290 AMeV ^(12)C诱发乳胶核反应末态粒子多重数关联  

Multiplicity Correlation of Produced Particles in ^(12)C Induced Nuclear Emulsion Reactions at 290 AMeV

作　　者：杨文锦[1] 郑素华[1] 郭桂芳[2] 张东海[3] 

机构地区：[1]太原工业学院理学系,太原030008 [2]山西师范大学临汾学院,山西临汾041000 [3]山西师范大学现代物理研究所,山西临汾041004

出　　处：《原子核物理评论》2016年第4期422-427,共6页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(11054100);山西省回国留学人员基金项目(2011-058);太原工业学院青年科学基金项目(2014LQ07)~~

摘　　要：对290 AMeV ^(12)C诱发乳胶核反应末态粒子间的多重数关联进行了研究。实验结果表明:黑径迹粒子、灰径迹粒子、重电离粒子多重数之间存在较强的关联,而且黑径迹粒子和重电离粒子多重数有饱和的趋势,这些特征与高能区实验结果一致;簇射粒子与其他粒子间的关联性较弱,这一特征与高能区实验结果不同,主要归因于弹核能量较低、簇射粒子产额较小;黑径迹粒子、灰径迹粒子在前后半球的平均多重数随靶核的增大而增加;实验结果可用基于碰撞几何的旁观体-反应体模型及级联蒸发模型来解释。We have investigated the multiplicity correlation of particles produced in 12C-emulsion interactions at 290 AMeV. It is found that there is a strong correlation between black track particle, grey track particle and heavily ionized track particle, and finally black track particles and heavily ionized track particles tend to saturation, which is the same as the experimental results observed at high energies. The multiplicity correlation between shower particle and other particles is weaker, which is different from the experimental results observed at high energies. This discriminating character can be explained by the lower energy of projectile. The productivity of shower particle is lower at intermediate energies compared to that at high energies. The forward-backward averaged multiplicity of black track particle and grey track particle increases with the increasing target size.

关 键 词：末态粒子 多重数关联 平均多重数 

分 类 号：O571.6[理学—粒子物理与原子核物理]