ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The [1+1] A˜ 2Πu-state resonance enhanced two-photon dissociation process of CS2+ molecular ions has been investigated by measuring the photofragment S+ excitation (PHOFEX) spectrum in the wavelength range of 424–482 nm, where the CS2+ molecular ions were prepared purely by [3+1] multiphoton ionization of the neutral CS2 molecules at 483.2 nm. The PHOFEX spectrum was assigned essentially to the CS2+(A˜ 2Πu)←CS2+(X˜ 2Πg) transition, and the dissociation mechanism of CS2+ was preliminarily attributed to (i) CS2+(X˜ 2Πg)→CS2+(A˜ 2Πu) through one-photon excitation, (ii) CS2+(A˜ 2Πu)→CS2+(X˜†) via internal conversion process due to the vibronic coupling between the A˜ and X˜ states, (iii) CS2+(X˜†)→CS2+(B˜ 2Σu+) through the second photon excitation, and (iv) CS2+(B˜ 2Σu+)→S++CS owing to the potential curve crossing with the repulsive 4Σ− state correlated with the first dissociation limit. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1377600
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