Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

New Correction Procedure for X-Ray Spectroscopic Fluorescence Data: Simulations and Experiments

Published

Author(s)

J Ablett, Joseph Woicik, C C. Kao

Abstract

X-ray fluorescence spectroscopy is a widely used method for determining the electronic configuration and local structure of dilute species with high sensitivity. In the dilute limit, and for thin films, the x-ray fluorescence signal is directly proportional to the atomic sub-shell absorption coefficient. However, for concentrated samples, the well-documented self-absorption effect often leads to the severe suppression of XANES (X-ray Absorption Near-Edge Structure) and EXAFS (Extended X-ray Absorption Fine-Structure) amplitudes. Thus to recover the real value of the sub-shell absorption coefficient, it is important to apply correction procedures to the measured fluorescence spectra. In this paper, we describe a new straightforward method to correct for self-absorption effects (the difference in the measured fluorescence signal compared to that of the true sub-shell photoabsorption coefficient) in XANES and EXAFS fluorescence measurements. Using a variety of sample and detector configurations, this method is used to extract the sub-shell absorption coefficient on elemental nickel and thick single-crystals of Gd3Ga5O12 and LaA1O3.
Proceedings Title
Proceedings| 53rd Annual Conference| Advances in X-Ray Analysis
Volume
48
Conference Dates
August 2-6, 2004
Conference Location
Undefined
Conference Title
Proceedings of the 52nd Annual Denver X-Ray Conference

Keywords

EXAFS, Extended X-Ray Absorption Fine-Structure, self-absortion effect, sub-shell absorption coefficienct, X-Ray Absorption Near-Edge Structure, XANES

Citation

Ablett, J. , Woicik, J. and Kao, C. (2021), New Correction Procedure for X-Ray Spectroscopic Fluorescence Data: Simulations and Experiments, Proceedings| 53rd Annual Conference| Advances in X-Ray Analysis, Undefined (Accessed October 19, 2021)
Created October 12, 2021