Title

Partial Cation and Anion-yield Experiments in Ammonia around the N 1s Ionization threshold

Document Type

Article

Publication Date

2007

Publication Title

Journal of Electron Spectroscopy and Related Phenomena

Volume

155

First page number:

86

Last page number:

90

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.

Keywords

Ammonia; Anions; Cations; Electronic excitation; Fragmentation reactions; Photoexcitation; Photofragmentation

Disciplines

Analytical Chemistry | Atomic, Molecular and Optical Physics | Biological and Chemical Physics | Physical Chemistry

Language

English

Permissions

Use Find in Your Library, contact the author, or use interlibrary loan to garner a copy of the article. Publisher copyright policy allows author to archive post-print (author’s final manuscript). When post-print is available or publisher policy changes, the article will be deposited

Identifier

DOI: 10.1016/j.elspec.2006.11.009

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