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Title: Anharmonic correlated debye model debye-waller factor compared to einstein model result
Authors: Nguyen, Van Hung
Nguyen, Bao Trung
Keywords: einstein model result;Anharmonic correlated debye model
Issue Date: 2006
Publisher: H. : ĐHQGHN
Series/Report no.: Vol. 22;No. 2 (2006)
Abstract: An anharmonic correlated Debye model has been derived for vibrational amplitudes in the X-ray Absorption Fine Structure (XAFS). The model includes anharmonic effects based on Morse potential parameters. Analytical expression for Debye-Waller factor or second cumulant for different atomic shells has been derived. Numerical results for Cu approach those obtained by the anharmonic Einstein model. Both they contain zero-point contribution at low temperatures and linearly depend on the temperature at high temperatures as the classical limit values. They reflect the experimental results.
Description: p. 40-46
ISSN: 2588-1124
Appears in Collections:Mathematics and Physics

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