Experimental evidence for the rough hard sphere model of liquids by high pressure NMR

摘要: The NMR 19F spin–lattice relaxation times, self‐diffusion constants, and densities have been measured in liquid CCl3F as a function of temperature pressure. Since spin–rotation interactions provide the dominant mechanism for fluorine nucleus, analysis T1 data yields angular momentum correlation time τJ. density dependence enables us to calculate effective hard sphere diameter CFCl3. In turn these diameters are used calculation constants applying rough model molecular liquids recently proposed by Chandler. Our experimental results evidence (i) relationship between τJ Enskog τE; (ii) validity fluids; (iii) diffusion upon agreement with dynamics calculations Alder et al.