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Resonant x-ray Scattering From the Surface of a Dilute Liquid Hg–Au Alloy

Published online by Cambridge University Press:  10 February 2011

E. DiMasi ,
H. Tostmann ,
B. M. Ocko ,
P. Huber ,
O. G. Shpyrko ,
P. S. Pershan ,
M. Deutsch  and
L. E. Berman
E. DiMasi*
Affiliation:
Department of Physics, Brookhaven National Laboratory, Upton NY 11973
H. Tostmann
Affiliation:
Div. of Eng. and Appl. Sci. and Dept. of Physics, Harvard University, Cambridge MA 02138
B. M. Ocko
Affiliation:
Department of Physics, Brookhaven National Laboratory, Upton NY 11973
P. Huber
Affiliation:
Div. of Eng. and Appl. Sci. and Dept. of Physics, Harvard University, Cambridge MA 02138
O. G. Shpyrko
Affiliation:
Div. of Eng. and Appl. Sci. and Dept. of Physics, Harvard University, Cambridge MA 02138
P. S. Pershan
Affiliation:
Div. of Eng. and Appl. Sci. and Dept. of Physics, Harvard University, Cambridge MA 02138
M. Deutsch
Affiliation:
Department of Physics, Bar-Ilan University, Ramat-Gan 52100, Israel
L. E. Berman
Affiliation:
National Synchrotron Light Source, Brookhaven National Laboratory, Upton NY 11973
*
*Corresponding author: dimasi@bnl.gov
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Abstract

We present the first resonant x-ray reflectivity measurements from a liquid surface. The surface structure of the liquid Hg-Au alloy system just beyond the solubility limit of 0.14at% Au in Hg had previously been shown to exhibit a unique surface phase characterized by a low-density surface region with a complicated temperature dependence. In this paper we present reflectivity measurements near the Au LIII edge, for 0.2at% Au in Hg at room temperature. The data are consistent with a concentration of Au in the surface region that can be no larger than about 30at%. These results rule out previous suggestions that pure Au layers segregate at the alloy surface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 590: Symposium R – Applications of Synchrotron Radiation Techniques…V , 1999 , 183
Copyright
Copyright © Materials Research Society 2000

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Footnotes

†

Present address: Department of Chemistry, University of Florida, Gainesville FL 32611

References

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