Determination of phase diagrams for the hard-core attractive Yukawa system

The phase diagram of a system consisting of hard particles with an attractive Yukawa interaction is computed by Monte Carlo simulation. From the results of these simulations we can estimate that the liquid-vapor coexistence curve disappears when the range of the attractive part of the Yukawa potential is less than approximately one-sixth of the hard-core diameter. The results of the simulations are compared with predictions based on first order perturbation theory.