Vibrational state-specific nonadiabatic photodissociation dynamics of OCS+ via A2Π1/2 (ν1 0 ν3) states.
- Resource Type
- Article
- Authors
- Wang, Yaling; Zhao, Yunfan; Zhang, Ning; Wang, Wenxin; Hu, Liru; Luo, Chang; Yuan, Daofu; Zhou, Xiaoguo; Parker, David H.; Yang, Xueming; Wang, Xingan
- Source
- Journal of Chemical Physics. 2/28/2024, Vol. 160 Issue 8, p1-7. 7p.
- Subject
- *PHOTODISSOCIATION
*EXCITED states
*BRANCHING ratios
*ION migration & velocity
*INVESTIGATION reports
- Language
- ISSN
- 0021-9606
The identification and analysis of quantum state-specific effects can significantly deepen our understanding of detailed photodissociation dynamics. Here, we report an experimental investigation on the vibrational state-mediated photodissociation of the OCS+ cation via the A2Π1/2 (ν1 0 ν3) states by using the velocity map ion imaging technique over the photolysis wavelength range of 263–294 nm. It was found that the electronically excited S+ product channel S+(2Du) + CO (X1Σ+) was significantly enhanced when the ν1 and ν3 vibrational modes were excited. Clear deviations in the branching ratios of the electronically excited S+ channel were observed when the vibrational modes ν1 and ν3 were selectively excited. The results reveal that vibrationally excited states play a vital role in influencing the nonadiabatic couplings in the photodissociation process. [ABSTRACT FROM AUTHOR]