Berlin 2001 – scientific programme
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MO: Molekülphysik
MO 12: Posters Friday: Spectroscopy
MO 12.20: Poster
Friday, April 6, 2001, 12:30–15:00, AT3
Electron Energy Loss Spectroscopy of Dinitrogen pentoxide — •Paul Kendall1, Nigel Mason1, George Marston2, Gareth Buchanan2, and Jean-Luc Le Garrec3 — 1University College London, Department of Physics and Astronomy, Gower Street, London, WC1E 6BT, United Kingdom — 2University of Reading, Department of Chemistry, Whiteknights, PO Box 224 Reading, RG6 6AD, United Kingdom — 3Univ Rennes 1, CNRS, UMR 6627, Campus Beaulieu, F-35042 Rennes, France
Dinitrogen pentoxide is an important stratospheric reservoir of
the NOx family of gases that play a key role in stratospheric
ozone depletion. In the troposphere it is linked to the processes
that create and destroy the NO3 radical and is involved in
the transportation of NOx from colder to warmer regions of
the atmosphere. We have measured the absorption cross sections of
dinitrogen pentoxide (N2O5) in the range of 5 to 19 eV
using Electron Energy Loss Spectroscopy (EELS). We contrasted the
data obtained with a vacuum ultraviolet study in the range of 140
to 240 nm ( 5 to 9 eV). In this range the two data sets were in
good agreement. Above 9 eV, we observed a strong peak at 9.7 eV
and smaller scale structure between 11 and 13 eV. Little
structure was observed at the higher energy losses studied.