电子显微镜中的康普顿散射
冯振豹, 苏党生
(中国科学院金属研究所 沈阳材料科学国家（联合）实验室，辽宁 沈阳110016)
摘 要：在电子显微镜中，通过记录大角非弹性散射电子能量损失谱来研究固体材料基态电子动量密度分布的方法，称为固体的电子康普顿散射技术（electron compton scattering from solids, ECOSS）。利用该技术得到的康普顿轮廓的动量分辨率可以达到从同步辐射光源上得到的康普顿轮廓的动量分辨率水平；而其非常短的收集时间，使利用康普顿散射对固体材料电子动量密度的系统研究成为可能。本文简要介绍了该技术的背景、实验方法、理论基础，研究进展和应用。
关键词：透射电子显微镜；电子能量损失谱；固体的电子康普顿散射
中图分类号：O469；O433.1；O433.4；O434.13；TN16 文献标识码：A
doi：10.3969/j.1000-6281.2014.03.007
Electron compton scattering in the electron microscope
FENG Zhen-bao ，SU Dang-sheng*
(Shenyang National Laboratory for Materials Science, Institute of Metal Research,
Chinese Academy of Sciences, Shenyang Liaoning 11016, China)
Abstract: The ground-state electronic momentum density of solids can be studied by measuring electron energy-loss spectroscopy (EELS) at large scattering angle in the transmission electron microscope (TEM) known as electron Compton scattering from solids (ECOSS). The order of the momentum resolution of the ECOSS measurements that only can be achieved by synchrotron-based Compton scattering experiments. The short recording time of the ECOSS technique makes systematic studies of materials become possible by the Compton scattering. In this paper, we briefly described the background, experimental method, theory, progress and applications of the ECOSS technique.
Keywords: transmission electron microscope；electron energy-loss spectroscopy；electron Compton scattering from solids
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