290 A MeV ^(12)C诱发乳胶核反应靶核碎片前后关联研究  

Forward-backward multiplicity correlation of target fragments in ^(12)C-emulsion interactions at 290 A MeV

作　　者：杨文锦[1] 张东海[2] 

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

出　　处：《山西师范大学学报（自然科学版）》2014年第2期47-51,共5页Journal of Shanxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11054100)

摘　　要：对290 A MeV12C诱发乳胶不同靶核反应靶核碎片在前后半球内的平均多重数及关联进行了研究,结果表明靶核蒸发碎片、靶核反冲质子、重电离粒子在前后半球内的平均多重数及它们的前后产额比均随靶核大小的增加而增加;在前后半球内靶核蒸发碎片、靶核反冲质子、重电离粒子平均多重数均随后前半球内靶核蒸发碎片及靶核反冲质子数的增加而线性增加,这些结果均可以利用核-核碰撞几何模型来解释.The forward-backward multiplicity and correlations of target fragments in12C-emulsion interactions at 290 A MeV is investigated.It is found that the forward-backward averaged multiplicity of grey track particle,black track particle and heavily ionized track particle increases with the increase of target size.The averaged multiplicity of grey track particle,black track particle and heavily ionized track particle in forward and backward hemisphere increases linearly with the increase of the number of grey and black particle in backward and forward hemisphere respectively,and the saturation effect is observed in the correlations because of the limitation of target spectator size and the excited energy.The experimental results can be explained based on the geometrical picture of nucleus-nucleus interactions.

关 键 词：核乳胶 靶核碎片 多重数 关联 

分 类 号：O571.6[理学—粒子物理与原子核物理]