Mass Transfer： a Deciding Factor for the Multiplicity of an Event in Deep Inelastic Collisions

Intermediate stage of the three and four-pronged events is investigated in the reaction ^208Pb＋^197Au at beam energy 11.67 MeV/u. Multiprong events are analysed numerically using an empirical mass-dependent velocityrauge relation. Using the measured three-dimensional coordinates of correlated tracks, it is possible to determine the quantities such as mass transfer and total kinetic energy loss. These quantities are then used to study the intermediate stage of the reaction. It has been observed that mass transfer and total kinetic energy loss at the first step of the reaction decides the multiplicity of an event at the second stage of the sequential fission process.

可测量的裂变径迹封闭长度分布与重离子打孔参数的关系

为了得到真实的裂变径迹封闭长度分布，需要对重离子径迹密度、孔径及裂变径迹长度进行几率归一修正。对重离子蚀刻径迹与裂变径迹相重叠的几率进行了理论计算及MonteCarlo模拟。