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微波硫灯发射光谱的理论模拟

盖志强1, 于欣1, 闫冰2, 陈飞1, 李瑞2, 赵书涛2, 潘守甫2, 陈德应1, 王福利1, 于俊华1   

    1. 哈尔滨工业大学可调谐(气体)激光技术国家级重点实验室, 哈尔滨 150080;
    2. 吉林大学原子与分子物理研究所, 长春 130012
  • 收稿日期:2008-01-10 修回日期:1900-01-01 出版日期:2008-11-10 发布日期:2008-11-10
  • 通讯作者: 闫冰,于俊华

Theoretical Simulation for the Emission Spectrum of Microwave-driven Sulfur Lamp

GAI Zhi-Qiang1, YU Xin1, YAN Bing2*, CHEN Fei1, LI Rui2, ZHAO Shu-Tao2, PAN Shou-Fu2, CHEN De-Ying1, WANG Fu-Li1, YU Jun-Hua1*   

    1. National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150080, China;
    2. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
  • Received:2008-01-10 Revised:1900-01-01 Online:2008-11-10 Published:2008-11-10
  • Contact: YAN Bing,YU Jun-Hua

摘要: 通过实验观测了微波硫灯的发光光谱. 利用从头计算的多组态准简并微扰理论方法, 采用cc-pVQZ基组计算了S2分子B3Σu--X3Σg-态和B3Πu-X3Σg-态的跃迁矩及其振动态之间跃迁的弗兰克-康登因子, 导出了S2分子振动分辨发射谱. 同时, 利用含时密度泛函方法计算了Sn(n=2~8)分子的吸收谱. 将计算得到的S2分子振动分辨发射谱与实验所测得的光谱分布进行了比较分析, 解释了微波硫灯的宽谱区发光光谱的特性.

关键词: 多组态准简并微扰理论, 含时密度泛函, Franck-Condon因子, S2分子发射光谱

Abstract: The emission spectrum of microwave-driven sulfur lamp was obtained by experimental measurement. The emission moment of S2 B3Σu-X3Σg- and B3Πu-X3Σg- electronic states and the Franck-Condon factors between their vibrational level were calculated by quantum ab initio method of multi-configuration quasi-degenerate perturbation theory and cc-pVQZ basic set, then, their emission spectra were derived. Absorption spectra of Sn(n=2—8) molecules were also calculated via time-dependent density functional theory. The emission spectrum and experimental one of S2 molecules were took step to compare and analyze. The results can be used to well explain the emission spectrum characteristic of the microwave-driven sulfur lamp. The theoretical simulation results can well guide the further experiments to fit better with sun′s spectrum.

Key words: Multi-configuration quasi-degenerate perturbation theory, Time dependent density functional theory, Franck-Condon factor, Emission spectrum of S2 molecule

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