Comparisons between perturbative and radiation-damped {ital R}-matrix approaches to dielectronic recombination: Application to Ar{sup 15+}
- Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008-5151 (United States)
- Department of Physics, Auburn University, Auburn, Alabama 36849-5311 (United States)
- Department of Physics and Applied Physics, University of Strathclyde, Glasgow G40NG (United Kingdom)
We apply a recently formulated close-coupling technique [Robicheaux {ital et} {ital al}., Phys. Rev. A {bold 52}, 1319 (1995)], which includes radiation damping via an optical potential, to the calculation of dielectronic recombination cross sections of Ar{sup 15+}. Specifically, we compare the results from both Wigner-Eisenbud and eigenchannel {ital R}-matrix calculations to perturbative methods. For this system, no evidence for interfering resonance phenomena is found, and excellent agreement is obtained among all methods. This indicates that the present close-coupling treatment of the dielectronic recombination is highly accurate and can therefore be used to investigate systems where lower-order perturbative methods are inappropriate, such as where interference effects between neighboring resonances and between direct and resonant recombination processes are expected. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 383139
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 3 Vol. 54; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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