PHOFEX Continuum Spectra of SO2 + in Range (563 ～660 nm)
- Received Date: 2002-10-23
- SO2+, Photo-dissociation, PHOFEX spectrum /
Abstract: The photodissociation process of SO2+ molecular ions has been investigated by measuring the photofragment SO+excitation (PHOFEX) spectrum in visible (563~660 nm) wavelength range under the condition of supersonic molecular beam. The SO2+molecular ion were prepared purely by [3+1] multiphoton ionization of the neutral SO2 molecules at 380.85 nm. The SO+ PHOFEX spectrum in 563~660 nm range is continuum without any clear structure and the dissociation efficiency producing SO+ decreases with the laser wavelengths toward to red direction. These facts means that there should be a repulsive state ofα2A2around SO2+ (E, D , C). The [1+1] photodissociation mechanism of producing SO+ is suggested. Firstly, SO2+(~X2A1) ions is excited into the energy range with high dense levels of the middle state~B2B2, then SO2+(~B2B2) ions is excited into theα2A2repulsivestate by absorbing another photon, and finally dissociates to SO+(X2Π) +O(3Pg) directly .
|Citation:||Wang Zhong, Zhang Limin, Li Jiang, Wang Feng, Yu Yuanqin, Zhang Junlong, Yu Shuqin. PHOFEX Continuum Spectra of SO2 + in Range (563 ～660 nm)[J]. Chinese Journal of Chemical Physics , 2003, 16(2): 89-93. doi: 10.1088/1674-0068/16/2/89-93|