Dear All, I was going to post this directly to Bruce, but the website asks for feedback to be directed to the list, so here it is. I'm a novice Athena user, but so far have found it to work very well for my needs. What I am writing about is that I have a problem with the CLnorm background routine: when there is a pre-edge peak present the edge is assigned to this peak position, instead of to the true edge position. I have attached a sample spectrum that shows exactly what I mean. Is there any way to work around this? Is it a limitation of the software or a bug? Is it even a problem? ...see, novice! :) It is particularly surprising to me because the marker (orange circle) shows the E0 position correctly, but the CLnorm routine is ignoring this...which is why I'm suspicious that it could be a bug. If CLnorm used this E0 position for its edge then everything would be well. I'm not jumping up and down in despair here as AutoBK will serve my immediate needs for now, but for what I want to do I am suspecting that CLnorm will be better*. Thanks again for a great program and all of the development work that has gone into it, Ash *open to suggestions as to why I am wrong about this. -- --- Ashley Norris Experimental Petrology Department of Earth Sciences Oxford University, UK --- ashley.norris@earth.ox.ac.uk --- +44 1865 272 051 ---
Hi Ashley,
I'm sure it could be better, but I'm not exactly sure I'd call it a
bug -- the CL norm procedure uses the tabulated data from
Cromer-Libermann, including the nominal edge energies. But the goal
of the procedure is to do normalization, not really to do a complete
background subtraction....
It probably should be possible to shift the energy of the CL background.....
--Matt
On Fri, Feb 10, 2012 at 5:13 AM, Ashley Norris
Dear All,
I was going to post this directly to Bruce, but the website asks for feedback to be directed to the list, so here it is.
I'm a novice Athena user, but so far have found it to work very well for my needs. What I am writing about is that I have a problem with the CLnorm background routine: when there is a pre-edge peak present the edge is assigned to this peak position, instead of to the true edge position. I have attached a sample spectrum that shows exactly what I mean.
Is there any way to work around this? Is it a limitation of the software or a bug?
Is it even a problem? ...see, novice! :)
It is particularly surprising to me because the marker (orange circle) shows the E0 position correctly, but the CLnorm routine is ignoring this...which is why I'm suspicious that it could be a bug. If CLnorm used this E0 position for its edge then everything would be well.
I'm not jumping up and down in despair here as AutoBK will serve my immediate needs for now, but for what I want to do I am suspecting that CLnorm will be better*.
Thanks again for a great program and all of the development work that has gone into it,
Ash
*open to suggestions as to why I am wrong about this.
-- --- Ashley Norris Experimental Petrology Department of Earth Sciences Oxford University, UK --- ashley.norris@earth.ox.ac.uk --- +44 1865 272 051 ---
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participants (2)
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Ashley Norris -
Matt Newville