[Ifeffit] Origin of terminology "self-absorption"

["Dr. Dariusz A. Zając"]

  Hi all,
I think this comes from the misunderstanding of the effect and the try 
to explain it as the "additional" absorption of outgoing light. Am I right?
kicaj

W dniu 10-11-16 19:19, Scott Calvin pisze:
> 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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