Reconstruction Procedure for 3D Micro X-ray Absorption Fine Structure
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- 作者：Lars L眉hl ; Ioanna Mantouvalou ; Wolfgang Malzer ; Ina Schaumann ; Carla Vogt ; Oliver Hahn ; Birgit Kanngie脽er
- 刊名：Analytical Chemistry
- 出版年：2012
- 出版时间：February 21, 2012
- 年：2012
- 卷：84
- 期：4
- 页码：1907-1914
- 全文大小：399K
- 年卷期：v.84,no.4(February 21, 2012)
- ISSN：1520-6882
文摘
A new approach for chemical speciation in stratified systems using 3D Micro-XAFS spectroscopy is developed by combining 3D Micro X-ray Fluorescence Spectroscopy (3D Micro-XRF) and conventional X-ray Absorption Fine Structure Spectroscopy (XAFS). A prominent field of application is stratified materials within which depth-resolved chemical speciation is required. Measurements are collected in fluorescence mode which in general lead to distorted spectra due to absorption effects. Developing a reliable reconstruction algorithm for obtaining undistorted spectra for superficial and in-depth layers is proposed and validated. The developed algorithm calculates the attenuation coefficients of the analyte for the successive layers facilitating a new spectroscopic tool for three-dimensionally resolved nondestructive chemical speciation.