TITLE

EXAFS and thermal expansion

AUTHOR(S)
Dalba, G.; Fornasini, P.; Grisenti, R.; Rocca, F.
PUB. DATE
May 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 514 Issue 1, p148
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The sensitivity of EXAFS to thermal expansion has been experimentally studied on several crystals: Ge, CdSe, and AgI. In no case does the first cumulant reproduce the thermal expansion, owing to relative atomic vibrations normal to the bond. By converse, EXAFS can give original information on the average perpendicular relative displacement <Δu ⊥2>. The thermal expansion of germanium can be determined from the 3rd cumulant, provided that quantum effects are taken into account. For CdSe and AgI, on the contrary, the 3rd cumulant does not reproduces the thermal expansion. © 2000 American Institute of Physics.
ACCESSION #
6029311

 

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