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双原子分子光谱 Diatomic Molecular Spectroscopy

The Spectra and Dynamics of Diatomic Molecules. 双原子分子光谱 Diatomic Molecular Spectroscopy. （五）. 马维光 量子光学与光量子器件国家重点实验室 山西大学物理电子工程学院 激光光谱研究室. Previous chapter: possible energy levels and symmetries of wavefunciton

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双原子分子光谱 Diatomic Molecular Spectroscopy

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  1. The Spectra and Dynamics of Diatomic Molecules 双原子分子光谱 Diatomic Molecular Spectroscopy （五） 马维光 量子光学与光量子器件国家重点实验室 山西大学物理电子工程学院 激光光谱研究室

  2. Previous chapter: possible energy levels and symmetries of wavefunciton This chapter: interpretation of molecular spectra and investigation of molecular structure selection rules transition intensity

  3. Einstein definition and quantum definition

  4. Putting Dik to a matrix indicating all the possible transitions.

  5. (a) (b) Different electronic states Same electronic states

  6. line positions and intensitiesterm value and matrix elements :transitions within the same electronic state Matrix element:

  7. Vibrational transition Rotational transition

  8. Taylor seires

  9. E along z direction polarization

  10. All rotational lines for a vibrational transition is called a vibrational band

  11. An optical transition between two electronic states occurs so quickly that neither the positions nor the velocities of the nuclei change significantly during the transition. The electronic transition occurs vertically in the potencial energy diagram ---Frank Condon principle

  12. Separate energy (bond state) line spectra

  13. Matrix elements Multi photon probability

  14. 多光子过程的优点和特征： 1、可以跃迁到单光子不能达到的能级； 2、利用可见光产生高激发态分子； 3、多光子过程增加自电离态的几率； 4、可以诱导化学反应； 5、利用不同的激光束结构，实现亚多普勒光谱。

  15. Infrared spectra Rayleigh scattering Stockes waves and anti Stockes waves Raman scattering

  16. Infrared spectra Homonuclie Heteronuclie Raman spectra

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