Seminar Ozean, Eis, Atmosphäre
Seminar Ozean, Eis, Atmosphäre |
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Termin: 11.12.2001
Referent/in:
Andreas Tewes, iup-Bremen
Title: Laser Induced Flash Photolysis
Flash photolysis is a technique which has
been invented in the late 1940's.
It has been widely used for kinetic studies of
fast chemical reactions in the gas phase.
An important field of application of the flash
photolysis is the examination of radical reactions.
Iodine radicals and iodine containing molecules
play a significant role in the depletion of ozone,
but their chemistry and their influence on the
chemistry of the troposphere and the lower
stratosphere is not clearly understood at the moment.
Experiments have been carried out on this topic in the
flash photolysis-lab of the IUP.
A short overview of this technique will be given.
In addition to the existing experimental setup an
excimer laser has been added as an alternative method
for the photolisation of the chemical systems.
The results of these activities and an overview about
the excimer laser-technique which has become an important
tool in basic research and in industrial applications
during the last 10 years will be presented.