核内△吸收截面  

In -mediumΔAbsorption Cross Section

作　　者：茅广军[1] 李祝霞[1] 卓益忠 赵恩广[1] 

机构地区：[1]中国科学院理论物理研究所,中国原子能科学研究院

出　　处：《高能物理与核物理》1996年第11期1053-1055,共3页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金;核工业部基金;中国博士后基金

摘　　要：在相对论ＢＵＵ方程框架内给出计算核内△吸收截面的严格公式．研究了核内△Ｎ→ＮＮ散射截面的介质效应，发现阈能附近的△吸收截面在介质中被压低．数值结果与ＴＡＰＳ实验组的最新实验结果符合得很好．An exact expression for calculating the in-medium A absorption cross section is obtained within the framework of the self-consistent relativistic BUU approach. The medium effects on the △N→ NN cross section is investigated, and it is found that the effective cross sation is suppressed in the medium near the threshold energy. The results are in a good agreement with the most recent experimental data of the TAPS collaboration.

关 键 词：相对论BUU 介质效应 核内Δ吸收截面 

分 类 号：O571.2[理学—粒子物理与原子核物理]