[Ifeffit] Regarding time resolved XAS

[Bruce Ravel]

On 05/30/2016 02:20 AM, mazhar iqbal wrote:
> I want to ask about the aligning the XAS spectra that is given in
> Athena. Can we do the alignment of time resolved spectra? As you know
> that the resolved spectra (IR pump X-ray probe) may have edge shift due
> to laser pumping. Do you think that the same method of the alignment can
> be applied here as well. An additional piece of information is that  we
> have a reference fluorescence line always on the screen that well behind
> the K absorption edge.

Well, you have told us what you have tried nor what problem you are 
actually facing.  If the question is "does Athena help you align data?" 
  I think you already know that the answer is yes.

I don't understand the business about a "fluorescence line always on the 
screen".  How do you propose to use that to align your XAS data?

In the case of a situation where you are purposefully changing the 
chemical state of the sample, then you need to have some absolute 
reference by which to perform the alignment -- a reference spectrum 
measured simultaneously, an encoder reading on the monochromator, 
something that allows you to do the chore.

You question is a bit vague and open-ended.  Without more information or 
a more focused question, I don't know how to help you further.

B


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  Bruce Ravel  ------------------------------------ bravel at bnl.gov

  National Institute of Standards and Technology
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