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Article
Partial cation and anion-yield experiments in ammonia around the N 1s ionization threshold
Journal of Electron Spectroscopy and Related Phenomena
  • Maria Novella Piancastelli, Uppsala University
  • Renaud Guillemin, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement
  • Wayne C. Stolte, University of Nevada, Las Vegas
  • D. Ceolin, Uppsala University
  • Dennis W. Lindle, University of Nevada, Las Vegas
Document Type
Article
Publication Date
1-1-2007
Abstract

We report partial cation and anion-yield measurements around the N K edge in isolated ammonia molecules. Due to the dominance of spectator electronic decay following Rydberg excitations, fragmentation was found to be more extensive following excitation to intermediate states of Rydberg character compared to excitation of states with molecular-orbital character. Unusual stability of the NH32+ fragment produced directly above threshold by normal-Auger decay is attributed to a stable planar geometry induced by a specific electronic configuration. Hydrogen anions are not detected above threshold except following the decay of resonant doubly excited neutral states embedded in the K-shell ionization continuum.

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Citation Information
Maria Novella Piancastelli, Renaud Guillemin, Wayne C. Stolte, D. Ceolin, et al.. "Partial cation and anion-yield experiments in ammonia around the N 1s ionization threshold" Journal of Electron Spectroscopy and Related Phenomena Vol. 155 (2007) p. 86 - 90
Available at: http://works.bepress.com/wayne_stolte/13/