞1,2;陈志强2;聂阳波1;田国玉2,3;罗飞2,3;孙琪2,3;石福栋2;张苏雅拉吐4;宋林2,3;张鑫2,3;阮锡超1;任杰1   

  1. 1.中国原子能科学研究院 核物理研究所,北京102413;2.中国科学院 近代物理研究所,甘肃 兰州730000; 3.中国科学院大学,北京100049;4.内蒙古民族大学 物理与电子信息学院,内蒙古 通辽028000

Abstract:

Based on the neutronics integral experimental setup at China Institute of Atomic Energy, the leakage neutron spectra from gallium samples were measured by time-of-flight technique with a BC501A scintillation detector. For the benchmark analysis of the neutron evaluated nuclear data of gallium, the leakage neutron spectra were simulated by MCNP 4C code with the ENDF/B-Ⅶ.1, JEFF-3.2 and TENDL-2015 evaluated nuclear data libraries and compared with experimental data and TALYS code calculated results. The results show that the measured data are well reproduced by simulation with the TENDL-2015 library below the 9 MeV. The calculation results of JEFF-3.2 and TENDL-2015 libraries give better agreement with the measured data in the elastic scattering energy region. For the inelastic scattering peak around 12 MeV, JEFF-3.2 library shows a better agreement with the measured data, and TALYS results indicate that the contribution of discrete levels is dominated contribution.

Key words: gallium, leakage neutron spectrum, neutron evaluated nuclear data, inelastic scattering

摘要:

基于中国原子能科学研究院的中子学积分实验装置,利用BC501A液体闪烁体探测器,结合飞行时间法(TOF)测量了镓样品的泄漏中子谱。采用MCNP 4C程序进行了模拟并与实验泄漏中子谱进行了比较,对ENDF/B-Ⅶ.1、JEFF-3.2、TENDL-2015数据库中镓核中子评价数据进行了宏观基准检验分析,并与TALYS程序计算结果作对比。研究结果显示:在9 MeV以下能区,TENDL-2015库与实验结果符合很好;在弹性散射能区,JEFF-3.2和TENDL-2015库与实验结果符合较好;对于12 MeV左右的非弹性散射峰,JEFF-3.2库与实验结果符合较好,TALYS计算结果显示该部分主要来自镓核分离能级的贡献。

关键词: 镓, 泄漏中子谱, 中子评价数据, 非弹性散射