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实验对25MeV／u~(40)Ar＋~(209)Bi体系的裂变反应，利用线性动量转移的分窗选择不同的激发能，研究裂变动能分布和质量分布与热核初始激发能的关系．实验证实激发能小于380MeV时裂变总动能分布与低激发能复合核相似．激发能大于380MeV时，最可几动能呈现出随激发增加而增加，并出现高能非对称性，而且质量分布宽度随激发能增加而迅速增大．
The fission reactions of 25MeV / u ~ (40) Ar + ~ (209) Bi system were investigated experimentally. Different excitation energies were selected by linear shift of momentum transfer to study the relationship between the fission kinetic energy distribution and the initial excitation energy of the thermonuclear. Experiments show that when the excitation energy is less than 380MeV, the fission total energy distribution is similar to that of the low excitation energy complex nucleus. When the excitation energy is larger than 380 MeV, the most kinetic energy shows an increase with the increase of excitation and a high energy asymmetry, and the mass distribution width increases rapidly with the increase of excitation energy.