Electron-ion recombination of FeII

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.55.1980· OSTI ID:467350

Nahar, S N ^[1]

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

A complete treatment of electron-ion recombination of e+FeIII{r_arrow}FeII employing a unified method is presented. The treatment incorporates both the radiative and dielectronic recombinations in a self-consistent manner. Total recombination rate coefficients are obtained from photoionization cross sections, and from collision strengths for dielectronic recombination calculated using the precise theory of Bell and Seaton [J. Phys. B {bold 18}, 1589 (1985)]. Large-scale computations for both of these quantities are carried out in the close coupling approximation using the R-matrix method with an eigenfunction expansion that includes 83 states of FeIII dominated by the ground 3d{sup 6}, and the excited 3d{sup 5}4s and 3d{sup 5}4p configurations. Both the total and state-specific recombination rate coefficients are obtained. Comparison of the present results with the previous ones shows considerable difference for most of the temperature regions. The present results provide accurate and self-consistent recombination rates, in the temperature range of practical applications (T{lt}10{sup 5} K), for ionization balance in photoionization models employing the detailed photoionization cross sections from the Opacity Project. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 467350
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 3 Vol. 55; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CATIONS
COUPLING
CROSS SECTIONS
D STATES
ELECTRON CAPTURE
ELECTRON-ION COLLISIONS
IONIZATION
IRON IONS
OPACITY
PHOTOIONIZATION
R MATRIX
RECOMBINATION