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Dissociation of deuteromethane following carbon 1s core ionization

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Author

  • Edwin Kukk
  • Jaume Rius i Riu
  • Marek Stankiewicz
  • Paul Hatherly
  • Peter Erman
  • Elisabeth Rachlew
  • Piotr Winiarczyk
  • Marko Huttula
  • Seppo Aksela

Summary, in English

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.

Publishing year

2002

Language

English

Publication/Series

Physical Review A (Atomic, Molecular and Optical Physics)

Volume

66

Issue

1

Document type

Journal article

Publisher

American Physical Society

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Status

Published

ISBN/ISSN/Other

  • ISSN: 1050-2947