Visible wavelength electronic spectroscopy of the DCBr Ã-X̃ vibronic transition

Chun Wei Chen, Tsung Chuan Tsai, Bor Chen Chang

研究成果: 雜誌貢獻期刊論文同行評審

25 引文 斯高帕斯(Scopus)


The laser excitation and dispersed fluorescence spectra of the DCBr Ã-X̃ vibronic bands between 570 and 600 nm were successfully obtained in a direct current (DC) discharge supersonic free jet expansion. The analysis of the dispersed fluorescence spectra results in information on the vibrational structure of the DCBr X̃1 A′ state for the first time. Perturbations due to the background levels of the ã3 A″ state can be recognized. The data are consistent with the previously reported triplet-singlet energy gap (the zero-point level energy gap) of 5:73 ± 0:02 kcal/mol for HCBr. We have determined the vibrational frequencies to be 832 cm-1 (bend) and 663 cm-1 (C-Br stretch) for the X̃1 A′ state. In addition to the X̃ state vibrational structure, the Ã(0,6,2) and Ã(0,5,0) levels were also observed for the first time.

頁(從 - 到)254-258
期刊Journal of molecular spectroscopy
出版狀態已出版 - 2001


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