Isotopic and microcanonical temperatures in nuclear multifragmentation
Isotopic and microcanonical temperatures in nuclear multifragmentation
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DOI：
10.1103/physrevc.58.27
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发表时间：
1998-05
影响因子：
3.1
通讯作者：
J. Bondorf;A. Botvina;I. Mishustin
中科院分区：
文献类型：
--
作者：
J. Bondorf;A. Botvina;I. Mishustin
本文在统计多重碎裂模型的基础上，系统地比较了不同同位素温度与多重碎裂系统的临界温度。结果表明，同位素温度强烈影响的热初级碎片的二次衰变和粒子稳定的激发态在最终的碎片的人口。最近由ALADIN组测量的He-Li温度，作为激发能和束缚电荷的函数都被相当好地再现。我们的分析证实了核热量曲线的异常。
A systematic comparison of different isotopic temperatures with the thermodynamical temperature of a multifragment system is made on the basis of the statistical multifragmentation model. It is demonstrated that isotopic temperatures are strongly affected by the secondary decays of hot primary fragments and the population of particle-stable excited states in final fragments. The He-Li temperatures, measured recently by the ALADIN group, are reproduced fairly well both as a function of excitation energy and bound charge. Our analysis confirms the anomaly in the nuclear caloric curve.