Wu Ling, Zheng Lijuan, Guo Yingchun, Xu Chunyan, Yang Xiaohua, Liu Yuyan, Chen Yangqin. Application of the Zeeman Effect to the Spectral Assignment of Cl2+ Including Its Isotopics[J]. Chinese Journal of Chemical Physics , 2005, 18(6): 883-886. DOI: 10.1088/1674-0068/18/6/883-886
Citation:
Wu Ling, Zheng Lijuan, Guo Yingchun, Xu Chunyan, Yang Xiaohua, Liu Yuyan, Chen Yangqin. Application of the Zeeman Effect to the Spectral Assignment of Cl2+ Including Its Isotopics[J]. Chinese Journal of Chemical Physics , 2005, 18(6): 883-886. DOI: 10.1088/1674-0068/18/6/883-886
Wu Ling, Zheng Lijuan, Guo Yingchun, Xu Chunyan, Yang Xiaohua, Liu Yuyan, Chen Yangqin. Application of the Zeeman Effect to the Spectral Assignment of Cl2+ Including Its Isotopics[J]. Chinese Journal of Chemical Physics , 2005, 18(6): 883-886. DOI: 10.1088/1674-0068/18/6/883-886
Citation:
Wu Ling, Zheng Lijuan, Guo Yingchun, Xu Chunyan, Yang Xiaohua, Liu Yuyan, Chen Yangqin. Application of the Zeeman Effect to the Spectral Assignment of Cl2+ Including Its Isotopics[J]. Chinese Journal of Chemical Physics , 2005, 18(6): 883-886. DOI: 10.1088/1674-0068/18/6/883-886
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Ministry of Education, Department of Physics, East China Normal University, Shanghai 200062; State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Phy
2.
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Ministry of Education, Department of Physics, East China Normal University, Shanghai 200062
Funds: Project supported by the National Natural Science Foundation of China (10204007 and 10434060) and Science and Technology Commission of Shanghai Municipality (04DZ14009).
The A2Πu-X2Πg electronic absorption spectrum of the Cl2+ molecular cation in the region between 16820 and 17350 cm-1 was observed by employing optical heterodyne magnetic rotation enhanced velocity modulation spectroscopy. Cl2+ is a paramagnetic molecule; however, the intensities of some spectral lines, belonging to three bands whose origins are near 17282, 17324 and 16913 cm-1, respectively, remain unchanged with in the magnetic field. This indicates that both the upper and lower states have a weak Zeeman effect. The Zeeman contribution is nearly zero for the 2Π1/2 state, while nonvanishing for the 2Π3/2 state. Therefore, this behavior for the spectral assignment of Cl2+, including its isotopics was utilized and the identity of these bands was confirmed as members of the Ω=1/2 component of the electronic transition conveniently and unambiguously. The assigned bands are the (3, 7) band of the Ω=1/2 component of 35Cl+2 and 35Cl37Cl+ and the (2, 7) band of the Ω=1/2 component of 35Cl2+. It extends the range of vibrational assignments considerably in both the ground and the excited state, and leads to the successful rotational analysis. New molecular constants of Cl2+ were obtained from the observed line positions, band by band, using a weighted leastsquares fitting procedure.