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在前角测量了30MeV/u40Ar+159Tb反应中两裂片符合下的轻粒子和复杂碎片,利用线性动量转移和总横向动量方法对三体符合事件进行了碰撞参数分类。实验结果表明,在中心碰撞中复杂碎片主要来自于平衡类靶核的统计发射,并伴随有非平衡中途成份;而周边碰撞中前角区复杂碎片主要来自于弹核碎裂成份。在半中心碰撞中则存在类弹、类靶和中途三种成份。
In the anterior horn, the light particles and complex debris that coincide with the two lobes in the 30MeV / u40Ar + 159Tb reaction were measured. The collision parameters of the three-body coincident events were classified by linear momentum transfer and total lateral momentum. The experimental results show that the complex debris in the central collision mainly comes from the statistical emission of the equilibrium target nucleus and is accompanied by the unbalanced mid-course component. In the peripheral collision, the complex debris in the front-corner region mainly comes from the nuclear fragmentation. In the semi-center collision, there are three types of bombs, targets and half-way components.