O III recombination coefficients (Kisielius+, 1999)

Physics – Atomic Physics

Scientific paper

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Atomic Physics, Planetary Nebulae

Scientific paper

We calculate effective recombination coefficients for the formation of the 5g-4f lines of O III in the intermediate coupling scheme. Photoionization data for the 5g levels calculated using the R-matrix method are used to derive their recombination coefficients. Cascading from higher states is included, allowing for the effects of finite electron density in a hydrogenic approximation. We explicitly include the distribution of population between the two ground levels of O3+ in the calculation of the line intensities. The results are presented as a simple programmable formula allowing the calculation of recombination line intensities for electron temperatures, Te in the range 5000-20000K and electron densities, Ne in the range 102-106cm-3. (5 data files).

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