Total electron-ion recombination of FeIII

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.53.2417· OSTI ID:279925

Nahar, S N ^[1]

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1. Department of Astronomy, The Ohio State University, Columbus, Ohio 43210 (United States)

It is shown that a method for calculating unified total electron-ion recombination rates, incorporating both the radiative and dielectronic recombination processes, can be applied to substantially complex atomic systems where a large number of recombination channels need to be coupled in an {ital ab} {ital initio} manner. Calculations are carried out for the astrophysically important ion FeIII, and total and state-specific recombination rate coefficients are obtained for {ital e}+ FeIV {r_arrow} FeIII, in the close coupling approximation employing the {ital R}-matrix method. The calculations correspond to a 49-state eigenfunction expansion for the FeIV core that includes states from the ground configuration 3{ital d}{sup 5} and the excited configurations 3{ital d}{sup 4}4{ital s} and 3{ital d}{sup 4}4{ital p} for proper treatment of the electron correlation effects. This is an accurate and detailed atomic calculation for the recombination rates for FeIII. The present rates are up to an order of magnitude lower than the previous values obtained through the Burgess general formula at electron temperatures where dielectronic recombination dominates. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 279925
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 53; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
AB INITIO CALCULATIONS
CLOSE COUPLING APPROXIMATION
CORRELATIONS
EIGENFUNCTIONS
ELECTRON-ION COLLISIONS
EXCITATION
EXCITED STATES
GROUND STATES
IRON IONS
ONE-DIMENSIONAL CALCULATIONS
RECOMBINATION