title: Accuracy evaluation in temperature-dependent EXAFS measurements of CdTe.
abstract: The evaluation of uncertainty in temperature-dependent EXAFS measurements is discussed, considering the specific case of a recent experiment performed on CdTe. EXAFS at both Cd and Te K-edges was measured at different times and at different beamlines in a temperature range from 5 to 300 K. Attention is focused on the nearest-neighbours parameters: bond thermal expansion, parallel and perpendicular mean-square relative displacements and the third cumulant. Different causes of uncertainty, a comparison of experimental results with theoretical models, the difference between EXAFS and crystallographic thermal expansions and the meaning of the third cumulant are discussed.
authors.affiliation: Dipartimento di Fisica, Università di Trento, I-38123 Povo (Trento), Italy.
authors.forename: N
authors.initials: N
authors.lastname: Abd El All
authors.forename: B
authors.initials: B
authors.lastname: Thiodjio Sendja
authors.forename: R
authors.initials: R
authors.lastname: Grisenti
authors.forename: F
authors.initials: F
authors.lastname: Rocca
authors.forename: D
authors.initials: D
authors.lastname: Diop
authors.forename: O
authors.initials: O
authors.lastname: Mathon
authors.forename: S
authors.initials: S
authors.lastname: Pascarelli
authors.forename: P
authors.initials: P
authors.lastname: Fornasini
keywords: Debye model; EXAFS; Einstein model; mean-square relative displacements; thermal expansion