کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5415939 | 1393786 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Direct observation of the Dâ² 2g(3P2)-Aâ² 3Î (2u) system for Cl2 by laser induced fluorescence spectroscopy: Determination of the absolute position of the Aâ² state
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In a discharged supersonic jet of Cl2, transitions of the Dâ² 2g(3P2)-Aâ² 3Î (2u) system for 35Cl2 were observed directly by laser induced fluorescence spectroscopy. By a discharge in Cl2, the Cl2 molecules were populated into the Aâ² state, which is a metastable and optically forbidden state, from the X1Σg+(0g+) state. An ultraviolet laser radiation excites the molecules to the Dâ² ion-pair state. A set of Dunham parameters for the Aâ² state is determined from a global least-squares fitting for 59 vibronic bands with vâ³Â = 0-7. In the fitting, the previously reported data, T(v) and B(v) for the v = 14 and 15 bands of the Aâ² state [T. Ishiwata, A. Ishiguro, K. Obi, J. Mol. Spectrosc. 147 (1991) 300-320], were included. Y00 = 57295.723(5) cmâ1 of the Dâ² state [J.-H. Si, T. Ishiwata, K. Obi, J. Mol. Spectrosc. 147 (1991) 334-345] was also included in the global fitting in order to determine the absolute position of the Aâ² state. The determined parameters of the Aâ² state are Y00 = 17171.506(14), Y10 = 255.915(85), Y20 = â4.465(70), Y30 = â8.7(23) Ã 10â2, Y40 = 6.3(35) Ã 10â3, Y50 = â4.9(26) Ã 10â4, Y60 = 1.43(69) Ã 10â5, Y01 = 0.16282(15), Y11 = â2.363(68) Ã 10â3, Y21 = â5.01(93) Ã 10â5, and Y31 = â3.01(36) Ã 10â6 (in cmâ1 and one standard deviations of the fit in parentheses). The absolute position of the Aâ² state is determined with good accuracy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Spectroscopy - Volume 241, Issue 2, February 2007, Pages 230-236
Journal: Journal of Molecular Spectroscopy - Volume 241, Issue 2, February 2007, Pages 230-236
نویسندگان
Takashi Yoshikawa, Yoshihiro Sumiyoshi, Yasuki Endo,