State selective fragmentation kinematics of OCS2+ following S(2p) Auger decay

[Display omitted] •Influence of core ionization on fragmentation channels of OCS is studied.•Auger decay of OCS is effected by photoionization of S(2p) core orbital.•Molecular fragmentation is found to be strongly correlated to different Auger decays.•Observations can be explained by the energetics...

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Bibliographic Details
Published in:Chemical physics letters 2014-06, Vol.607, p.85-91
Main Authors: Saha, K., Banerjee, S.B., Bapat, B.
Format: Article
Language:English
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Summary:[Display omitted] •Influence of core ionization on fragmentation channels of OCS is studied.•Auger decay of OCS is effected by photoionization of S(2p) core orbital.•Molecular fragmentation is found to be strongly correlated to different Auger decays.•Observations can be explained by the energetics of dissociative ionization process. Kinematically complete study of dissociation of OCS due to various Auger decays upon excitation at S(2p1/2) ionization threshold is presented. Ion momentum spectrometry and energy selected Auger electron–photoion–photoion coincidence techniques are employed to perform these studies. Fragmentation mechanisms show marked differences (both kinematic and cross sectional) depending on the final Auger state attained. The kinematic features for S(2p) ionization are significantly different from that of valence photo double ionization of OCS.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2014.05.037