guest ::
| Home > Publications database > Time-resolving the UV-initiated photodissociation dynamics of OCS |
| Home > Publications database > Time-resolving the UV-initiated photodissociation dynamics of OCS |
| Preprint | PUBDB-2021-02517 |
; ; ; ; ; ;
2021
This record in other databases:
Please use a persistent id in citations: doi:10.3204/PUBDB-2021-02517
Abstract: We present a time-resolved study of the photodissociation dynamics of OCS after UV-photoexcitation at $\lambda=237$ nm. OCS molecules ($X\,^1\Sigma^+$) were primarily excited to the $1\,^1\!A''$ and the $2\,^1\!A'$ Renner-Teller components of the $^1\Sigma^{-}$ and $^1\!\Delta$ states. Dissociation into CO and S fragments was observed through time-delayed strong-field ionisation and imaging of the kinetic energy of the resulting CO$^+$ and S$^+$ fragments by intense $790$ nm laser pulses. Surprisingly, fast oscillations with a period of $\sim100$ fs were observed in the S$^+$ channel of the UV dissociation. Based on wavepacket-dynamics simulations coupled with a simple electrostatic-interaction model, these oscillations do not correspond to the known highly-excited rotational motion of the leaving CO$(X\,^1\Sigma^+,J\gg0)$ fragments, which has a timescale of $\sim140$ fs. Instead, we suggest to assign the observed oscillations to the excitation of vibrational wavepackets in the $2\,^3\!A''$ or $2\,^1\!A''$ states of the molecule that predissociate to form S$(^3\!P_{J})$ photoproducts.
; 
; Allianz-Lizenz / DFG ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz
; Published ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection
|
The record appears in these collections: |
Journal Article
Time-resolving the UV-initiated photodissociation dynamics of OCS
Faraday discussions 228, 413 - 431 (2020) [10.1039/D0FD00119H]
Files
BibTeX |
EndNote:
XML,
Text |
RIS
PDF