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Study of the B 2Σu+, A 2Πu and X 2Σg+ Electronic States of N2+
Wu Shenghai, Liu Yuyan, Wu Ling, Xu Chaoxiong, Yang Xiaohua, Guo Yingchun, Tao Sufen, Chen Yangqin*
KeyLaboratory ofOptical andMagnetic Resonance Spectroscopy, and Department ofPhysics, East China Normal University, Shanghai 200062
Abstract:
The spectra of the (12,6), (11,5) and (7,2) bands of theA2Πu-X2Σ+gsystemand the (1,5) band of the B2Σ+u-X2Σ+gsystem of N2+have been observed and analyzed in the visible region between 16800~17573 cm-1using optical heterodyne magnetic rotation enhanced velocity modulation spectroscopy. This paper has derived the effective Hamiltonian matrixes including the perturbation terms for analysis of the rovibronic spectrum in a diatomic molecule, revealed and explained the mechanism of the perturbation between the A2Πuand B2Σ+ustates of N2+. The analysis shows that the vibronic levels A2Πu (v=11) and B2Σ+u (v=1) have a strong interaction atJ=13.5 (for elevel) and 9.5 (for flevel). As a result, the perturbation constantsξeandηeforA2Πuand B2Σ+ustates ofN2+are obtainedwith the values of -34.1350 (59) cm-1and 1.09756(30) respectively.
Key words:  Electronic states of N2+, Modulation spectroscopy
FundProject:国家自然科学基金、波谱学和原子分子物理国家实验室资助项目以及上海市重点学科资助项目.
N2+分子离子的B2Σu+、A2Πu和X2Σg+电子态光谱研究
吴升海, 刘煜炎, 吴玲, 许朝雄, 杨晓华, 郭迎春, 陶淑芬, 陈扬骎*
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
摘要:
采用光外差-磁旋转-速度调制吸收光谱技术, 在可见光波段范围16800~17573 cm-1, 对N2+的A 2Πu-X 2Σ+g(12,6)、(11,5)、(7,2)带和B 2Σ+u-X 2Σ+g (1,5)带进行了测量和分析,推导了双原子分子振转能级在受到微扰作用时的有效哈密顿量形式,并分析了N2+的A 2Πu-B 2Σ+u之间存在的微扰相互作用,通过与实验数据的拟合得到了精确的电子态微扰常数ξe、ηe .
关键词:  N2+分子离子  光外差-磁旋转-速度调制  电子态光谱
DOI:10.1088/1674-0068/15/5/321-330
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