Dear all,
I am very new with GSAS and some confusions arrised to me during
refinement. I will be very much grateful if anyone helps me by giving the
explanations of the following facts..
1. what the parameter POLA stands for(is it polarization
factor??)? is it necessary
Hi, friend,
Following are my opinions due to my experience, responding to your questions:
1, In principle, POLA should not be refined. To get sensible value of POLA,
please just simply consult the technique support of your instrument or ask
colleagues who use radiation tubes of the same type.
Dear Dreele:
Your response about my comment 1 is convincing which i did not care much about.
Thanks for your correction.
i appologize to all for this incorrect comment.
Faithfully
Jun Lu
--
Lst. Prof. Lijie Qiao
Department of Materials Physics and Chemistry
University of Science and Tech
Dear all,
So, for the case of a brag brenteno diffractometer without any
monochromator, will the value for POLA should be fixed to zero??
Another problem is that, negative value is coming in trns when i am
refining it. is it physically acceptable?
On Aug 7, 2008, at 12:02 PM, [EMAIL PROTECTED] wrote:
So, for the case of a brag brenteno diffractometer without
any monochromator, will the value for POLA should be fixed to zero??
There are two GSAS polarization models (read the manual!), but my
recollection is that for IPOLA=0, P
Hi all,
The GSAS manual is great, and so is GSAS - but in the case of IPOLA and IPOL, I
have to admit that the GSAS manual is ambiguous, so I had to do the following
recently when I had to set up a new diffractometer:
Do a Google search on the word IPOLA, and the first entry will be a wonderf
Hello all,
We utilize a Mar 345 image plate to collect x-ray diffraction rings from powder
through a transmission configuration. It appears that the image plate generates
a large background that increases as 2theta angles increase. Does anyone know
of software or some type of procedure that I
