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Effects of cluster correlations on fragment emission in C-12 + C-12 at 50 MeV/nucleon

机译:在50meV / nucleon中C-12 + C-12中碎片排放簇相关性的影响

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摘要

The effects of cluster correlations have been studied in the C-12 + C-12 reaction at 50 MeV/nucleon, using three antisymmetrized molecular dynamics (AMD) models, the AMD (AMD/D) without any additional cluster correlations, AMD/D-COALS with nucleon correlations based on a coalescence prescription for light cluster formations with A <= 4, and AMD-cluster with an extended cluster correlation in two-nucleon collision processes and a special treatment for intermediate fragment formation with A <= 9. The angular distributions and energy spectra of fragments have been simulated and compared with the available experimental data. It is found that the cluster correlations take a crucial role to describe the productions of light charged particles (LCPs) and intermediate mass fragments (IMFs), and the AMD-cluster studied here provides a consistent overall reproduction of the experimental data. It is also shown that the significant effects of the secondary decay processes are involved for the fragment production besides the dynamical productions in the AMD stage. Detailed LCP and IMF production mechanisms involved in the intermediate energy heavy ion collisions are discussed.
机译:在50 MeV/核子的C-12+C-12反应中,使用三种反对称分子动力学(AMD)模型研究了团簇关联的影响,AMD(AMD/D)没有任何额外的团簇关联,AMD/D-与核子关联的聚结,基于a≤4的轻团簇形成的聚结处方,AMD团簇在两个核子碰撞过程中具有扩展的团簇关联,并对a≤9的中间片段形成进行了特殊处理。对碎片的角分布和能谱进行了模拟,并与现有的实验数据进行了比较。研究发现,团簇关联对描述轻荷电粒子(LCP)和中等质量碎片(IMF)的产生起着至关重要的作用,本文研究的AMD团簇提供了实验数据的一致性整体再现。研究还表明,除了AMD阶段的动力学产物外,二次衰变过程对碎片的产生也有重要影响。详细讨论了中能重离子碰撞中LCP和IMF的产生机制。

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  • 来源
    《Physical review, C》 |2020年第6期|共12页
  • 作者单位

    Chinese Acad Sci Inst Modern Phys Lanzhou 730000 Peoples R China;

    Chinese Acad Sci Inst Modern Phys Lanzhou 730000 Peoples R China;

    Texas A&

    M Univ Inst Cyclotron College Stn TX 77843 USA;

    Tohoku Univ Dept Phys Sendai Miyagi 9808578 Japan;

    Chinese Acad Sci Inst Modern Phys Lanzhou 730000 Peoples R China;

    Chinese Acad Sci Inst Modern Phys Lanzhou 730000 Peoples R China;

    Chinese Acad Sci Inst Modern Phys Lanzhou 730000 Peoples R China;

    Chinese Acad Sci Inst Modern Phys Lanzhou 730000 Peoples R China;

    Chinese Acad Sci Inst Modern Phys Lanzhou 730000 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 原子核物理学、高能物理学;
  • 关键词

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