Deuteron and entropy production and the nuclear liquid-gas phase transition
Deuteron and entropy production and the nuclear liquid-gas phase transition
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DOI：
10.1103/physrevc.29.1735
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发表时间：
1984-05
影响因子：
3.1
通讯作者：
J. Kapusta
中科院分区：
文献类型：
--
作者：
J. Kapusta
从最近的轻碎片截面数据中推断出中能核碰撞中产生的热物质的熵。一个先前建议的模型是用来拟合的丰度的氘核，和氘核的配对包含在较高的质量集群，与一个单一的参数。该模型考虑了六维相空间中的有限密度效应。正如预期的那样，熵随能量单调上升，但即使在较低的能量下也保持相当高的熵。令人惊讶的是，测量的熵总是高于理论上预期的值（约3.3）在临界点的液体-气体相变，它被认为，仅取决于核物质状态方程的总体特征。
The entropy of hot matter produced in medium energy nuclear collisions is inferred from recent data on light fragment cross sections. A previously suggested model is used to fit the abundances of both the deuterons, and the deuteronlike pairings contained in higher mass clusters, with a single parameter. The model takes into account finite density effects in six-dimensional phase space. The entropy rises monotonically with energy, as expected, but remains rather high even at the lower energies. Surprisingly the measured entropy always lies above the theoretically expected value (about 3.3) at the critical point of the liquid-gas phase transition which, it is argued, depends only upon the gross features of the nuclear matter equation of state.