1985 Volume 54 Issue 9 Pages 3277-3288
The model of one-dimensional gas (proposed in the preceding paper I) of molecules with hard cores, with short-range interactions given by a nearest-neighbour (repulsive or attractive) square potential and with infinitely-long-range interactions given by the attractive potential −2a⁄L (a=positive constant, L=length of the gas, L→∞ with length per molecule fixed) is rigorously treated at the absolute zero; especially its phase transitions are investigated. It is deduced that, at the absolute zero, this model in the case of repulsive short-range interaction exhibits two transitions (the gas-liquid and the liquid-solid transition) if the long-range attraction is weak enough, and exhibits only one transition (the gas-solid transition) if the long-range attraction is strong enough, and this model in the case of attractive short-range interaction exhibits only one transition (the gas-solid transition).
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