【摘要】 本文基于Bohr-Lindhard(B-L)模型,考虑了碰撞双方的电子密度分布,计算了能量为20~900keV/u的B2+、C3+、N4+及O5+等类锂离子与He原子碰撞中的单电子丢失(SEL)、伴随单电离的单电子丢失(SELSI)、伴随双电离的单电子丢失(SELDI)等截面对能量的依赖曲线,计算结果与已有的实验数据符合较好。分析发现,对于一给定的过程,较重的离子有较小的有效碰撞参数范围;对于同一种入射离子,SEL、SELSI和SELDI等过程对应的有效碰撞参数范围依次减小。更多还原

【Abstract】 The cross sections for single-electron loss(SEL),single-electron loss associated with single ionization(SELSI)and single-electron loss associated with double ionization(SELDI)in collisions of lithium-like ions B2+,C3+,N4+ and O5+ with helium atom in the energy range from 20 to 900keV/u were calculated by considering the distribution of both target and projectile electrons based on the Bohr-Lindhard(B-L)model.The calculated results were compared with the available experimental data.The analysis shows that the heavier the ion,the smaller the impact parameter for a given process and the impact parameters for SEL,SELSI and SELDI decrease successively for a given ion.更多还原