Theoretical study of shield effect in the momentum transfer dependence of the cross section
截面依赖动量转移条件下屏蔽效应的理论研究

The momentum transfer dependence of the cross section for electron impact ionization of helium for (e,2e) process is investigated by use of BBK model and modified BBK model. The results of the present work are compared with experimental data. The structure of the cross section is analysed, and the effective shield is discussed in detail in the final state.