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近垒及垒下能区28Si+174Yb体系的裂变碎片质量分布

王东玺 林承键 贾会明 杨峰 徐新星 杨磊 马南茹 孙立杰 包鹏飞 张焕乔 刘祖华

王东玺, 林承键, 贾会明, 杨峰, 徐新星, 杨磊, 马南茹, 孙立杰, 包鹏飞, 张焕乔, 刘祖华. 近垒及垒下能区28Si+174Yb体系的裂变碎片质量分布[J]. 原子核物理评论, 2017, 34(3): 534-538. doi: 10.11804/NuclPhysRev.34.03.534
引用本文: 王东玺, 林承键, 贾会明, 杨峰, 徐新星, 杨磊, 马南茹, 孙立杰, 包鹏飞, 张焕乔, 刘祖华. 近垒及垒下能区28Si+174Yb体系的裂变碎片质量分布[J]. 原子核物理评论, 2017, 34(3): 534-538. doi: 10.11804/NuclPhysRev.34.03.534
WANG Dongxi, LIN Chengjian, JIA Huiming, YANG Feng, XU Xinxing, YANG Lei, MA Nanru, SUN Lijie, BAO Pengfei, ZHANG Huanqiao, LIU Zuhua. Research of Fission Fragment Mass Distribution for 28Si+174Yb at Energies near the Coulomb Barrier[J]. Nuclear Physics Review, 2017, 34(3): 534-538. doi: 10.11804/NuclPhysRev.34.03.534
Citation: WANG Dongxi, LIN Chengjian, JIA Huiming, YANG Feng, XU Xinxing, YANG Lei, MA Nanru, SUN Lijie, BAO Pengfei, ZHANG Huanqiao, LIU Zuhua. Research of Fission Fragment Mass Distribution for 28Si+174Yb at Energies near the Coulomb Barrier[J]. Nuclear Physics Review, 2017, 34(3): 534-538. doi: 10.11804/NuclPhysRev.34.03.534

近垒及垒下能区28Si+174Yb体系的裂变碎片质量分布

doi: 10.11804/NuclPhysRev.34.03.534
基金项目: 国家重点基础研究发展计划(973计划)项目(2013CB834404);国家自然科学基金资助项目(11375268,11475263,U1432246,U1432127,11505293,11635015)
详细信息
    作者简介:

    王东玺(1990-),河北唐山人,硕士研究生,从事粒子物理与原子核物理研究,E-mail:wangdongxi@ciae.ac.cn

    通讯作者: 林承键,E-mail:cjlin@ciae.ac.cn
  • 中图分类号: O571.53

Research of Fission Fragment Mass Distribution for 28Si+174Yb at Energies near the Coulomb Barrier

Funds: National Basic Research Program of China(2013CB834404); National Natural Science Foundation of China(11375268,11475263,U1432246,U1432127,11505293,11635015)
More Information
    Corresponding author: 10.11804/NuclPhysRev.34.03.534
  • 摘要: 使用两块大面积平行板雪崩计数器,测量了近垒及垒下28Si+174Yb熔合裂变碎片质量-角度关联分布及质量分布。质量-角度二维图显示在该反应能量区间内并没有发现明显的准裂变成分。运用单高斯曲线拟合了裂变碎片的质量分布并抽取了质量宽度。结果表明:在库仑势垒以上,质量宽度随着反应能量的升高而增大;在库仑势垒以下能区,发现质量宽度随着反应能量的降低而呈现轻微增大的趋势。运用鞍点统计模型对本次实验数据拟合发现,需用比文献给出的更大的刚度系数才能重现实验结果,其物理原因还需要进一步研究。


    In order to study the fission mechanism, the mass distributions and mass-angle distributions of the fission fragments for 28Si+174Yb were measured near the Coulomb barrier. The mass-angle correlations do not indicate any possible quasi-fission events in this bombarding energy range. The mass distributions were fitted by the single Gaussian distribution and then the mass widths were extracted. At above-barrier energies, the mass widths were found to increase with the energy. However, the mass widths show slight increase with decreasing energy below the barrier. Additionally, the mass widths can not be reproduced in the framework of the saddle statistic model with the given parameter, so further study is still needed.
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出版历程
  • 收稿日期:  2016-12-07
  • 修回日期:  2017-03-27
  • 刊出日期:  2017-07-18

近垒及垒下能区28Si+174Yb体系的裂变碎片质量分布

doi: 10.11804/NuclPhysRev.34.03.534
    基金项目:  国家重点基础研究发展计划(973计划)项目(2013CB834404);国家自然科学基金资助项目(11375268,11475263,U1432246,U1432127,11505293,11635015)
    作者简介:

    王东玺(1990-),河北唐山人,硕士研究生,从事粒子物理与原子核物理研究,E-mail:wangdongxi@ciae.ac.cn

    通讯作者: 林承键,E-mail:cjlin@ciae.ac.cn
  • 中图分类号: O571.53

摘要: 使用两块大面积平行板雪崩计数器,测量了近垒及垒下28Si+174Yb熔合裂变碎片质量-角度关联分布及质量分布。质量-角度二维图显示在该反应能量区间内并没有发现明显的准裂变成分。运用单高斯曲线拟合了裂变碎片的质量分布并抽取了质量宽度。结果表明:在库仑势垒以上,质量宽度随着反应能量的升高而增大;在库仑势垒以下能区,发现质量宽度随着反应能量的降低而呈现轻微增大的趋势。运用鞍点统计模型对本次实验数据拟合发现,需用比文献给出的更大的刚度系数才能重现实验结果,其物理原因还需要进一步研究。


In order to study the fission mechanism, the mass distributions and mass-angle distributions of the fission fragments for 28Si+174Yb were measured near the Coulomb barrier. The mass-angle correlations do not indicate any possible quasi-fission events in this bombarding energy range. The mass distributions were fitted by the single Gaussian distribution and then the mass widths were extracted. At above-barrier energies, the mass widths were found to increase with the energy. However, the mass widths show slight increase with decreasing energy below the barrier. Additionally, the mass widths can not be reproduced in the framework of the saddle statistic model with the given parameter, so further study is still needed.

English Abstract

王东玺, 林承键, 贾会明, 杨峰, 徐新星, 杨磊, 马南茹, 孙立杰, 包鹏飞, 张焕乔, 刘祖华. 近垒及垒下能区28Si+174Yb体系的裂变碎片质量分布[J]. 原子核物理评论, 2017, 34(3): 534-538. doi: 10.11804/NuclPhysRev.34.03.534
引用本文: 王东玺, 林承键, 贾会明, 杨峰, 徐新星, 杨磊, 马南茹, 孙立杰, 包鹏飞, 张焕乔, 刘祖华. 近垒及垒下能区28Si+174Yb体系的裂变碎片质量分布[J]. 原子核物理评论, 2017, 34(3): 534-538. doi: 10.11804/NuclPhysRev.34.03.534
WANG Dongxi, LIN Chengjian, JIA Huiming, YANG Feng, XU Xinxing, YANG Lei, MA Nanru, SUN Lijie, BAO Pengfei, ZHANG Huanqiao, LIU Zuhua. Research of Fission Fragment Mass Distribution for 28Si+174Yb at Energies near the Coulomb Barrier[J]. Nuclear Physics Review, 2017, 34(3): 534-538. doi: 10.11804/NuclPhysRev.34.03.534
Citation: WANG Dongxi, LIN Chengjian, JIA Huiming, YANG Feng, XU Xinxing, YANG Lei, MA Nanru, SUN Lijie, BAO Pengfei, ZHANG Huanqiao, LIU Zuhua. Research of Fission Fragment Mass Distribution for 28Si+174Yb at Energies near the Coulomb Barrier[J]. Nuclear Physics Review, 2017, 34(3): 534-538. doi: 10.11804/NuclPhysRev.34.03.534
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