Newsgroups: sci.physics.plasma
From: Antonin Brablec <abr92@sci.muni.cz>
Subject: H alpha line profile
Message-ID: <34D86CEC.1F64@sci.muni.cz>
Sender: news@news.muni.cz (News Admin)
Organization: KFE, MU
Date: Wed, 4 Feb 1998 13:28:12 GMT


Dear colleagues,
we investigate a special type of corona discharge burning in liquid
water
and we try to estimate electron density and temperature from line shape
of
H alpha. We try to use the standard Griem's tables (impact broadening by
electrons and static broadening by ions) for fitting with the measured
line
profile in order to verify that such procedure can be also used in this
case.
However, the measured profile of H alpha is a little bit asymmetrical
and
so the fitting is not good (especially on wings). It could indicate that
other additional broadening effects can play important role.
So, we are interested in other broadenings like are resonant, van der
Waals,
etc. and in effect which can produce asymmetrical line shape. Do you
have
experience with the matter? We also looking for analytical formula of
the mentioned broadenings (or tabulated values or programs).
Can somebody advice us?
Thank you very much for any help and advice.
Sincerely Yours,
A.Brablec
Dep. of Physical Electronics
Masaryk University
Kotlarska 2
611 37 Brno, Czech Republic
e-mail: abr92@sci.muni.cz