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首页> 外文期刊>The Journal of Chemical Physics >ROTATIONALLY RESOLVED SPECTRUM OF THE C (2)PI(U)[-X (2)PI(G) ELECTRONIC TRANSITION OF C-4(-) VIA RESONANT TWO-PHOTON DETACHMENT SPECTROSCOPY
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ROTATIONALLY RESOLVED SPECTRUM OF THE C (2)PI(U)[-X (2)PI(G) ELECTRONIC TRANSITION OF C-4(-) VIA RESONANT TWO-PHOTON DETACHMENT SPECTROSCOPY

机译：共振两光子分离光谱法对C-4（-）进行C（2）PI（U）[-X（2）PI（G）电子跃迁的旋转分辨谱

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摘要

The C (2) Pi(u)<--X( )2 Pi(g) electronic transition of C-4(-) has been studied by both one-color and two-color resonant two-photon detachment (R2PD) spectroscopy. The one-color spectrum reveals vibrational structure in the excited anion state. Transitions due to excitations in one of the symmetric stretching modes as well as the bending modes are observed. Spectral resolution in the one-color experiment is limited by power broadening; using two-color R2PD, rotationally resolved spectra of the origin and 2(0)(1) bands of the C (2) Pi(u)<--X (2) Pi(g) transition are obtained. Molecular constants determined by fitting the rotationally resolved spectra are generally in good agreement with a recent ab initio calculation by Schmatz and Botschwina [Int. J. Mass. Spec. Ion. Proc. 149, 621 (1995)]. Perturbations in the 2(0)(1) band are attributed to Fermi resonance interactions in the C (2) Pi(u) state. (C) 1996 American Institute of Physics. [References: 39]
机译：C-4（-）的C（2）Pi（u）<-X（）2 Pi（g）电子跃迁已通过单色和双色共振双光子脱离（R2PD）光谱进行了研究。一色光谱揭示了在激发阴离子状态下的振动结构。观察到由于在对称拉伸模式以及弯曲模式之一中的激发而引起的跃迁。单色实验中的光谱分辨率受功率展宽的限制;使用双色R2PD，获得C（2）Pi（u）<-X（2）Pi（g）跃迁的原点和2（0）（1）波段的旋转分辨光谱。通过拟合旋转解析光谱确定的分子常数通常与Schmatz和Botschwina最近的从头算起[Int。 J.质谱离子。进程149，621（1995）]。 2（0）（1）谱带中的摄动归因于C（2）Pi（u）态的费米共振相互作用。 （C）1996年美国物理研究所。 [参考：39]

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