Relaxation of a simple molten salt near the liquid-gas transition

Abstract

The relaxation behaviour of mass- and charge-density correlations of a model molten salt is investigated within the recent LBGS theory (1984) of the liquid-glass transition. The scaling equation describing the liquid dynamics near the glass transition point is solved numerically. Deviations from the simple exp(-at^beta )-Kohlrausch relaxation are found for very long times, and it is shown that the scaling functions decay with an exponent beta =1 asymptotically. The ionic conductivity at finite wavenumbers vanishes as epsilon ^gamma (1+ alpha omega ²+. . .) as the transition is approached.