It's definitely a misnomer. I use "overabsorption" and encourage others to do
so. I suppose to track it down would require going
back over the seminal papers on the subject.
mam
On 11/16/2010 10:19 AM, Scott Calvin wrote:
Hi all,
As some of you know, I'm currently working on a textbook on XAFS analysis.
Because of that, I'm going to occasionally pose some questions for the list
that may seem a bit random. I hope none of you mind me using the list in this
way; the questions may seem to come out of left field, but I think they will
still be of interest to many.
With that said, here's my question for today:
What is the origin of the use of "self-absorption" to describe the suppression of
fine-structure observed in thick, concentrated samples measured in fluorescence? I understand the
physics of the effect itself, my question is the curious wording. Compared to a thin concentrated
sample, the effect might better be described as "saturation," while compared to a thick
dilute sample, it's actually related to a lack of absorption by other elements.
--Scott Calvin
Faculty at Sarah Lawrence College
Currently on sabbatical at Stanford Synchrotron Radiation Laboratory
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