Synchrotron radiation as a source for quantitative XPS: advantages and consequences Page: 1 of 6
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SYNCHROTRON RADIATION AS A SOURCE FOR QUANTITATIVE XPS:
ADVANTAGES AND CONSEQUENCES
T. M. Rosseel and T. A. Carlson CONF-861019--4
Oak Ridge National Laboratory, Oak Ridge, TN 37831
R. E. Negri DE87 000389
Physical Electronics Division
Perkin Elmer Corporation, Eden Prairie, MN 55344
C. E. Beall and J. W. Taylor
Department of Chemistry
University of Wisconsin, Madison, WI 53706
Synchrotron radiation (SR) has a variety of properties which
make it an attractive source for quantitative X-ray photoelectron
spectroscopy (XPS). Among the most significant are high
intensity and tunability. For example, because it is a
continuous source (10 eV-20 keV) selected wavelengths may be
utilized to exploit the physical properties (e.g. cross section
and absorption edge) of the material or element under study. In
addition, the intensity of the dispersed radiation is comparable
to laboratory line sources (1). Synchrotron radiation is also a
clean source, i.e. it will not contaminate the sample, because it
operates under ultra-high vacuum conditions. We have used these
properties to demonstrate the advantages of SR as a source for
quantitative XPS. We have also found several consequences
associated with this source which can either limit it's use or
provide unique opportunities for analysis and research.
Using the tunability of SR, we have measured the energy
dependence of the 3p photoionization cross sections of Ti, Cr,
and Mn from 50 to 150 eV above threshold at the University of
Wisconsin's Tantalus electron-storage ring (2). In agreement
with theory, maxima were observed ti 100 eV above threshold.
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Rosseel, T. M.; Carlson, T. A.; Negri, R. E.; Beall, C. E. & Taylor, J. W. Synchrotron radiation as a source for quantitative XPS: advantages and consequences, article, January 1, 1986; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1061228/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.