Fully relativistic time-dependent close-coupling method for electron-impact ionization of atomic ions

被引：4

作者：

Pindzola, M. S. ^{[1
]}

Ludlow, J. A. ^{[1
]}

Robicheaux, F. ^{[1
]}

Colgan, J. ^{[2
]}

Fontes, C. J. ^{[2
]}

机构：

[1] Auburn Univ, Dept Phys, Auburn, AL 36849 USA

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW A | 2009年 / 80卷 / 05期

关键词：

atom-electron collisions; Dirac equation; eigenvalues and eigenfunctions; electron impact ionisation; neon; positive ions; spin-orbit interactions; wave functions;

D O I：

10.1103/PhysRevA.80.052706

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A fully relativistic time-dependent close-coupling method is developed based on Dirac's covariant formulation of quantum mechanics. The expansion of a one-electron wave function in spin-orbit eigenfunctions yields the well-known coupled Dirac equations in two radial wave functions, while the expansion of a two-electron wave function in coupled spin-orbit eigenfunctions yields close-coupled Dirac equations in four radial wave functions. The time-dependent Dirac equations are solved directly using numerical methods that avoid the Fermi doubling pathology. Test calculations are carried out using the one-electron coupled equations for j=1/2 elastic potential scattering from Ne9+ at 2.00 keV and using the two-electron close-coupled equations for J=0,1 ionization of Ne9+ at 4.15 keV.

引用

页数：6

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