Effect of Molecular Rotational Degrees of Freedom on Mechanical and Thermodynamic Properties of Solid Methane at Temperatures above 50 K. (7th October 2014)

• Record Type: Journal Article
• Authors: Leont'eva, Antonina V.; Prokhorov, Andrew Yu.; Zakharov, Anatoly Yu.; Erenburg, Alexander I.
• Other Names: Sizyuk Tatyana Academic Editor.
• Is Part Of: Journal of experimental Physics. Volume 2014(2014)
• Publication Date: 2014-10-07
• Subjects: Physics -- Experiments -- Periodicals; Physics -- Experiments; Electronic journals; Periodicals; 530
• DOI: 10.1155/2014/127050
• Languages: English
• ISSNs: 2356-7368

Abstract

Abstract : The paper presents an analysis of extensive data set of mechanical, structural, thermophysical, and spectral properties of solid methane in the temperature interval 0.5 · T tr – T tr ( T tr is the triple point temperature) under equilibrium vapor pressure. It is shown that the anomalies of the studied properties (or lack of reliable data) at temperatures 60–70 K have been observed in the body of the reviewed papers. We proposed that the observed anomalies are due to a transition between classical and quantum regimes of collective rotational degrees of freedom of methane molecules in this temperature interval.