Isospin Physics in Heavy-Ion Collisions at Intermediate Energies
Isospin Physics in Heavy-Ion Collisions at Intermediate Energies
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DOI：
10.1142/s0218301398000087
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发表时间：
1997-07
期刊：
影响因子：
--
通讯作者：
Bao-An Li;C. Ko;W. Bauer
中科院分区：
文献类型：
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作者：
Bao-An Li;C. Ko;W. Bauer
在由稳定或放射性丰中子核引起的核碰撞中，可以产生具有明显的同位旋不对称性以及热和压缩激发的核物质的瞬态。这为研究对称核物质和纯中子物质之间区域的核物质性质提供了可能。本文综述了近年来有关同位旋非对称核物质物态方程的理论研究及其与中子星和放射性核性质的关系。研究了非对称核物质的化学和力学不稳定性以及液-气相变。本文综述了介质中不同同位旋态的核子-核子碰撞截面，它们对放射性束流诱导重离子碰撞动力学有重要影响。然后，我们讨论了一个同位旋相关的输运模型，其中包括不同的平均场势和截面的质子和中子，及其应用。
In nuclear collisions induced by stable or radioactive neutron-rich nuclei a transient state of nuclear matter with an appreciable isospin asymmetry as well as thermal and compressional excitation can be created. This offers the possibility to study the properties of nuclear matter in the region between symmetric nuclear matter and pure neutron matter. In this review, we discuss recent theoretical studies of the equation of state of isospin-asymmetric nuclear matter and its relations to the properties of neutron stars and radioactive nuclei. Chemical and mechanical instabilities as well as the liquid-gas phase transition in asymmetric nuclear matter are investigated. The in-medium nucleon-nucleon cross sections at different isospin states are reviewed as they affect significantly the dynamics of heavy ion collisions induced by radioactive beams. We then discuss an isospin-dependent transport model, which includes different mean-field potentials and cross sections for the proton and neutron, and its applic...