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中能重离子碰撞中参与者区域的粘滞系数与熵密度之比(英文)
  • ISSN号：1007-4627
  • 期刊名称：《原子核物理评论》
  • 时间：0
  • 分类：O571.6[理学—粒子物理与原子核物理;理学—物理]
  • 作者机构：[1]中国科学院上海应用物理研究所
  • 相关基金：National Natural Science Foundation of China(11035009,11220101005);National Basic Research Program of China(973 Program)(2013CB834405)~~
作者： 马余刚[1], 周铖龙[1], 方德清[1]
关键词： 剪切粘滞系数, 熵密度, 重离子碰撞, 输运模型
中文摘要：

在同位旋依赖的量子分子动力学(IQMD)和Boltzmann-Uehling-Uhlenbeck(BUU)的框架下研究了重离子碰撞过程中核物质的剪切粘滞系数与熵密度的比值。用不同的方法提取了剪切粘滞系数(η)、熵密度(s)和其他相关的物理量。随着碰撞能量的增加,粘滞系数和熵密度的比值在BUU模型中逐渐趋于一个饱和值而在IQMD模型中出现了一个极小值,认为这个局域的最小值或饱和值对应于中能重离子碰撞中发生的核物质液气相变现象。

英文摘要：

The ratio of shear viscosity (η) to entropy density (s) of nuclear fireball created in the central region of intermediate-energy heavy-ion collisions has been investigated within two transport models, namely the Boltzmann-Uehling-Uhlenbeck (BUU) model and the isospin-dependent quantum molecular dynamics (IQMD) model. Different methods are used to calculateηand s. With the collision energy increasing, theη/s displays a saturation value or a local minimum value at a certain beam energy. We argue that the saturation or minimum point corresponds to an occurrence of nuclear liquid gas phase transition.

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期刊信息
  • 《原子核物理评论》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国科学院近代物理研究所 中国核物理学会
  • 主编：肖国青
  • 地址：兰州市31号信箱
  • 邮编：730000
  • 邮箱：npr@impcas.ac.cn
  • 电话：0931-4969371/4
  • 国际标准刊号：ISSN：1007-4627
  • 国内统一刊号：ISSN：62-1131/O4
  • 邮发代号:54-183
  • 获奖情况:
  • 2009年1月获甘肃省优秀期刊奖
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:1602