A tool to plan photon-in/photon-out experiments: Count rates, dips and self-absorption

Abstract

A program that helps to plan experiments where the emitted X-rays are detected is presented. The tool is based on the standard formula for fluorescence-detected X-ray absorption spectroscopy and uses tabulated parameters to estimate count rates. The objective is to evaluate the feasibility of an experiment, estimate the influence of self-absorption on the spectral shape and investigate the possibility of range-extended EXAFS. The occurrence of negative edges, i.e. a decrease in the detected signal, is discussed. © 2012 International Union of Crystallography Printed in Singapore-all rights reserved.