The significance of fluorescence in transmission X-ray absorption spectroscopy and X-ray absorption fine structure

Abstract

We present a method to explore the effect of fluorescence on X-ray attenuation measurements obtained from X-ray absorption spectroscopy (XAS). We use the X-ray extended range technique-like method (XERT-like). The experimental setup includes different sized apertures to control the number of secondary X-rays entering the detector. Comparison of attenuation measurements produced with different aperture combination permit investigation of the effect of fluorescence radiation. In this work, fluorescence has a large impact on the attenuation measurements of thick zinc foils. The correction is energy-dependent and sample thickness-dependent and changes the structure and relative amplitudes of osc..