Statistical mechanical calculation of the surface properties of simple liquid. I. The distribution function g₍₁₎(z)

Abstract

The singlet density profile rho Lg(1)(z) at the liquid-vapour interface of argon at the triple point is determined by numerical evaluation of a modified Born-Green-Yvon equation. The resulting density transition is not monotonic but exhibits an oscillation. The possibility exists that certain simple liquid systems, particularly the liquid metals, could show pronounced density oscillations in the vicinity of the interface at the triple point. The monotonic profile is regained as the critical point is approached.