This paper briefly describes the theoretical deduction of the cross section of electron -ionimpact excitation in Coulomb -born approximation.
本文扼要阐述了在库仑波玻恩近似下，电子与离子碰撞激发截面的理论推导。
2
The utility model has the advantages of low deposition temperature, no high-energy ionimpact damage, large deposition area, simple operation, microcomputer programmed control, energy saving, etc.
具有淀积温度低，没有高能离子撞击损伤，淀积面积大，操作简单，微机程序控制，节约能源等优点。
3
By changing the nolch local ion of Charpy impact test specimens studied the effect of nolch location on toughness and cracking process in multi-layer welds.