摘要
应用参数化的最佳有效势方法,推广三体库仑波模型(3C)及动力学屏蔽的三体库仑波模型(DS3C模型)于Na原子,计算了共面双对称几何条件下,电子碰撞Na原子单电离的三重微分截面(TDCS),与最近Murray的测量数据、Hitawala等人的扭曲波近似(DWBA)及考虑极化的扭曲波近似(DWBAP)的理论结果进行了比较.发现,DWBA在低入射能量反映了实验结果,而3C计算在低入射能量时失效,DS3C计算对其有所改善.入射能量较高时DS3C及3C结果的角度分布优于DWBA,能够较好地定性描述上述碰撞过程.说明对于共面双对称几何条件下的电子碰撞多电子原子单电离过程,出射道三粒子间的动力学关联效应是比较强的.
Dynamically screened three-Coulomb-wave model（DS3C） is used to study the single ionization of the 3S orbital of sodium by electron impact.Triply differential cross-sections（TDCSs） are calculated in doubly symmetric geometry at excess energies of 6,10, 15,20,30,40,50 and 60 eV using a parameterized optimized effective potential.Comparisons are made between recently experimental data and theoretical predictions of the three-Coulomb wave function（3C） approach and distorted-wave Born approximation（DWBA）. The angular distribution of the present TDCS is found to qualitatively reproduce the reported experimental data.It is shown that dynamically screened effects are important in this geometry.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第9期172-176,共5页
Acta Physica Sinica
基金
山西省自然科学基金(批准号:20051008
2010011009)
山西省高校科技研究开发项目(批准号:20111011)资助的课题~~
关键词
动力学屏蔽
单电离
三重微分截面
dynamically screening effects
single ionization
triply differential cross section
