Time-dependent and time-independent close-coupling methods for the electron-impact ionization of Be{sup +}

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.56.1994· OSTI ID:538507

Pindzola, M S; Robicheaux, F ^[1]; Badnell, N R ^[2]; Gorczyca, T W ^[3]

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1. Department of Physics, Auburn University, Auburn, Alabama 36849 (United States)
2. Department of Physics and Applied Physics, University of Strathclyde, Glasgow G40NG (United Kingdom)
3. Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008 (United States)

The electron-impact ionization cross section of Be{sup +} is calculated using both a time-dependent and a time-independent close-coupling method. The time-dependent method is based on the propagation of wave packets constructed using excited-state orbitals calculated in a core pseudopotential. The time-independent method is an R-matrix solution based on a total wave function constructed using antisymmetrized products of Laguerre pseudo-orbitals and zero-derivative box orbitals. In both methods, low partial-wave close-coupling results are added to high partial-wave distorted-wave results to yield ionization cross sections for Be{sup +} substantially below the experimental crossed-beam measurements of Falk and Dunn [Phys. Rev. A {bold 27}, 754 (1983)] and in agreement with the recent time-independent close-coupling calculations of Bartschat and Bray [J. Phys. B {bold 30}, L109 (1997)]. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 538507
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 3 Vol. 56; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BERYLLIUM IONS
CATIONS
COUPLING
ELECTRON-ION COLLISIONS
EXCITED STATES
IONIZATION
WAVE PACKETS