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首页> 外文期刊>International Journal of Quantum Chemistry >Electron-impact single ionization cross sections of helium isoelectronic systems
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Electron-impact single ionization cross sections of helium isoelectronic systems

机译:氦等电子系统的电子碰撞单电离截面

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摘要

The cross sections for electron-impact single ionization of helium-like targets,-Li+, B3+, C4+ N5+ O6+ Ne8+ Na9+, Fe24+, Ag45+, and U90+-are calculated using a recently propounded parameter-free relativistic binary encounter (RBEA) model, which remains valid up to the relativistic energy domain. Our RBEA results are compared with those of the Coulomb-Born (CB) approximation, distorted wave Born approximation (DWBA), relativistic two-potential DWBA (RTPD), the simple empirical model of Brenshtam et al. (BRY), and the model of Deutsch and Mark (DM) along with the available experimental data. The RBEA model, while keeping the comparable predictive power of cross sections, is found to overcome the limitations of the empirical BRY and DM models with their fitting parameters, and the quantum mechanical CB, DWBA, and RTPD theories with arduous and lengthy calculations. (C) 2004 Wiley Periodicals, Inc.
机译:使用最近提出的无参数相对论二元相遇(RBEA)模型来计算氦样靶标Li +,B3 +,C4 + N5 + O6 + Ne8 + Na9 +,Fe24 +,Ag45 +和U90 +的电子碰撞单电离的截面,在相对论能量域内仍然有效。我们的RBEA结果与库仑-伯恩(CB)近似,畸变波博恩近似(DWBA),相对论两势DWBA(RTPD),Brenshtam等人的简单经验模型进行了比较。 (BRY),以及Deutsch和Mark(DM)的模型以及可用的实验数据。 RBEA模型在保持横截面可比性的预测能力的同时,发现通过拟合参数克服了经验BRY和DM模型的局限性,并且通过艰巨而冗长的计算克服了量子力学CB,DWBA和RTPD理论的局限性。 (C)2004年Wiley Periodicals,Inc.

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