Self-diffusion coefficients for liquid methane obtained by the NMR spin-echo technique are reported at 110, 140 and 160 K. The density range extends to the freezing line at 110 and 140 K, and to 30 mol/dm3 at 160 K. Using the hard sphere diameter as a single temperature dependent parameter it...

It is shown that solitary-like excitations exist in the kinetic Ising model modified by the pseudospin-phonon interaction, at least in a particular case when the group, i.e. soliton velocity is equivalent to the phase velocity of constituent waves. The solitary waves arise due to both the...

The region of three-liquid-phase coexistence has been determined in the system water-acetonitrile-benzene-n-hexane at 80, 85, 88, 89, 89.3 and 89.4°C. A method of direct analysis of the coexisting phases by gas chromatography was used. The tricritical point, inferred from these data by...

We consider the two-dimensional Coulomb gas. To avoid the well-known collapse of the system below a certain temperature the Coulomb interaction is cut inside a core radius. In our statistical mechanical treatment we are able to formally describe the idea that oppositly charged ions tend to...

The shape of the coexistence surface of the system neon-xenon has been determined in great detail, in the neighbourhood of the critical line, by means of isobaric measurements. The critical line has a temperature-minimum, the so-called critical double point, at about 1040 bar, above which...

In this paper, the interface of a non-equilibrium two-phase system is viewed as a three-dimensional zone. A surface balance equation is obtained which is formally identical with that found in the usual approach wherein surface fields are postulated instead of being derived. Complete physical...

The kinetics of the formation of order is studied for both a system with non-conserved one-component order parameter and a binary mixture with conserved order parameter (“spinodal decomposition”). By a decoupling of two-point probabilities a closed kinetic equation for the structure factor...

A generalization of the percolation problem is proposed for disordered systems without a centre of inversion. Critical exponents are calculated in 5-ϵ dimensions. The structure of the infinite directed cluster is discussed.

A one-dimensional Lorentz-type model is studied where a point particle is reflected with some given probability p off randomly located fixed scatterers. The diffusion constant is calculated exactly, and the velocity autocorrelation is shown to decay like t−32, for 0p1. For finite times, there...