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Observation of Interference Effects in (e, 2e) Electron Momentum Spectroscopy of SF6 (cited: 1)
Min-fu Zhao1,2, Xu Shan*1, Jing Yang1, En-liang Wang1, Shan-shan Niu1, Xiang-jun Chen1
1.Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China;2.The Center of Basic Laboratory, West Anhui University, Lu'an 237012, China
Abstract:
Two-dimensional electron density map (2D map) of binding energy and relative azimuthal angle (i.e., momentum) for the outer-valence molecular orbitals of SF6 has been measured by a highly sensitive electron momentum spectrometer with noncoplanar symmetric geometry at the impact energy of 1.2 keV plus binding energy. The experimental electron momentum profiles for the relevant molecular orbitals have been extracted from the 2D map and interpreted on the basis of the quantitative calculations using the density functional theory with B3LYP hybrid functional. For the outermost F2p nonbonding orbitals of SF6, the interference patterns are clearly observed in the ratios of the electron momentum profiles of molecular orbitals to that of atomic F2p orbital.
Key words:  (e, 2e) electron momentum spectroscopy, Interference effect, Bond oscillation, Electron momentum profile
FundProject:
SF6电子动量谱学研究中干涉效应的观测
赵敏福1,2, 单旭*1, 杨靖1, 王恩亮1, 牛珊珊1, 陈向军1
1.中国科学技术大学近代物理系,合肥微尺度物质科学国家实验室(筹),合肥230026;2.皖西学院基础实验中心,六安237012
摘要:
利用非共面对称的高效率(e,2e)电子动量谱仪测量了SF6分子外价分子轨道的二维电子能量- 动量密度谱. 通过理论计算与实验结果的比较,发现B3LYP密度泛函理论计算结果可以较好地解释实验测量的轨道电子动量分布. 此外,对于最外层的4个来自F2p孤对电子贡献的非键分子轨道,实验上观测到非常明显的多中心干涉图样.
关键词:  (e, 2e)电子动量谱学,干涉效应,键振动,电子动量分布
DOI:10.1063/1674-0068/28/cjcp1508168
分类号: