Relativistic distorted-wave procedures with pseudostates

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.77.022701· OSTI ID:21140484

Guoxin, Chen ^[1]

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1. ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 (United States)

The relativistic distorted-wave (RDW) procedures developed by Chen [Phys. Rev. A 53, 3227 (1996)] have been extended to include pseudostates. The RDW procedures with pseudostates are applied to the calculation of electron impact excitation (EIE) of Fe XVII. Pseudostates are shown to have a significant effect on the cross sections for important transitions such as 3C ({lambda}=15.015 A) and 3D ({lambda}=15.262 A) of Fe XVII. The convergence of the RDW calculations has been carefully investigated. The present RDW calculations of Fe XVII are further compared with our previous close coupling results using the fully relativistic Dirac R-matrix (DRM) method, where resonance and more complete channel coupling effects were included in addition to the background direct excitations. The present RDW calculations are in good agreement to the background cross sections from the DRM calculations. This agreement indicates the mutual confirmation of the validity of both the RDW and the DRM calculations of the direct or background EIE cross sections.

• OSTI ID: 21140484
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 77; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CONVERGENCE
CORRECTIONS
COUPLING
CROSS SECTIONS
DIRAC APPROXIMATION
DISTORTED WAVE THEORY
ELECTRON COLLISIONS
ELECTRONS
EXCITATION
R MATRIX
RELATIVISTIC RANGE
RESONANCE