Iron ionization and recombination rates and ionization equilibrium

Details Iron ionization and recombination rates and ionization equilibrium Iron ionization and recombination rates and ionization equilibrium

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...398..394a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 398, no. 1, p. 394-406.

Statistics

Computation

560

Ionization Cross Sections, Iron, Metal Ions, Recombination Reactions, Abundance, Electron Impact, Interstellar Chemistry

Scientific paper

In the past few years important progress has been made on the knowledge of ionization and recombination rates of iron, an astrophysically abundant heavy element and a major impurity in laboratory fusion devices. We make a critical review of the existing data on ionization and dielectronic recombination and present new computations of radiative recombination rate coefficients of Fe(+14) through Fe(+25) using the photoionization cross sections of Clark et al. (1986). We provide analytical fits to the recommended data (direct ionization and excitation-autoionization cross sections; radiative and dielectronic recombination rate coefficients). Finally we determine the iron ionic fractions at ionization equilibrium and compare them with previous computations as well as with observational data.

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