标题： 完全可解模型对于核液体-气体相变的应用 显示英文标题

标题： Exactly Soluble Model for Nuclear Liquid-Gas Phase Transition

摘要： 研究了处于多裂变状态的核物质的热力学性质，采用了统计模型的一个简化版本。对于巨正则系综已经找到了精确的解析解。以热力学自洽的方式考虑了 excluded volume 效应。在热力学极限下，该模型表现出一级液-气相变，并具有特定的混合相特性。还研究了包括 Fisher 项在内的模型扩展。证明了在临界点或高于临界点处可能发生二级相变。讨论了相图不同区域中的碎片质量分布。 显示英文摘要

摘要： Thermodynamical properties of nuclear matter undergoing multifragmentation are studied within a simplified version of the statistical model. An exact analytical solution has been found for the grand canonical ensemble. Excluded volume effects are taken into account in the thermodynamically self-consistent way. In thermodynamic limit the model exhibits a first order liquid-gas phase transition with specific mixed phase properties. An extension of the model including the Fisher's term is also studied. The possibility of the second order phase transition at or above the critical point is demonstrated. The fragment mass distributions in the different regions of the phase diagram are discussed.