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几百兆电子伏特/核子能区原子核诱发乳胶核反应靶核蒸发碎片前后发射研究(英文)

杨瑞霞 徐明明 马田丽 张智 石瑞 张东海

杨瑞霞, 徐明明, 马田丽, 张智, 石瑞, 张东海. 几百兆电子伏特/核子能区原子核诱发乳胶核反应靶核蒸发碎片前后发射研究(英文)[J]. 原子核物理评论, 2016, 33(3): 274-280. doi: 10.11804/NuclPhysRev.33.03.274
引用本文: 杨瑞霞, 徐明明, 马田丽, 张智, 石瑞, 张东海. 几百兆电子伏特/核子能区原子核诱发乳胶核反应靶核蒸发碎片前后发射研究(英文)[J]. 原子核物理评论, 2016, 33(3): 274-280. doi: 10.11804/NuclPhysRev.33.03.274
YANG Ruixia, XU Mingming, MA Tianli, ZHANG Zhi, SHI Rui, ZHANG Donghai. Forward-backward Emission of Target Evaporated Fragments in Nucleus-emulsion Collisions at a few Hundred MeV/nucleon[J]. Nuclear Physics Review, 2016, 33(3): 274-280. doi: 10.11804/NuclPhysRev.33.03.274
Citation: YANG Ruixia, XU Mingming, MA Tianli, ZHANG Zhi, SHI Rui, ZHANG Donghai. Forward-backward Emission of Target Evaporated Fragments in Nucleus-emulsion Collisions at a few Hundred MeV/nucleon[J]. Nuclear Physics Review, 2016, 33(3): 274-280. doi: 10.11804/NuclPhysRev.33.03.274

几百兆电子伏特/核子能区原子核诱发乳胶核反应靶核蒸发碎片前后发射研究(英文)

doi: 10.11804/NuclPhysRev.33.03.274
基金项目: 国家自然科学基金资助项目(11075100);山西省自然科学基金资助项目(2011011001-2);山西省留学归国人员基金资助项目(2011-058)
详细信息
    通讯作者: 张东海,E-mail:zhangdh@dns.sxnu.edu.cn
  • 中图分类号: O571.6

Forward-backward Emission of Target Evaporated Fragments in Nucleus-emulsion Collisions at a few Hundred MeV/nucleon

Funds: National Natural Science Foundation of China(11075100); Natural Science Foundation of Shanxi Province (2011011001-2); Shanxi Provincial Foundation for Returned Overseas Chinese Scholars(2011-58)
  • 摘要: 对150 AMeV 4He-AgBr,290 AMeV 12C-AgBr,400 AMeV 12C-AgBr,400 AMeV 20Ne-AgBr及500 AMeV 56Fe-AgBr作用靶核蒸发碎片在反应前后半球内的多重数分布、多重数矩、标度方差、熵及约化熵分别进行了分析。实验结果表明,靶核蒸发碎片在前后半球内的多重数分布可以用高斯分布来描述。在前后半球内的多重数分布矩分别随秩数的增加而增加,且前后半球内多重数分布二阶矩与反应类型及束流能量无关。对于所有研究的核反应,其标度方差(一个直接描述多重数涨落的变量)值接近于1,表明在前后半球内靶核蒸发的发射存在较弱的关联。在前后半球内靶核蒸发碎片发射过程中的熵及约化熵在实验误差范围内与反应系统无关。

    The multiplicity distribution,multiplicity moment,scaled variance,entropy and reduced entropy of target evaporated fragments emitted in forward and backward hemispheres in 150 AMeV 4He-AgBr,290 AMeV 12C-AgBr,400 AMeV 12C-AgBr,400 AMeV 20Ne-AgBr and 500 AMeV 56Fe-AgBr interactions are investigated.It is found that the multiplicity distribution of target evaporated fragments emitted in both forward and backward hemispheres can be fitted by a Gaussian distribution.The multiplicity moments of target evaporated particles emitted in the forward and backward hemispheres increase with the order of the moment q,and the second-order multiplicity moment is energy independent over the entire energy range for all the interactions in the forward and backward hemisphere.The scaled variance,a direct measure of multiplicity fluctuations,is close to one for all the interactions,which indicate a weak correlation among the target evaporated fragments.The entropy of target evaporated fragments emitted in forward and backward hemispheres are the same respectively for all of the interactions,within experimental errors.
  • [1] POWELL C F,FOWLER P H,PERKINS D H.The Study of Elementary Particles by the Photographic Method[M].Pergamon,Oxford,1959:432.
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    [5] ZHANG Zhi,MA Tianli,ZHANG Donghai.Chin Phys C,2015,39:104002.
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    [7] ZHANG Donghai,CHEN Yanling,WANG Guorong,et al.Chin Phys C,2015,39:014001.
    [8] ZHANG Donghai,CHEN Yanling,WANG Guorong,et al.Nucl Phys Rew,2014,31(2):126.(in Chinese)(张东海,陈艳玲,王国蓉,等.原子核物理评论, 2014, 31(2):126.)
    [9] KOBA Z,NIELSEN H B,OLESEN P.Nucl Phys B,1972,40:317.
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    [11] SIMAK V,SUMBERA M,ZBOROVSKI I.Phys Lett B,1988,206:159.
    [12] GHOSH D,ROY J,SENGUPTA A G,et al.Can J Phys,1992,70:667.
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出版历程
  • 收稿日期:  2015-10-08
  • 修回日期:  2015-10-19
  • 刊出日期:  2016-09-20

几百兆电子伏特/核子能区原子核诱发乳胶核反应靶核蒸发碎片前后发射研究(英文)

doi: 10.11804/NuclPhysRev.33.03.274
    基金项目:  国家自然科学基金资助项目(11075100);山西省自然科学基金资助项目(2011011001-2);山西省留学归国人员基金资助项目(2011-058)
    通讯作者: 张东海,E-mail:zhangdh@dns.sxnu.edu.cn
  • 中图分类号: O571.6

摘要: 对150 AMeV 4He-AgBr,290 AMeV 12C-AgBr,400 AMeV 12C-AgBr,400 AMeV 20Ne-AgBr及500 AMeV 56Fe-AgBr作用靶核蒸发碎片在反应前后半球内的多重数分布、多重数矩、标度方差、熵及约化熵分别进行了分析。实验结果表明,靶核蒸发碎片在前后半球内的多重数分布可以用高斯分布来描述。在前后半球内的多重数分布矩分别随秩数的增加而增加,且前后半球内多重数分布二阶矩与反应类型及束流能量无关。对于所有研究的核反应,其标度方差(一个直接描述多重数涨落的变量)值接近于1,表明在前后半球内靶核蒸发的发射存在较弱的关联。在前后半球内靶核蒸发碎片发射过程中的熵及约化熵在实验误差范围内与反应系统无关。

The multiplicity distribution,multiplicity moment,scaled variance,entropy and reduced entropy of target evaporated fragments emitted in forward and backward hemispheres in 150 AMeV 4He-AgBr,290 AMeV 12C-AgBr,400 AMeV 12C-AgBr,400 AMeV 20Ne-AgBr and 500 AMeV 56Fe-AgBr interactions are investigated.It is found that the multiplicity distribution of target evaporated fragments emitted in both forward and backward hemispheres can be fitted by a Gaussian distribution.The multiplicity moments of target evaporated particles emitted in the forward and backward hemispheres increase with the order of the moment q,and the second-order multiplicity moment is energy independent over the entire energy range for all the interactions in the forward and backward hemisphere.The scaled variance,a direct measure of multiplicity fluctuations,is close to one for all the interactions,which indicate a weak correlation among the target evaporated fragments.The entropy of target evaporated fragments emitted in forward and backward hemispheres are the same respectively for all of the interactions,within experimental errors.

English Abstract

杨瑞霞, 徐明明, 马田丽, 张智, 石瑞, 张东海. 几百兆电子伏特/核子能区原子核诱发乳胶核反应靶核蒸发碎片前后发射研究(英文)[J]. 原子核物理评论, 2016, 33(3): 274-280. doi: 10.11804/NuclPhysRev.33.03.274
引用本文: 杨瑞霞, 徐明明, 马田丽, 张智, 石瑞, 张东海. 几百兆电子伏特/核子能区原子核诱发乳胶核反应靶核蒸发碎片前后发射研究(英文)[J]. 原子核物理评论, 2016, 33(3): 274-280. doi: 10.11804/NuclPhysRev.33.03.274
YANG Ruixia, XU Mingming, MA Tianli, ZHANG Zhi, SHI Rui, ZHANG Donghai. Forward-backward Emission of Target Evaporated Fragments in Nucleus-emulsion Collisions at a few Hundred MeV/nucleon[J]. Nuclear Physics Review, 2016, 33(3): 274-280. doi: 10.11804/NuclPhysRev.33.03.274
Citation: YANG Ruixia, XU Mingming, MA Tianli, ZHANG Zhi, SHI Rui, ZHANG Donghai. Forward-backward Emission of Target Evaporated Fragments in Nucleus-emulsion Collisions at a few Hundred MeV/nucleon[J]. Nuclear Physics Review, 2016, 33(3): 274-280. doi: 10.11804/NuclPhysRev.33.03.274
参考文献 (12)

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