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活性靶技术熔合截面测量极限研究

季炼程 张宁涛 林炜平 唐晓东

季炼程, 张宁涛, 林炜平, 唐晓东. 活性靶技术熔合截面测量极限研究[J]. 原子核物理评论, 2018, 35(2): 119-126. doi: 10.11804/NuclPhysRev.35.02.119
引用本文: 季炼程, 张宁涛, 林炜平, 唐晓东. 活性靶技术熔合截面测量极限研究[J]. 原子核物理评论, 2018, 35(2): 119-126. doi: 10.11804/NuclPhysRev.35.02.119
JI Liancheng, ZHANG Ningtao, LIN Weiping, TANG Xiaodong. A Study of the Energy Limit for Measuring Fusion Cross Sections with the Active Target Technique[J]. Nuclear Physics Review, 2018, 35(2): 119-126. doi: 10.11804/NuclPhysRev.35.02.119
Citation: JI Liancheng, ZHANG Ningtao, LIN Weiping, TANG Xiaodong. A Study of the Energy Limit for Measuring Fusion Cross Sections with the Active Target Technique[J]. Nuclear Physics Review, 2018, 35(2): 119-126. doi: 10.11804/NuclPhysRev.35.02.119

活性靶技术熔合截面测量极限研究

doi: 10.11804/NuclPhysRev.35.02.119
基金项目: 国家重点研发计划项目(2016YFA0400501);国家自然科学基金联合基金项目(U1632142)
详细信息
    作者简介:

    季炼程(1992-),男,安徽芜湖人,硕士研究生,从事粒子物理与原子核物理研究;E-mail:jlc@impcas.ac.cn

    通讯作者: 唐晓东,E-mail:xtang@impcas.ac.cn
  • 中图分类号: O571.1

A Study of the Energy Limit for Measuring Fusion Cross Sections with the Active Target Technique

Funds: National Key Research and Development Program of China (2016YFA0400501); National Natural Science Foundation of China (U1632142)
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  • 文章访问数:  492
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  • PDF下载量:  123
  • 被引次数: 0
出版历程
  • 收稿日期:  2018-04-13
  • 修回日期:  2018-05-15
  • 刊出日期:  2018-06-20

活性靶技术熔合截面测量极限研究

doi: 10.11804/NuclPhysRev.35.02.119
    基金项目:  国家重点研发计划项目(2016YFA0400501);国家自然科学基金联合基金项目(U1632142)
    作者简介:

    季炼程(1992-),男,安徽芜湖人,硕士研究生,从事粒子物理与原子核物理研究;E-mail:jlc@impcas.ac.cn

    通讯作者: 唐晓东,E-mail:xtang@impcas.ac.cn
  • 中图分类号: O571.1

摘要: 天体环境中丰中子核素熔合反应率对研究中子星表面超级暴现象的点火机制有重要意义。由于次级束流强过低,无法使用传统固体靶实验技术测量垒下熔合反应截面。活性靶技术的发展为垒下丰中子核素熔合反应截面的测量提供了可行的途径。基于Geant4模拟详细地分析了多重采样电离室(MUSIC)与时间投影室(TPC)两种活性靶探测器中熔合反应与弹性散射的运动学性质,给出了4种熔合反应鉴别判据,并且计算了由这些判据误判引起的熔合截面系统误差。在Ecm=13.6 MeV时,MUSIC与TPC的弹性散射误判截面分别为0.5 mb和2.9×10-3 mb,都远小于此时熔合截面(877 mb)。在垒下,MSUIC的熔合截面系统误差已经超出实验测量要求,而TPC能够进行实验测量的能量可以降低至Ecm=4.7 MeV。


Reaction rates of fusion reactions among neutron-rich nuclei in the astrophysical environment are of great significance to understand the ignition of superbursts on neutron stars. Since beam intensity is rather low for radioactive ion beams, it is extremely difficult to operate a direct measurement for cross sections of such fusion reactions below the Coulomb barrier using thick target technique. In this case, a novel technique, active target technique, has been developed recently. To study the energy limit for measurement below Coulomb barrier, the kinematics of elastic scattering and fusion reaction in MUSIC and TPC are discussed with Geant4 simulation. Four identification methods are used and uncertainties of cross sections resulted from misjudgments are calculated. With Ecm=13.6 MeV, the uncertainties of cross sections for MUSIC and TPC are 0.5 mb and 2.9×10-3 mb, respectively. The uncertainties for MUSIC become far beyond measurement when below coulomb barrier, while TPC remains to be a suitable detector for measuring fusion cross sections until Ecm=4.7 MeV.

English Abstract

季炼程, 张宁涛, 林炜平, 唐晓东. 活性靶技术熔合截面测量极限研究[J]. 原子核物理评论, 2018, 35(2): 119-126. doi: 10.11804/NuclPhysRev.35.02.119
引用本文: 季炼程, 张宁涛, 林炜平, 唐晓东. 活性靶技术熔合截面测量极限研究[J]. 原子核物理评论, 2018, 35(2): 119-126. doi: 10.11804/NuclPhysRev.35.02.119
JI Liancheng, ZHANG Ningtao, LIN Weiping, TANG Xiaodong. A Study of the Energy Limit for Measuring Fusion Cross Sections with the Active Target Technique[J]. Nuclear Physics Review, 2018, 35(2): 119-126. doi: 10.11804/NuclPhysRev.35.02.119
Citation: JI Liancheng, ZHANG Ningtao, LIN Weiping, TANG Xiaodong. A Study of the Energy Limit for Measuring Fusion Cross Sections with the Active Target Technique[J]. Nuclear Physics Review, 2018, 35(2): 119-126. doi: 10.11804/NuclPhysRev.35.02.119
参考文献 (13)

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