光学学报, 2000, 20 (6): 769, 网络出版: 2006-08-09
气相吡啶分子S1态的(2+3)偏振共振多光子电离谱研究
Study on S1State in Pyridine Gas by (2+3) PRMPI Spectra
偏振共振多光子电离谱 偏振比 电子振动谱带 polarization resonance multiphoton ionization spec polarization ratio vibronic band.
摘要
利用气相吡啶分子分别在圆偏振光激发和线偏振光激发下的(2+3)偏振共振多光子电离(PRMPI)谱, 对其第一激发态(S1)上的振转结构进行了研究。 在谱中观察到了呈双峰结构的电子振转跃迁谱带。 分析表明, 所有振动谱带均为S1态上ν6a、 ν10a、 ν12、 ν16b和ν17a以及基态上ν9a的混合频率谱带。 指认吡啶ν17a的S1态频率为670 cm-1, 并认为在S1态上ν17a频率降低的原因与ν10a类似。
Abstract
The rovibronic structure on the first electronic excited state (S1) in gaseous pyridine was studied in its (2+3) polarization resonance multiphoton ionization (PRMPI) spectra excited by circularly and linearly polarized laser respectively. In the spectra, double-peak rovibronic bands were mostly observed. The result indicates that all the vibronic bands were assigned to various mixed-frequency bands of ν6a, ν10a, ν12, ν16b and ν17a in S1 and ν9a in S0. It is assigned that the frequency of ν17a in S1state is 670 cm-1, and the ν17a frequency decreasing in S1state is attributed to the similar mechanism undergone by ν10a.
赵青春, 林美荣, 李云静, 张包铮, 陈文驹. 气相吡啶分子S1态的(2+3)偏振共振多光子电离谱研究[J]. 光学学报, 2000, 20(6): 769. 赵青春, 林美荣, 李云静, 张包铮, 陈文驹. Study on S1State in Pyridine Gas by (2+3) PRMPI Spectra[J]. Acta Optica Sinica, 2000, 20(6): 769.
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