奇特原子核^(6，8)He的电荷形状因子研究(英文)  

Study on Charge Form Factors of the Exotic Nuclei ^(6,8)He

作　　者：王再军[1] 任中洲[2] 

机构地区：[1]天津工程师范学院数理系,天津300222 [2]南京大学物理系

出　　处：《高能物理与核物理》2007年第11期1032-1039,共8页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金项目(10675090,10125521,10535010);天津工程师范学院科研启动基金项目(KYQD05009)资助

摘　　要：应用相对论Eikonal近似计算了用不同模型给出的^(6,8)He的电荷半径和电荷分布的形状因子,并将结果与~6He和~4He的实验结果进行了比较.结果显示不同模型给出的电荷半径和电荷形状因子差别很大,表明不同模型给出的晕中子与α核芯的关联有很大的差异.计算和讨论结果为在下一代电子-原子核对撞机上可能进行的实验提供了理论参考,同时,也为现有讨论奇特原子核的理论模型提供了检验.Charge radius and charge form factors of different charge density distributions for ^6,8He are calculated with the relativistic Eikonal approximation. Detailed comparisons and discussions are presented. It is found that the charge form factors curves of ^6,8He are much lower than the experimental ones of ^4He. This is, in principle, consistent with the experimental fact. Whereas detailed comparison among the charge form factors which correspond to different charge distributions show significant deviations. This indicates that the effects of the correlations between the halo neutrons and the α-core in ^6,8He with different charge density distributions are quite different. This result would provide a useful reference for the possible experiments on the next-generation electron-nucleus collider and for the tests of different theoretical models for the exotic nuclei ^6＇8He.

关 键 词：电荷形状因子 ^6 8He 相对论Eikonal近似 相对论平均场模型 

分 类 号：O571[理学—粒子物理与原子核物理]