超核γ谱学研究进展  

Progress in Gamma-ray Spectroscopy of Hypernuclei

作　　者：周书华[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《原子核物理评论》2002年第1期30-34,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目 ( 19875 079)~~

摘　　要：近年来 ,在7ΛLi超核γ谱学实验中 ,通过基态二重态间自旋翻转M1跃迁能量的测定 ,为ΛN自旋 自旋相互作用强度提供了重要的信息 ;通过对约化跃迁几率B(E2 ;7ΛLi 5 / 2 + → 1/ 2 + )的测定 ,表明7ΛLi中的6Li核心比自由空间中6Li核要小 ,Λ超子的胶样作用引起了7ΛLi核的收缩 .The recent progress in gamma-ray spectroscopy of hypernuclei is described. The spin-flip M1 γ transition between the ground-state spin doublet of 7 ΛLi has been observed. The transition energy provides crucial information on the strength of the spin-spin intetraction between Λ and nucleons. The experimental result of B(E2; 7 ΛLi 5/2 +→1/2 +) gives evidence that the size of the 6Li core in 7 ΛLi is smaller than that for the 6Li nucleus in the free space, indicating that the glue-like effect of Λ caused the shrinkage of the 7 ΛLi nucleus.

关 键 词：∧N自旋-自旋相互作用 胶样作用 超子 超核 收缩 Γ谱学 

分 类 号：O571.23[理学—粒子物理与原子核物理] O572.34[理学—物理]