摘要
本文对BUU方程碰撞项中的核子-核子碰撞截面分别采用有介质和无介质两种情况下的数据,系统地计算了重离子碰撞中介质效应对于集体流的影响。从有介质核子碰撞截面和无介质核子碰撞截面随入射核子能量变化的规律合理地解释了介质效应对重离子碰撞横动量,流角等物理量的明显影响。分析这些影响可以看出在该能区和只考虑核子-核子弹性碰撞,π产生和π吸收的情况下介质效应与核物质状态方程的密切关系。
The sideways flow induced by heavy ion collision have been calculated in the framework
of BUU equation with and without medium in n-n collision. The medium effect on sideways
flow are important, And the addition of medium dependence to n-n collision cross section gi-
ves move sideways flow than that of free n-n collision at 1000 MeV/A. but less sideways flow
at 200 and 400 MeV/A due to the energy and density dependences of the elastic and inelastic
n-n cross section in the medium.
出处
《高能物理与核物理》
CSCD
北大核心
1991年第1期71-79,共9页
High Energy Physics and Nuclear Physics
基金
中国科学院重大课题基金
中国自然科学基金
