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Dissociation of deuteromethane following carbon 1s core ionization
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2002 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 66, no 1Article in journal (Refereed) Published
Abstract [en]

Energy-resolved electron-ion coincidence spectra of the deuteromethane molecule were measured following ionization by narrow-band synchrotron radiation. The ion mass spectra were recorded in coincidence with the outer and inner valence photoelectrons and with the normal Auger electrons from the decay of the carbon 1s core hole. Complementary noncoincidence ion mass spectra were measured below and above the C 1s threshold. The fragmentation patterns of the singly and doubly ionized deuteromethane under different ionization conditions are examined. Carbon core ionization is shown to open new photodissociation pathways not available in the valence ionization photon energy regime. With the aid of ab initio quantum chemistry calculations, a two-step model of the dissociation following core ionization is proposed, showing a good agreement with the experimental findings.

Place, publisher, year, edition, pages
2002. Vol. 66, no 1
Keyword [en]
photoelectron-photoion coincidence, synchrotron-radiation, electronic states, excited states, x-ray, methane, spectrum, fragmentation, decay, ion
Identifiers
URN: urn:nbn:se:kth:diva-21779DOI: 10.1103/PhysRevA.66.012704ISI: 000177200800050OAI: oai:DiVA.org:kth-21779DiVA: diva2:340477
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Rachlew, Elisabeth

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