中子单色器模拟分析研究  

Simulation and Analysis of Spectrum Selection Affected by Neutron Monochromator's Parameters

作　　者：霍合勇[1,2] 唐科[1,2] 唐彬[1,2] 刘斌[1,2] 曹超[1,2] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900 [2]中国工程物理研究院中子物理学重点实验室,绵阳621900

出　　处：《核电子学与探测技术》2014年第4期461-465,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金青年科学基金(11205138);中国工程物理研究院科学基金(2012B0103004);中国工程物理研究院中子物理学重点实验室项目(2012BB03)

摘　　要：为研究单色器对中子能谱的选择规律，本文利用MCSTAS程序模拟分析了机械速度选择器与晶体单色器几个特征参数对中子能量选择影响。分析结果显示经机械速度选择器单色选择中子注量率要下降1～2个量级，而晶体单色器要下降2～3个量级。因此，对于单色化要求比较高选用晶体单色器，对于实验时间要求较高的选用机械速度选择器。To comprehend the selective rule of monochromator for neutron spectrum , the paper analyzes the effects of several characteristic parameters on neutron energy selection .The simulated results indicate that ve-locity selector could get high neutron flux , whose energy width -broadening becomes larger along with selected neutron peak wavelength , and crystal monochromator could get high energy resolution , whose energy width -broadening becomes narrower along with selected neutron peak wavelength .So it is suggested that crystal mono-chromator can be selected if high energy resolution is required , and mechanical velocity selector can be used if high neutron flux is required .

关 键 词：单色器 模拟 选择 能谱 

分 类 号：O481[理学—固体物理]