Anisotropic fragment emission on valence photoionization of CF4
Anisotropic fragment emission on valence photoionization of CF4
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DOI：
10.1016/j.elspec.2006.02.005
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发表时间：
2006-06-01
影响因子：
1.9
通讯作者：
Shigemasa, E
中科院分区：
文献类型：
--
作者：
Hikosaka, Y;Shigemasa, E
在17-60 eV的光子能量范围内测量了具有各向同性几何结构的CF 4的光电离的光离子图像。碎片离子发射低于40 eV被发现是各向异性的相对于线偏振光的电矢量。这一观测结果直接表明，在解离光电离过程中，T-d对称性被破坏。与未占据轨道的跃迁相关的激发态受到对称性降低，这促进了高度对称分子的各向异性碎片发射。(c)2006 Elsevier B. V.保留所有权利。
Photoion images from photoionization of CF4 with an isotropic geometry have been measured in the photon energy range of 17-60 eV. Fragment ion emissions below 40 eV are found to be anisotropic with respect to the electric vector of the linearly polarized light. This observation directly implies that the T-d symmetry is broken on the dissociative photoionization process. The excited states associated with the transitions to the unoccupied orbitals are subject to symmetry lowering, which promotes the anisotropic fragment emissions from the highly-symmetrical molecule. (c) 2006 Elsevier B.V. All rights reserved.