论文部分内容阅读
在25MeV/u40Ar+115In、103Rh、93Nb反应中对三重碎裂事件做了测量.用10块25cm×20cm位置灵敏平行板雪崩计数器(PPAC)组成的探测系统对中等质量热核其出射角大于32°的三重碎片,做了关联测量.裂片总动能(TKE),三体与二体的产额比(P32),裂片质量、速度、关联角分布等量均由实验测得.从裂片质量比可粗略得到一个简单的经验表达式.利用一个简单的时—空模型对角关联函数进行模拟提取出了三体事件中两断点的时间差.在热核中P32相对于Z2/A表现出较好的系统性.
Triplet fragmentation events were measured in the 25MeV / u40Ar + 115In, 103Rh, 93Nb reaction. A 10x25x20cm position sensitive parallel plate avalanche counter (PPAC) was used to make a correlation measurement of a triplet fragment of medium-quality thermonuclear with an exit angle greater than 32 °. Total kinetic energy (TKE), yield ratio between three bodies and two bodies (P32), mass of lobes, velocity and correlation angle distribution were measured experimentally. A simple empirical expression can be roughly obtained from the mass ratio of the lobes. A simple time-space model is used to simulate the diagonal correlation function to extract the time difference between two breakpoints in a three-body event. P32 shows better systemicity with respect to Z2 / A in the thermonuclear.