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Dissociation of C 1s excited states of OCS

På svenska

Author

  • Christian Stråhlman

Summary, in English

Excitation of the C 1s core-electron in carbonyl sulfide (OCS) gives rise to many dissociation channels. Excitation at the C 1s edge gives rise to localized core-holes in carbon atoms, thus being strongly site specific. Photoelectron–photoion coincidence (PEPICO) measurements of the fragmentation of OCS have been done with 3D spectroscopy at MAX-lab in Lund. I show in this report strong differences between the behavior of the O=C bond and the C=S bond by an analysis of the energy and dissociation directions of the molecular fragments O+ and S+. The C=S bond is hereby found to be weaker than the O=C bond. I also show the existence of alignment effects when OCS is irradiated by plane polarized synchrotron radiation corresponding to the C 1s – excitation and the C 1s –excitation. The present report in addition provides an overview of the basic molecular orbital theory.

Publishing year

2009

Language

English

Document type

Student publication for Bachelor's degree

Topic

  • Physics and Astronomy

Supervisor

  • Stacey Ristinmaa Sörensen (professor)