Total electron-ion recombination of Fe III
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Date
1996-04
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Abstract
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 ab initio manner. Calculations are
carried out for the astrophysically important ion Fe III, and total and state-specific recombination rate coefficients
are obtained for e + Fe IV → Fe III, in the close coupling approximation employing the R-matrix method. The calculations correspond to a 49-state eigenfunction expansion for the Fe IV core that includes states from the ground configuration 3d^5 and the excited configurations 3d^4 4s and 3d^4 4p for proper treatment of the electron correlation effects. This is an accurate and detailed atomic calculation for the recombination
rates for Fe III. 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.
Description
Relevant data is available at: http://www.astronomy.ohio-state.edu/~nahar/nahar_radiativeatomicdata/index.html
Keywords
Fe III, R-matrix method, recombination rates
Citation
Nahar, Sultana Nurun. "Total electron-ion recombination of Fe III," Physical Review A, v. 53, no. 4, April, 1996.