Statistical Significance of Non-Reproducibility of Cross Sections in Dissipative Reactions |
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作者姓名: | 王琦 董玉川 李松林 田文栋 李志常 路秀琴 赵葵 符长波 刘建成 姜华 胡桂青 |
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作者单位: | [1]InstituteofModernPhysics,ChineseAcademyofSciences,Lanzhou730000 [2]GraduateSchool,ChineseAcademyofSciences,Beijing100039 [3]ChinaInstituteofAtomicEnergy,Beijing102413 |
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摘 要: | Two independent excitation function measurements have been performed in the reaction system of ^19F ^93Nb using two target foils of the same nominal thickness. We measured the dissipative reaction products at incident energies of 102 through 108 MeV with a step of 250ke V. The variance of energy autocorrelation functions of the reaction products was found to be three times of that originated from the randomized counting rates. By analysing the probability distributions of the deviations in the measured cross sections, we found that about 20% of all the deviations exceeds three standard deviations. This indicates that the non-reproduclbility of the cross sections in the two independent measurements is of a statistical significance but not originated from randomized fluctuation of counting rates.
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关 键 词: | 重离子碰撞 双核系统 本征激发能 反应截面 HI-13加速器 高斯分布 统计物理学 |
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