An interpolation formula for the longitudinal static susceptibility of the Heisenberg ferromagnet is derived. The result is shown to have correct temperature and magnetic field dependencies at low temperatures as well as in the vicinity of the Curie point.

In this paper we point out that a divergence in the viscosity of a supercooled liquid can be explained on the basis of two simple assumptions. First we assume that the structure function diverges at a non-zero value of the wavenumber. This is commonly referred to as the mean field assumption....

The coefficient of viscosity for a system consisting of square-well molecules has been determined, by means of computer simulation, in a density region ranging from the critical up to densities which are just below the fluid-solid phase transition. The inclusion of an attractive part in the...

The radiative decay of the Wannier exciton in thin crystal films is studied by the method of Heitler and Ma in the resonance approximation. It is shown that, while the broken crystal symmetry opens up the possibility of radiative decay, the correlation brought about by the interaction of the...

The complicated twelve-fold collision-integrals occurring in relativistic kinetic theory are reduced to sums of two-fold integrals which can easily be evaluated once the interactions of the particles of the system in question are specified.

Spectral densities of spherical harmonics arising from the rotational Brownian motion of molecules are calculated. The molecules are supposed to be spherical or linear, and account is taken of the influence of their inertia. When the results for a spherical molecule are applied to nuclear...

A strictly quantum-statistical theory of inhomogeneous reactions is presented. The treatment is based on the theory of multi-channel reactive scattering. For the configuration probabilities of the reactants a system of reaction-diffusion equations is obtained. The expressions for the diffusion...

The general formal expression for the wavevector- and frequency-dependent dielectric susceptibility tensor of a simple molecular crystal, derived in paper I, is applied to the case of a Bravais lattice with gyrotropic molecules. The dielectric susceptibility tensor is calculated with first-order...

The linear or phenomenological laws such as Ohm's law, Fourier's law and Fick's law are derived for a relativistic plasma in an electromagnetic field. It is shown that the choice of a reference frame as proposed by Landau and Lifshitz entails-in contrast to, for instance, the choice of...