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|標題:||The D (1)Sigma(+) state of (LiH)-Li-7|
|期刊/報告no：:||Journal of Chemical Physics, Volume 113, Issue 2, Page(s) 683-689.|
|摘要:||The (LiH)-Li-7 D (1)Sigma(+) excited electronic state has been observed for the first time by a pulsed optical-optical double resonance fluorescence depletion spectroscopic technique. Several rovibrational levels of the A (1)Sigma(+) and B (1)Pi electronic states have been used as the intermediate states. Among 22 vibrational levels, 128 rovibrational levels have been observed. The spectral assignment is identified by the observed rotational structures and term values and by a comparison between the derived vibrational and rotational constants with the theoretical values. An ab initio adiabatic potential energy curve for the D (1)Sigma(+) state and relevant D (1)Sigma(+)-A (1)Sigma(+) and D (1)Sigma(+)-B (1)Pi transition moment functions are presented. An overall measure of three different aspects, the energetics, the spectral line shape, and the transition probability, strongly favors the argument that the vibronic approach is a better approach for characterizing the excited D (1)Sigma(+) electronic state. (C) 2000 American Institute of Physics. [S0021-9606(00)01226-5].|
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