M. Kasrai1, Zhanfeng Yin1, G.M. Bancroft1, K. H. Tan2
1Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
2Canadian Synchrotron Radiation Facility, University of Wisconsin-Madison, Stoughton, Wisconsin 53589
Tóm tắt
High-resolution (≤0.2 eV) x-ray absorption near edge structure (XANES) spectra have been recorded at the Si, P, and S 2p edges of several compounds using microchannel plates to detect the ultrasoft x-ray fluorescence after 2p excitation or ionization. The fluorescence yield (FY) XANES of SiO2, Si, InP, FeS2, and Na2S2O3 are of at least as good quality as the XANES recorded using total electron yield (TEY), despite the extremely small fluorescence yield. The FY spectra obtained show two significant advantages over the TEY spectra. First, the FY XANES is much more bulk sensitive; and second the resolution of the FY spectra is usually considerably better.
