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利用自由中-质比研究对称能的高密行为
  • 期刊名称：高能物理与核物理
  • 时间：0
  • 页码：269-273
  • 语言：中文
  • 分类：O572.24[理学—粒子物理与原子核物理;理学—物理]
  • 作者机构：[1]中国科学院近代物理研究所,兰州730000, [2]兰州大学物理科学与技术科学学院,兰州730000, [3]中国科学院研究生院,北京100049, [4]兰州大学理论物理与交叉学科研究中心,兰州730000
  • 相关基金：国家自然科学重点基金（10575119,10235030）,中国科学院知识创新工程重要方向性项目（KJCX3-SYVC-N2）,国家重点基础研究发展规划项目（G2000077400）和国家科技部重大前期研究专项基金（2002CAB00200）资助
  • 相关项目：对称能高密度行为与重离子碰撞中同位旋效应的理论研究
作者： 雍高产|左维|张芳|
关键词： 输运模型IBUU04, 发射核子中-质比, 对称能, isospin- and momentum-dependent transport model IBUU04, free neutron-proton ratio, symmetry energy
中文摘要：

基于同位旋和动量依赖的强子输运模型IBUU04,采用两种具有不同密度依赖的对称能研究了^132Sn＋^124Sn反应系统在400MeV/A,600MeV/A,800MeV/A三种不同碰撞能量下中快度发射核子中-质比随横动量的变化关系．发现发射核子中-质比在低横动量端非常敏感于对称能,发射核子中-质比的强度随碰撞能量的降低而增强．并且发射核子中-质比对对称能的敏感性随着碰撞能量的增大而降低,在高横动量端尤为明显,在碰撞能量为400MeV/A时,自由核子中-质比对对称能的敏感性最为明显．

英文摘要：

Based on the isospin- and momentum-dependent transport model IBUU04, the transverse momentum distributions of the free neutron-proton ratio in the 132Sn-b124Sn reaction system at mid-central collisions with beam energies of 400/AMeV, 600/AMeV and 800/AMeV are studied by using two different symmetry energies. It is found that the free neutron-proton ratio as a function of the transverse momentum at the mid-rapidity is very sensitive to the density dependency of the symmetry energy especially at incident energies around 400/A MeV.

同期刊论文项目
对称能高密度行为与重离子碰撞中同位旋效应的理论研究
期刊论文 88
原子核非平衡动力学实验和理论研究
期刊论文 149 会议论文 12 著作 1
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