类硼离子的电子碰撞电离截面  

ELECTRON IMPACT IONIZATION CROSS SECTIONS OF BORON-LIKE IONS

作　　者：方渡飞[1] 王炎森[1] 胡畏[1] 高海滨[1] 陆福全[1] 

机构地区：[1]复旦大学物理二系,上海200433

出　　处：《物理学报》1993年第1期40-45,共6页Acta Physica Sinica

基　　金：国家自然科学基金

摘　　要：运用扭曲波玻恩交换近似对处于Hartree-Fock基态的类硼离子的电子碰撞直接电离截面进行了计算。电离过程中直接电离与交换电离振幅的干涉有重要的贡献。研究结果表明“自然相因子”近似比“最大干涉”近似要好。后者用于其它离子种类的计算与实验符合很好。同Moores等人的Coulomb-Born近似计算相比较,我们的计算结果与现有的实验数据符合有改进。By using a distorted-wave Born exchange approximation, the direct ionizarion cross section of boron-like ions by electron impact have been calculated. The interferences between direct and exchange amplitudes make important contribution in the process of ionization. The calculated results indicate that the 'Natural Phase' approximation is better than the 'Maximum Interference' approximation, while the latter agrees better with experiments for some other species of ions. Compared with Coulomb-Born approximation of Moores et al., our calculation gives better agreement with the experiment data available.

关 键 词：离子 碰撞电离 碰撞截面 类硼离子 

分 类 号：O562.4[理学—原子与分子物理]