Frozen Core Approximation and Nuclear Screening Effects in Single Electron Capture Collisions

被引：7

作者：

Harris, Allison ^{[1
]}

机构：

[1] Illinois State Univ, Phys Dept, Normal, IL 61790 USA

来源：

ATOMS | 2019年 / 7卷 / 02期

基金：

美国国家科学基金会;

关键词：

electron capture; charge transfer; frozen core approximation; DOUBLE-CHARGE-EXCHANGE; DIFFERENTIAL CROSS-SECTIONS; RECOIL-ION; SCATTERING; PROTONS; HE;

D O I：

10.3390/atoms7020044

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Differential cross sections (DCS) for single electron capture from helium by heavy ion impact are calculated using a frozen core 3-body model and an active electron 4-body model within the first Born approximation. DCS are presented for H+, He2+, Li3+, and C6+ projectiles with velocities of 1 MeV/amu and 10 MeV/amu. In general, the DCS from the two models are found to differ by about one to two orders of magnitude with the active electron 4-body model showing better agreement with experiment. Comparison of the models reveals two possible sources of the magnitude difference: the inactive electron's change of state and the projectile-target Coulomb interaction used in the different models. Detailed analysis indicates that the uncaptured electron's change of state can safely be neglected in the frozen core approximation, but that care must be used in modeling the projectile-target interaction.

引用

页数：15

共 47 条

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