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Multilayer Mirror Fluorescence Detection System for Photon-In Photon-Out In-Situ Carbon K-Edge NEXAFS

Published

Author(s)

Daniel A. Fischer, S Sambasivan, A Kuperman, Y Platonov, J L. Wood

Abstract

Photon-in photon-out in-situ soft x-ray absorption measurements of catalytic carbon chemistry are now possible by the development of a high efficiency near normal incidence focusing multiplayer mirror detection system for carbon K-edge fluorescence yield. Fluorescence yield x-ray absorption spectroscopy of the low Z elements C, N, O, and F is a powerful tool for understanding the local structure and chemistry of diverse materials, even in the prescence of reactive atmospheres 1,2,3,4,5. This technique uses tunable monochromatic synchrotron radiation in the soft x-ray region to excite inner shell electrons to unoccupied molecular orbitals, providing both elemental tunability and chemical state sensitivity in complex systems (also called Near Edge X-ray Absorption Fine Structure, NEXAFS)6. By monitoring carbon fluorescence yield during soft x-ray absorption, a photon-in photon-out spectroscopy has been developed for in-situ single crystal surface science experiments involving chemisorption, displacement, and dehydrogenation 3,7,8,9,10.
Citation
Synchrotron Radiation News
Volume
15

Keywords

detectors, multilayers, NEXAFS, soft x-ray

Citation

Fischer, D. , Sambasivan, S. , Kuperman, A. , Platonov, Y. and Wood, J. (2002), Multilayer Mirror Fluorescence Detection System for Photon-In Photon-Out In-Situ Carbon K-Edge NEXAFS, Synchrotron Radiation News (Accessed April 15, 2024)
Created May 1, 2002, Updated February 19, 2017