J. Phys. IV France 7 (1997) C2-241-C2-242
Comparing Peak Asymmetries in EXAFS using RMC and Cumulant Expansion Data AnalysisG.E. van Dorssen1, B.T. Williams2, S.J. Gurman2 and F. Bridges3
1 CCLRC Daresbuty Laboratory, Warrington WA4 4AD, UK
2 Dept. of Physics, University of Leicester, Leicester LEI 7RH, UK
3 Physics Dept., University of California, Santa Cruz, California 95064, U.S.A.
EXAFS measurements on RbBr at the Br absorption edge and different ternperature were carried out. Conventional analysis of the data using the Daresbury EXCURV92 code shows with increasing temperature a decrease in nearest neighbour distance. Also large differences are found in the coordination numbers for k and k3 weighted EXAFS with increasing temperature. Using cumulant expansion when fitting the data results in a small increase in nearest neighbour distance with temperature, as expected from thermal data.
© EDP Sciences 1997