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CO~+分子离子彗尾带系在近红外区域的光谱研究

Study on the Comet-Tail System of ¹²C¹⁶O⁺ in the Near-Infrared Region

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【Author】 LI Wei~1, YANG Xiao-hua~1, GAN Yu-jie~1, WU Ling~2, GUO Ying-chun~1, LIU Yu-yan~1, CHEN Yang-qin~(1)1. Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China

【机构】华东师范大学物理系；波谱与原子分子物理国家重点实验室；华东师范大学物理系光谱学与波谱学教育部重点实验室；上海200062；光谱学与波谱学教育部重点实验室；中国科学院武汉物理与数学研究所；湖北武汉430071；上海200062；

【摘要】 CO+分子离子是一种重要的瞬态自由基分子,许多研究者对该带系进行了大量的研究。文章采用光外差-磁旋转-速度调制光谱技术测量了12C16O+分子离子彗尾带系(A2Πi-X2Σ+)在近红外区域的3个支带(0,3),(1,4)和(3,6)的振转吸收光谱。利用最小二乘法拟合,得到了上态A2Πi(ν′=0,1,3)的精确的分子常数。进一步验证了光外差-磁旋转-速度调制光谱技术在吸收光谱测量中的优越性。更多还原

【Abstract】 The molecular cation CO⁺ is a very important transient molecular radical, and the spectra of the ion has been investigated by numerous researchers. Optical-heterodyne-magnetic-rotation-enhanced velocity modulation spectroscopy（OH-MR-VMS） was employed to measure the comet-tail system （A²Π_i-X²Σ⁺） of ¹²C¹⁶O⁺ molecular ion. The vibrational rotation Absorption spectra were observed in the near-infrared region, including three bands of （0, 3）, （1, 4）and（3, 6）. A set of precise molecular constants for the （A²Π_i（ν′=0, 1, 3）） were determined using the least-squares fit. This experiment has further proved that OH-MR-VMS is very valuable in measuring Absorption spectra of molecular ions.更多还原