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重力场中子小角散射Q分辨函数计算方法
引用本文:彭梅,孙良卫,陈良,李新喜.重力场中子小角散射Q分辨函数计算方法[J].现代科学仪器,2009(4):73-75.
作者姓名:彭梅  孙良卫  陈良  李新喜
作者单位:中国工程物理研究院核物理与化学研究所,四川绵阳,621900
摘    要:中子小角散射由于散射路径较长,中子飞行过程中重力的影响不能被忽略。通过vitess程序模拟证实了重力对Q的贡献,并通过解析计算,在单束准直长度L1=L2=12m、Q为0.1nm^-1时候,得到了重力场中子小角散射口分辨函数:QG达到实际散射矢量的0.95%,修正计算得到的Q0值比实际散射矢量增加约0.2%,Q分辨函数宽度为6.7%,表明计算后得到的Q0值更接近于真实矢量值。本文研究工作可以为中子小角散射实验人员提供数据处理过程的重力影响扣除计算方法和数值参考。

关 键 词:重力  中子小角散射  Q  分辨函数  计算

Calculation Method of Q Resolution Function of Small-angle Neutron Scattering in Gravity Field
Peng Mei,Sun Liangwei,Chen Liang,Li Xinxi.Calculation Method of Q Resolution Function of Small-angle Neutron Scattering in Gravity Field[J].Modern Scientific Instruments,2009(4):73-75.
Authors:Peng Mei  Sun Liangwei  Chen Liang  Li Xinxi
Affiliation:(Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900,China)
Abstract:Because of the long scattering distance in small-angle neutron scattering, the effect of gravity could not be neglected. By simulating with vitess program the distribution of gravity had been verified. Based on analyzing calculation, while L1=L2=12m and Q was 0.1nm^-1, the Q resolution function of single beam small-angle neutron scattering in gravity field had been gotten, QG arrived 0.95% of real scattering vector, the Q0 was 0.2% higher than real scattering vector, and the width of Q resolution was 6.7%. It indicated that this calculational Q0 valvue was more close to real vector. The simulating results also afford calculation way and numerical value reference of gravity deducting for experimental personnel in small-angle neutron scattering.
Keywords:Gravity  Small-angle neutron scattering  Q  Resolution function  Calculation
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