Does amplitude reduction factor of EXAFS have a strong temperature dependence?

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Abdul Ahad Popular answer

No, amplitude reduction factor is temperature independent term and it is take care of remaining electron when one is ejected basically it is configurational relaxation. If it changes with temperature then you cant find the actual coordination number and scattering strength of particular path.

Regards

A. Ahad

Gerhard Martens

In general there is a temperature dependence.

This article may help you;

but, sorry, I have got no full text ...

https://iopscience.iop.org/article/10.1088/0022-3719/12/13/011/pdf

You will find there hints to calulate the temperature dependence.

According to the diploma thesis of W. Böhmer, there is almost no temperature dependence of (delta sigma)² in the range of 0 to about 100K and beyond a quite linear increase with T for the investigated samples. The above mentioned paper is the public version of his thesis.

Abdul Ahad

We may talk about different things,

but temperature dependence of EXAFS amplitudes is introduced in the EXAFS description via the Debye-Waller factor exp(-sigma²*k²) and describes the k-dependence of EXAFS amplitudes caused by the relative vibrational motion of the atom pairs of interest.

There is a lot of experimental evidence that there is a temperature dependence of that term. Please google...

Dear Prof. Gerhard Martens yes we are talking about different things. But question is related to the S0^2 not the sigma. your point regarding MSRD (sigma_exafs) is absolutely right.

Hyunseok oh

Thank you for the kind answers! Abdul Ahad Gerhard Martens . Yes my question was about amplitude reduction factor. Abdul Ahad could you introduce me some papers related to your explanation?