[Ifeffit] N K-edge XANES, normalization parameters

[Peter Leinweber]

dear all,
i am a new XANES and ATHENA user. i didi N K-edge XANES of soil samples.
while feeling very good with data import, deglitching, truncation,
merging etc. i am insecure about parameters for normalization. 
in the attached project i did truncation of data before 395900 (it is
milli-eV), because these seem to be invalid, and i set an E-shift of
-900 sinc the beamline had -9.9 eV off compared to the N K-edge of N2
gas. in this way i should be right back on scale ? the i did set the
pre-edge parameters manually at start of the curve, and around 397000
since non of the previously measured N standard substances had edge
steps below this value. 
however, then i am insecure how to set the other parameters for
normalization properly. depending on how i play with the parameters
sometimes i get normalized spectra which look pretty reasonable,
sometimes the curves disappear completely from the graphics window, and
sometimes i get curves of a shape never senn in the literature. is there
easily understandable advice for the setting of the normalization
parameters available; or can anybody more experienced check my project
and give me recommendations.
thanks, peter

Prof. Dr. Peter Leinweber
Institute for Land Use
Universitaet Rostock
D-18051 Rostock

Present address:
Department of Soil Science
University of Saskatchewan
51 Campus Drive
SK S7N 5A8
Canada

phone: 001-306-966-6866
fax: 001-306-966-6881
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