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000459256 0247_ $$2arXiv$$aarXiv:2010.09406
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000459256 1001_ $$0P:(DE-H253)PIP1025827$$aKaramatskos, Evangelos T.$$b0
000459256 245__ $$aTime-resolving the UV-initiated photodissociation dynamics of OCS
000459256 260__ $$c2021
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000459256 520__ $$aWe 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.
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000459256 536__ $$0G:(DE-HGF)2018_Ex-Net-0002-Phase2-3$$aEx-Net-0002-Phase2-3 - Advanced Imaging of Matter: Structure, Dynamics and Control on the Atomic Scale - AIM (2018_Ex-Net-0002-Phase2-3)$$c2018_Ex-Net-0002-Phase2-3$$x3
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000459256 7001_ $$0P:(DE-H253)PIP1084242$$aYarlagadda, Suresh$$b1
000459256 7001_ $$0P:(DE-HGF)0$$aPatchkovskii, Serguei$$b2
000459256 7001_ $$0P:(DE-H253)PIP1007368$$aVrakking, Marc J. J.$$b3
000459256 7001_ $$0P:(DE-H253)PIP1032831$$aWelsch, Ralph$$b4
000459256 7001_ $$0P:(DE-H253)PIP1012175$$aKüpper, Jochen$$b5$$eCorresponding author
000459256 7001_ $$0P:(DE-H253)PIP1008275$$aRouzée, Arnaud$$b6$$eCorresponding author
000459256 773__ $$p1-25
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