A theoretical analysis on the vibronic spectra with mass analyzed threshold ionization spectroscopy

作者：Chao Sheng D^*; Peng Hsin Y

来源：Journal of Molecular Spectroscopy, 2008, 247(1): 30-40.

DOI：10.1016/j.jms.2007.10.004

• resonance two-photon transition
• mass analyzed threshold ionization spectroscopy
• inverse Born-Oppenheimer approximation
• Franck-Condon factor

We have theoretically studied the absorption vibronic spectra with the resonance two-photon (R2P) and non-resonance two-photon (NR2P) mass analyzed threshold ionization (MATI) spectroscopy. The theory uses the inverse Born-Oppenheimer approximation (IBOA) to establish a proper basis set. To analyze the MATI vibronic spectra, we have calculated the Franck-Condon factors involved in the vibronic transitions. Several experimental spectra are analyzed using this theory with emphasis on the importance of the resonance intermediate states. The long vibrational progression in a MATI spectrum can be partly attributed to the result of including the anharmonic correction in the calculated Franck-Condon factors. The experimentally observed isotope effect is also analyzed.

• 出版日期2008-1