2013 3:31 PM
To: Allen, Douglas R.
Cc: rietveld_l@ill.fr
Subject: Re: "N Beta" in TOPAS Full Axial Model
From the Tech Ref:
[axial_n_beta #20]: Define the number of rays emanating from a point X-ray
source in
the axial plane. Larger values for axial_n_beta increases both accuracy
From the Tech Ref:
[axial_n_beta #20]: Define the number of rays emanating from a point X-ray
source in
the axial plane. Larger values for axial_n_beta increases both accuracy and
calculation time.
Looks like Alan is doing some sort of ray tracing to calculate the peak
profiles.
On 20 December 2
Can anyone tell me the meaning and possible setting for the "N Beta" item in
the Full Axial Model on the Instrument Parmeters page of TOPAS. We have always
used a setting of 20 but I have no idea why or what it means.
++
Please do NOT a
Roberto R. de Avillez napisał(a):
Hi Lukasz,
You are talking about fundamental parameters approach to Rietveld as
proposed by Alan Coelho (CHEARY, R. W. e COELHO A., J. Appl. Cryst.,31,
1998, 851-861. ) The sample length is the length of the sample measured in
the axial direction (in mm). It
Hi Lukasz,
You are talking about fundamental parameters approach to Rietveld as
proposed by Alan Coelho (CHEARY, R. W. e COELHO A., J. Appl. Cryst.,31,
1998, 851-861. ) The sample length is the length of the sample measured
in the axial direction (in mm). It is the illuminated area, so it must
Hello to all!
My name's Lukasz Kruszewski, my interest recently is the mineralogy of
burning coal dumps. I'm trying to obtain the unit cell parameters of some
members of the alunite group, analysed on Bruker D5005 diffractometer (Co
Ka, Bragg-Brentano, RS = 0.6mm wide, FDS = 1 deg.) with use f
