Evidence of ultra-fast dissociation in ammonia observed by resonant Auger electron spectroscopy

We present evidence for ultra-fast dissociation of molecular ammonia when photo-excited to the N1s→4a 1 core-hole state. This finding is based on resonant Auger spectroscopical results as well as qualitative arguments concerning the photon energy dependence of the Auger structures. Calculations of t...

Full description

Saved in:

Bibliographic Details
Published in:	Chemical physics letters 2003, Vol.370 (5), p.781-788
Main Authors:	Hjelte, I, Piancastelli, M.N, Jansson, C.M, Wiesner, K, Björneholm, O, Bässler, M, Sorensen, S.L, Svensson, S
Format:	Article
Language:	eng
Subjects:	Atom and Molecular Physics and Optics Atom- och molekylfysik och optik Atomic and molecular physics Diffuse spectra predissociation, photodissociation Exact sciences and technology Fysik Molecular properties and interactions with photons Natural Sciences Naturvetenskap Photon interactions with molecules Physical Sciences Physics
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	We present evidence for ultra-fast dissociation of molecular ammonia when photo-excited to the N1s→4a 1 core-hole state. This finding is based on resonant Auger spectroscopical results as well as qualitative arguments concerning the photon energy dependence of the Auger structures. Calculations of the excited state potential based on the Z+1 approximation were performed. Both the calculations and the measurements indicate that the most likely fragmentation pathway for the core excited ammonia molecules leads to NH 2 * and H fragments.
ISSN:	0009-2614 1873-4448