Физика Низких Температур: Том 48, Выпуск 2 (Февраль 2022), c. 129-132 ( к оглавлению , назад )
Translational vibrations in α-N2 from x-ray data
L.А. Аlekseeva1, E. S. Syrkin1, D. E. Hurova1, N. A. Aksenova1,2, N. N. Galtsov1, and S. B. Feodosyev1
1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine Kharkiv 61103, Ukraine
2Ukrainian State University of Railway Transport, Kharkiv 61050, Ukraine
Received July 20, 2021, published online December 24, 2021
Using the x-ray diffraction method, the mean square displacement of solid nitrogen molecules from its lattice point in α phase was determined. The temperature dependences of the amplitude of translational vibrations of nitrogen molecules are obtained in the isotropic approximation. Our experimental values were compared with the theoretical data, and qualitative difference was found. This discrepancy can be explained by the fact that the geometry of the molecule is not considered in theoretical models.
Key words: x-ray diffraction, molecular solid, temperature factor, Debye’s theory, mean square displacement.