N_2^+分子离子的B^2Σ_u^+、A^2Π_u和X^2Σ_g^+电子态光谱研究  

Study of the B~ 2Σ_u^+, A ~2Π_u and X~ 2Σ_g^+ Electronic States of N_2^+*

作　　者：吴升海[1] 刘煜炎[1] 吴玲[1] 许朝雄 杨晓华[1] 郭迎春[1] 陶淑芬 陈扬骎[1] 

机构地区：[1]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

出　　处：《Chinese Journal of Chemical Physics》2002年第5期321-330,共10页化学物理学报（英文）

基　　金：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 .~~

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 16 80 0～ 175 73cm-1,对N2 + 的A2 Πu-X2 Σ+ g(12 ,6 )、(11,5 )、(7,2 )带和B2 Σ+ u -X2 Σ+ 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A2 Πu-B2 Σ+ 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.The spectra of the (12,6), (11,5) and (7,2) bands of the A 2Π_u-X 2Σ+_g system and the (1,5) band of the B 2Σ+_u-X 2Σ+_g system of N_2+ have been observed and analyzed in the visible region between 16800～17573 cm -1 using 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 A 2Π_u and B 2Σ+_u states of N_2+. The analysis shows that the vibronic levels A 2Π_u (v=11) and B 2Σ+_u (v=1) have a strong interaction at J=13.5 (for e level) and 9.5 (for f level). As a result, the perturbation constants ξ_e and η_e for A 2Π_u and B 2Σ+_u states of N_2+ are obtained with the values of -34.1350 (59) cm -1 and 1.09756(30) respectively.

关 键 词：N2^+分子离子 光外差-磁旋转-速度调制 电子态光谱 吸收光谱 电子态微扰常数 振转能级 双原子分子 氮分子 

分 类 号：O561.3[理学—原子与分子物理]