^(19)F+^(27)Al反应产物的角分布、角分散与耗散机制

Angular Distributions and Angular Dispersions of the Dissipative Products in ^(19)F+^(27)Al Reaction

完成了114MeV19F+27Al深部非弹性碰撞产物的角分布测量.分析了反应产物B,C,N,O,F,Ne,Na,Mg和Al的实验室系角分布,讨论了反应形成的中间双核系统随时间演化过程中角分布所表现出的耗散特点.从实验上提取了反应产物各元素的角分散参数并作了角分散参数的理论拟合,讨论了角分散参数的物理意义以及角分散参数与耗散反应产物的电荷数Z之间的依赖关系.

Angular distributions of fragments B, C, N, 0, F, Ne, Na, Mg and Al induced from the reaction of 19F + 27Al have been measured at the beam incident energy of 114 MeV. The angular distributions and the element distributions at different angles were analyzed to provide an evolution process of the intermediate dinuclear system. The angular dispersion parameters were extracted from the experimental data and compared with the theoretical results. The dynamic dispersions for the dissipative products are not negligible and depend strongly on the charge number Z of the fragments, the deeper dissipation the more dynamic dispersion.