处于D 2A1态的CF4的振动分辨光离化动力学

Vibrationally resolved photoionization dynamics of CF4 in the D 2A1 state.

作者信息

Das Aloke, Miller J Scott, Poliakoff E D, Lucchese R R, Bozek John D

机构信息

Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.

出版信息

J Chem Phys. 2007 Jul 28;127(4):044312. doi: 10.1063/1.2749723.

DOI:10.1063/1.2749723

PMID:17672695

Abstract

Vibrationally resolved photoelectron spectroscopy of the CF4+ (D 2A1) state is studied for the first time over an extended energy range, 26.5<or=hnu<or=50 eV. It is found that the energy dependence of the totally symmetric stretching vibration is qualitatively different from all of the other vibrational modes. Moreover, the vibrational branching ratio curves for all of the symmetry forbidden vibrations are nearly identical. Qualitative arguments are used to show that it is likely that at least two shape resonances are present in the continuum, and that their characteristics, such as energy dependence and spatial localization, are distinctly different.

摘要

首次在26.5≤hν≤50 eV的扩展能量范围内研究了CF4 +（D2A1）态的振动分辨光电子能谱。发现全对称伸缩振动的能量依赖性与所有其他振动模式在性质上不同。此外，所有对称禁戒振动的振动分支比曲线几乎相同。定性论证表明，连续谱中可能至少存在两个形状共振，并且它们的特征，如能量依赖性和空间局域化，明显不同。