Dear all, I am working on NiTi alloy thin films and crystal structure of the film has been characterized by XRD measurement. I need to calculate the interaction volume of X-ray in comparison to sample depth for NiTi film. How do I calculate the interaction volume?
Search for linear absorption and x-rays. I guess you will find hundreds of websites which will answer this question. Or have a look in the International Tables for Crystallography, Vol. C. There you can find very compressed everything you need to know about fundamental X-ray diffraction, except of all the books published over the last hundred years.
For example please have a look at my answer of a similar question here on RG.
https://www.researchgate.net/post/What_is_the_approximate_probing_depth_of_an_X-Ray
Appropriate attenuation coefficients can be found at NIST:
https://physics.nist.gov/PhysRefData/Xcom/html/xcom1-t.html
Click on 'Compond' and press 'Submit Information'
At the upcoming page type in your chemical formula ( here e.g. NiTi ),
put in your photon energy (Cu k alpha) 0.008 (it has to be in MeV) and exclude the standard energy grid; then press 'Submit Information'.
You can find your result at the column 'total attenuation with coherent scatter' as 1,182E+02cm²/g=118,2 cm²/g = µ/rho.
This value is the mass-attenuation coefficient µ/rho;
with µ as the linear attenuation coefficient and rho as the density of your material (e.g. NiTi).
When taking a reasonable value of rho you easily have access to µ and you can proceed further on.
But in general Gert Nolze is right: please get familar with linear x-ray attenuation (Lambert beer equation) and you will be soon easily able the do similar calculation(s) by yourself.
Good luck
I don´t know if I understand the question. The "interaction volume" is the "volumen of the sample" iluminated by x-rays? If that is the case you need to know the dimensions of the x-ray beam. Also the mass atenuation coefficient for your compound as it was explained by previous collegues.
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