can ATR help us the understand the adsorption of molecules on the surface of alloy?
Attenuated Total Reflectance(ATR) is the measure of the total amount of attenuating radiation that can be reflected internally at certain radiation wavelengths by a certain material. In spectroscopy, ATR of different materials is found by use of the total internal reflectance property of solids and liquids. Spectroscopy uses infrared waves as they can penetrate dense materials.
If one wanted to understand the adsorption of electromagnetic waves, they would use this technique and measure the wavelengths of the reflected light to determine the natural wavelength spectra of the electrons in the atoms of the alloy. Radiation that is adsorbed has a frequency that matches that of the electrons in the material, which creates resonance within the atom, which then creates heat in the material. Any other radiation with differing frequencies simply vibrates the atoms and bounces off.
On the other hand, in the nuclear field, high energy radiation adsorption can be quantified by using albedo techniques for certain particles at different energies. Albedo describes the tendency of radiation to be reflected off of a surface and is represented as a dimensionless factor "alpha". This applies to certain radiation types and from energies ranging from ~0.5 to >100MeV.
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