Anisotropic ultrafast dissociation probed by the Doppler effect in resonant photoemission from CF4.
Anisotropic ultrafast dissociation probed by the Doppler effect in resonant photoemission from CF4.
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DOI：
10.1103/physrevlett.90.233006
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发表时间：
2003-06
影响因子：
8.6
通讯作者：
K. Ueda;M. Kitajima;A. De Fanis;T. Furuta;H. Shindo;H. Tanaka;K. Okada;R. Feifel;S. Sorensen-S.-Sore
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文献类型：
--
作者：
K. Ueda;M. Kitajima;A. De Fanis;T. Furuta;H. Shindo;H. Tanaka;K. Okada;R. Feifel;S. Sorensen-S.-Sore
测量了F1 s激发的CF 4衰变的共振俄歇谱。当激发光子能量通过共振区调谐时，几条谱线表现出非色散动能。当沿着光的偏振矢量观察到电子发射时，由于运动中的碎片发射俄歇电子，F1 s（-1）类原子俄歇线被分成两个分量。这种多普勒分裂是核心激发导致T（d）->C（3v）对称性降低的直接证据，这是通过特定C-F键的伸长而实现的，该键优先沿沿着入射光子的偏振矢量排列。
The resonant Auger spectrum from the decay of F 1s-excited CF4 is measured. Several lines exhibit a nondispersive kinetic energy as the exciting photon energy is tuned through the resonance region. The F 1s(-1) atomiclike Auger line is split into two components due to the emission of Auger electrons by a fragment in motion, when electron emission is observed along the polarization vector of the light. This Doppler splitting is direct evidence that the core excitation leads to T(d)-->C(3v) symmetry lowering, by elongation of a specific C-F bond preferentially aligned along the polarization vector of the incident photon.