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| Concentration modulation laser spectroscopy of the C2 molecule Swan (d3Πg←a3Πu) system | |
| 作者姓名： | KANIKI Kakule YANG Xiaohu GUO Yingchun YU Shanshan LI Benxi LIU Yuyan CHEN Yangqin |
| 作者单位： | Key Laboratory of Optical & Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China; Faculty of Engineering, University of Kinshasa, P. O. Box 225, Kinshasa 11, Dem. Republic of Congo,Key Laboratory of Optical & Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China,Key Laboratory of Optical & Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China,Key Laboratory of Optical & Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China,Key Laboratory of Optical & Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China,Key Laboratory of Optical & Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China,Key Laboratory of Optical & Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China |
| 基金项目： | Supported by the National Natural Science Foundation of China (Grant Nos. 10174020 and 10204007) and Shanghai Priority Academic Discipline |
| 摘 要： | The rotational structure of the C2 molecule Swan (d3Πg←a3Πu) system (0,1) band has been recorded by optical heterodyne magnetic rotation enhanced concentration modulation laser spectroscopy in the range of 17730～17880 cm-1. The C2 molecule is generated by an electric discharge through a mixture of acetylene and argon gas and a well-resolved spectrum is recorded with an absolute accuracy of 0.007 cm-1. Sensitivity of the method enables us to observe not only the traditionally observed branches of ΔΩ＝0 sub-bands but also some ΔΩ≠0 transitions, providing a slight improvement in the accuracy of some molecular constants of the two states. The theoretical spectra are simulated using the effective Hamiltonian of Brown and Merer and directly fitted to observed spectra; rotational parameters are derived from this fit for the two 3Π states. |
| 关 键 词： | C2 molecular constants concentration modulation |
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