摘要
在不同碰撞参数下，应用量子分子动力学模型对３０ＭｅＶ／ｕ４０Ｃａ＋４０Ｃａ碰撞系统进行了计算，观察到周边碰撞ｂ＝６ｆｍ时碰撞系统产生的中等质量碎片最多，发现这是由于碰撞过程中“ｎｅｃｋ”碎裂造成的，同时还发现“ｎｅｃｋ”结构形成过程中碰撞系统相对密度涨落增长较慢，饱和值较小，体现了形状不稳定性的特征。
Under different impact parameters, the collision system of 30MeV/u 40 Ca +40 Ca is investigated in terms of QltllD model. It is .shown that the number of IMFs is the largest at impact pararneter b=6fm, which is due to the formation of 'neck' in collision process. Meanwhile, it is found the. in the process of fonmadon of 'neck', the growth of the relative density fluctuation of the reaction system is very slow and the saturation value is small, which imply the character of shape instability.
出处
《高能物理与核物理》
CSCD
北大核心
1997年第11期1018-1023,共6页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
中国科学院LWTZ-1298经费资助
关键词
重离子反应
中等质量碎片
碰撞系统
neck碎裂
'neck' fragmentation, intemediaie mass fragment, relative density fluctuation, shape instability, dynamics instability.
