首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Functional form of the repulsive potential in the high pressure region
Authors:VYu Bardic  NP Malomuzh  VM Sysoev
Institution:

aDepartment of Molecular Physics, Kyiv University, 6 Acad. Glushkov Prosp., Kyiv, 03022, Ukraine

bDepartment of Theoretical Physics, Odessa University, 2 Dvoryanskaya str., Odessa, 65026, Ukraine

Abstract:The present work is devoted to the analysis of the functional form of the repulsive potential in the framework of soft-sphere model. We used two different approaches which were based on the treatment of an equation of state and spectra of molecular light scattering at large shifts of frequencies. In particular, it has been shown that the density dependence of pressure at P>103 MPa allowed to calculate the steepness exponent of the repulsive potential as a fitting parameter of the equation of state which possesses reliable extrapolation properties under extrapolating experimental PVT data in the high-pressure region. Processing of experimental data on a base of the statistical equation of state reveals the temperature dependence of the steepness parameter. The similar situation is also typical for the light scattering spectra. So for argon the value of this parameter varies from 15 to 10 in the gas phase and up to 24–28 in the liquid phase. The results obtained with the help of the equation of state and molecular light scattering spectra correlate well.
Keywords:Repulsive potential  High-pressure region  Soft-sphere model
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号