Nguyen Thi Minh Thuy
Faculty of Fundamental Sciences, University of Fire Prevention and Fighting, Hanoi 120602, Vietnam
DOI : https://doi.org/10.47191/ijmra/v7-i06-54Google Scholar Download Pdf
ABSTRACT:
The anharmonic X-ray absorption fine structure (XAFS) Debye-Waller (DW) factor of the crystalline tungsten (W) has been investigated in the temperature-dependent. This DW factor is calculated in explicit forms using the quantum anharmonic correlated Einstein model developed from the correlated Einstein model based on the anharmonic effective potential and the quantum statistical theory. The numerical results of W in the temperature range from 0 to 900 K are in good agreement with those obtained by the other theoretical models and experiments at several temperatures. The analytical results show that the anharmonic correlated Einstein model is suitable for analyzing the experimental XAFS data of metals.
KEYWORDS:XAFS DW factor, thermal disorders, crystalline tungsten, Einstein model
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