非弹性中子散射谱仪  

Inelastic neutron scattering spectrometer

作　　者：李历斯 王猛 LI Li-si;WANG Meng(Center for Neutron Science and Technology,School of Physics,Sun Yat-sen University,Guangzhou 510275,China)

机构地区：[1]中山大学物理学院中子科学与技术中心,广东广州510275

出　　处：《物理实验》2021年第9期1-10,共10页Physics Experimentation

基　　金：国家自然科学基金项目(No.11904414);国家重点研发计划项目(No.2019YFA0705702);中山大学质量工程项目。

摘　　要：非弹性中子散射是利用中子与材料晶格或自旋散射发生能量和动量交换来测量材料动力学性质的实验技术.非弹性中子散射谱仪可以直接测量声子谱、自旋波、晶体场等性质,且能量和动量分辨率高,在物理、材料、化学、生物等领域有广泛应用,是前沿科学研究中重要的实验仪器.本文概述了非弹性中子散射的发展过程、基本理论、散射谱仪及应用范例.Inelastic neutron scattering is an experimental technique to measure the dynamic properties of materials by means of energy and momentum exchange between neutron and material lattice or spin scattering.Inelastic neutron scattering spectrometer can directly measure the phonon spectrum,white wave,crystal field,etc.,and the high energy and momentum resolution can be reached.The method has a wide range of applications in the fields of physics,materials,chemistry,biology and other fields.It is a significant experimental method in frontier scientific research.This article summarized the development process,basic theory,scattering spectrometer and application examples of inelastic neutron scattering.

关 键 词：非弹性中子散射 三轴谱仪 飞行时间谱仪 

分 类 号：O571.5[理学—粒子物理与原子核物理]