【摘要】 利用大面积位置灵敏气体探测器对 35MeV u4 0Ar +197Au反应中形成的裂片进行了符合测量 ,由此得到了裂变复合核的速度分布 .在大质量转移假设下扣除前平衡发射粒子的影响 ,得到复合核的激发能 .另外利用望远镜探测器对反应中出射的轻带电粒子也进行了符合测量 ,并由后角α ,p ,d ,t的能谱提取了复合核的温度 .温度与激发能的关系没有表现出理论预言的相变特征 .更多还原

【Abstract】 The fission fragments in the reaction of 40Ar+ 197Au have been measured coincidently with light charged particles at 35MeV/u by using large area position sensitive detectors and Si-detectors. The velocities of the fissioning compounds are deduced based on the fragments and the excitation energies of the compounds calculated with a hypothesis of massive transfer and taking into account the influence of pre-equilibrium emission of light particles. As the same time,the temperatures of the compounds are extracted by using the energy spectra of the backward light charged particles measured coincidently with fission fragments. The temperature-excitation energy curve does not present the behaviour predicted by the theories.更多还原