Dielectronic recombination data for dynamic finite-density plasmas

Abstract

Abstract. Dielectronic recombination data for nitrogen-like ions forming oxygen-like ions has been calculated as part of the assembly of a level-resolved dielectronic recombination database necessary for the modelling of dynamic finite-density plasmas . Dielectronic recombination rate coefficients for a selection of ions from O + to Xe 47+ are presented and the results discussed.

CHIANTI – an atomic database for emission lines

“…Rate coefficients for ground state dielectronic recombination are taken from Badnell (2006a) for hydrogen-like ions, from Bautista & Badnell (2007) for helium-like ions, from Colgan et al (2004) for lithiumlike ions, from Colgan et al (2003) for the beryllium-like ions, Altun et al (2005) for the boron-like ions, from Zatsarinny et al (2005b) for carbon-like ions, Mitnik & Badnell (2004) for nitrogen-like ions, Zatsarinny et al (2005a) for oxygen-like ions, Zatsarinny et al (2006) for fluorine-like ions, Zatsarinny et al (2004) for neon-like ions, Altun et al (2006) for sodium-like ions, and Altun et al (2007) for magnesium-like ions. This set of calculations provide a coherent set of dielectronic recombination rates and we have adopted them as a standard by which to assess the validity of other calculations.…”

Dielectronic recombination data for dynamic finite-density plasmas

“…This Paper XI completes our work on DR for the H-like through Ne-like isoelectronic sequences. Recent papers are on the N-like (Mitnik & Badnell 2004), Ne-like (Zatsarinny et al 2004) and He-like (Bautista & Badnell 2005) sequences and they contain references to papers on earlier sequences in the series. Work is already under way on the M-shell -see Altun et al (2006a,b) for the recently completed Na-like and Mg-like isoelectronic sequences.…”

Atomic data for x-ray astrophysics

“…These include calculations for the various isoelectronic sequences H-Na (Altun et al, 2004(Altun et al, , 2005(Altun et al, , 2006Badnell, 2006;Colgan et al, 2003Colgan et al, , 2004Colgan et al, , 2005Mitnik and Badnell, 2004;Zatsarinny et al, 2003Zatsarinny et al, , 2004aZatsarinny et al, ,b, 2005aZatsarinny et al, ,b, 2006. In a complementary effort Gu (2003b) has used fac to calculate total DR rate coefficients for the H-like through Ne-like isoelectronic sequences for the 7 elements Mg, Si, S, Ar, Ca, Fe and Ni.…”

“…Recent experimental measurements using storage rings (Savin, 2000;Savin et al, 2002b) and calculations using autostructure (Altun et al, 2004(Altun et al, , 2005(Altun et al, , 2006Badnell, 2006;Colgan et al, 2003Colgan et al, , 2004Colgan et al, , 2005Mitnik and Badnell, 2004;Zatsarinny et al, 2003Zatsarinny et al, , 2004aZatsarinny et al, ,b, 2005aZatsarinny et al, ,b, 2006 of DR include intermediate coupling structure calculations, and so are likely to be more accurate for low temperature DR than previous calculations. Nonetheless, as pointed out by Schippers et al (2004) and by Gu (2003b), DR at low temperatures continues to be a major source of uncertainty in calculations of ionization balance under photoionization conditions.…”