Scaling of dielectronic-recombination data in fluorinelike ions

Dasgupta, A.; Whitney, K. G.

doi:10.1103/physreva.42.2640

Cited by 18 publications

(27 citation statements)

References 29 publications

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“…At larger temperatures, there is large disagreement with the results from the simplified-model calculations of Jacobs et al (1977). Closer agreement for larger temperatures is seen with the results of Roszman (1987) and Dasgupta & Whitney (1990). Our results are in excellent agreement with the Fig.…”

Section: Resultssupporting

confidence: 80%

“…The single-configuration, LS-coupling calculations by Roszman (1987) overestimate the DR rate coefficient by a factor of ≈1.6 for temperatures above ≈30 eV. The single-configuration, intermediate-coupling results of Dasgupta & Whitney (1990) agree very well with the experimental results in the high temperature region. The recent MCDF results of Savin et al (1997Savin et al ( , 1999 agree with the experimental data as well as our MCBP results.…”

Section: Resultssupporting

confidence: 78%

“…For lowcharged ions they used the results from the simplified model calculations of Jacobs et al (1977Jacobs et al ( , 1979 as fitted by Shull & Van Steenberg (1982); and for atoms from Ar to Ni they adopted the fitting formula of Dasgupta & Whitney (1990). As shown below, this compilation of Mazzota et al (1998) contains DR rate coefficients which differ by as much as a factor of 2 from the most recent theoretical and experimental data for fluorine-like ions.…”

Section: +mentioning

confidence: 99%

“…Comparison with previous results of Roszman (1987) shows large discrepancies which were attributed to the numerical errors in the Roszman data. Note that the calculations of Jacobs et al (1977Jacobs et al ( , 1979Jacobs et al ( , 1980, Jacobs (1985), Roszman (1987), Dasgupta &Whitney (1990), andChen (1988) all neglected the contributions from the fine-structure 2p 3/2 -2p 1/2 excitation of the recombining ions.…”

Section: +mentioning

confidence: 99%

“…by Dasgupta & Whitney (1990). Three-and four-parameter fits were then made to these data and it was suggested that these fitting formulae would enable one to obtain DR rate coefficients for all elements in the fourth row of the periodic table by a combination of interpolation and extrapolation.…”

Section: +mentioning

confidence: 99%

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Dielectronic recombination data for dynamic finite-density plasmas

Zatsarinny

Gorczyca

et al. 2006

A&A

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Partial and total dielectronic recombination (DR) rate coefficients for fluorine-like ions forming neon-like systems have been calculated as part of the assembly of a final-state level-resolved DR database necessary for the modelling of dynamic finite-density plasmas (Badnell et al. 2003). Calculations have been performed for DR of both ground and metastable initial states for Ne + to Zn 21+ , as well as for Kr 27+ , Mo 33+ , and Xe 45+ . Results for a selection of ions are presented and discussed. We find that low-temperature DR, via 2 → 2 core excitations involving no change in the principal quantum number of the core electron, does not scale smoothly with nuclear charge Z due to resonances straddling the ionization limit of the recombined system, thereby making explicit calculations for each ion necessary. Most of the earlier calculations neglected contributions from the fine-structure 2p 3/2 − 2p 1/2 excitation which has been shown to be very important for low-temperature DR coefficients. The DR data are suitable for modelling of solar and cosmic plasmas under conditions of collisional ionization equilibrium, photoionization equilibrium, and non-equilibrium ionization.

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Section: Resultssupporting

confidence: 80%