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Multinucleon transfer in the Xe-136+Pb-208 reaction

机译：XE-136 + PB-208反应中的多核转移

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摘要

The dynamic mechanics in the multinucleon transfer reaction Xe-136+ Pb-208 at an incident energy of E-c.m. = 450 MeV is investigated by using the improved quantum molecular dynamics model (ImQMD). The lifetime of the neck directly influences the nucleon exchange and energy dissipation between the projectile and the target. The total-kinetic-energy-mass distributions and excitation energy division of primary binary fragments and the mass distributions of primary fragments at different impact parameters are calculated. The thermal equilibrium between two reaction partners has been observed at the lifetime of a neck larger than 480 fm/c. By using the statistical decay code GEMINI to describe the de-excitation process of the primary fragments, the isotope production cross sections from Pt to At are compared with the prediction by the dinuclear system and GRAZING model. The calculations indicate that the GRAZING model is suitable for estimating the isotope production cross sections only for Delta Z = -1 to +2; the DNS + GEMINI calculations underestimate the cross sections in the neutron-rich and neutron-deficient regions; and the ImQMD + GEMINI calculations give reasonable predictions of the isotope production cross sections for Delta similar to Z = -3 to 0.
机译：多核转移反应XE-136 + PB-208中的动态力学在E-C.M.M的入射能中。使用改进的量子分子动力学模型（IMQMD）来研究450mEV。颈部的寿命直接影响射弹和目标之间的核子交换和能量耗散。计算初级二进制片段的总动能 - 质量分布和激发能量分布和不同冲击参数的初级片段的质量分布。在大于480 fm / c的颈部的寿命中观察到两个反应伙伴之间的热平衡。通过使用统计衰减码Gemini来描述初级片段的去激励过程，将来自PT到AT的同位素产生横截面与Dianclear系统和放牧模型的预测进行比较。计算表明放牧模型适用于仅适用于Delta Z = -1至+2的同位素生产横截面; DNS + Gemini计算低估了富中子和中子缺陷区域中的横截面;和IMQMD + Gemini计算的合理预测与Z = -3相似的δ同位素生产横截面的合理预测。

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  • 来源
    《Physical review, C》 |2016年第1期|共8页
  • 作者

    Li Cheng; Zhang Fan; Li Jingjing; Zhu Long; Tian Junlong; Wang Ning; Zhang Feng-Shou;

  • 作者单位

    Beijing Normal Univ Coll Nucl Sci &

    Technol Minist Educ Key Lab Beam Technol &

    Mat Modificat Beijing 100875 Peoples R China;

    Beijing Normal Univ Coll Nucl Sci &

    Technol Minist Educ Key Lab Beam Technol &

    Mat Modificat Beijing 100875 Peoples R China;

    Beijing Normal Univ Coll Nucl Sci &

    Technol Minist Educ Key Lab Beam Technol &

    Mat Modificat Beijing 100875 Peoples R China;

    Sun Yat Sen Univ Sino French Inst Nucl Engn &

    Technol Zhuhai 519082 Peoples R China;

    Anyang Normal Univ Sch Phys &

    Elect Engn Anyang 455000 Peoples R China;

    Guangxi Normal Univ Dept Phys Guilin 541004 Peoples R China;

    Beijing Normal Univ Coll Nucl Sci &

    Technol Minist Educ Key Lab Beam Technol &

    Mat Modificat Beijing 100875 Peoples R China;

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  • 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;
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