摘要
用统计擦碎模型对中能区不同弹靶体系在弹核碎裂反应中的同位旋效应和同位旋标度率现象进行了系统研究.发现归一的同位素分布峰位差和约化的同位旋标度率参数随(Z_(proj)-Z)/Z_(proj) or(N_(proj)-N)/N_(proj)呈指数下降,与反应系统大小无关.指出约化的同位旋标度率参数可以用来研究中能重离子碰撞中反应系统的激发程度和非对称核物质的状态方程.
The isospin effect and isoecaling behaviors in projectile fragmentation reactions have been systematically investigated by a modified statistical abrasion-ablation (SAA) model. The normalized peak difference and reduced isoscaling parameters are found to decrease with (Zproj-z)/Zproj or(Nproj-N)/Nproj exponentially and have no dependence on the size of reaction systems. It is pointed out that the reduced isoscaling parameters can be used as an observable to study excitation extent of system and asymmetric nuclear equation of state in heavy ion collisions.
出处
《高能物理与核物理》
CSCD
北大核心
2007年第1期59-64,共6页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金(10405032,10535010,10405033,10475108,10328259,10135030)上海市科技启明星(06QA14062,05XD14021,03QA14066)国家重点基础研究发展规划项目(G200077404)资助~~
关键词
统计擦碎模型
弹核碎裂反应
同位旋效应
statistical abrasion-ablation model, fragmentation reaction, isospin effect