Low Temperature Dielectronic Recombination Coefficients for Ions of C, N and O

Nussbaumer, H.; Storey, P. J.

doi:10.1007/978-94-009-7094-6_66

Cited by 3 publications

(10 citation statements)

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“…The computer program superstructure was originally developed by Eissner et al (1974), and the version used in the present work contains improvements by Nussbaumer & Storey (1978). A summary of the code's main features is given by Eissner (1991).…”

Section: Methodsmentioning

confidence: 99%

“…where the basis functions φ i are constructed from oneelectron orbitals generated in two types of potential V (λ nl ): spectroscopic orbitals P (nl) are calculated in a statistical Thomas-Fermi-Dirac model potential (Eissner & Nussbaumer 1969) whereas correlation orbitals P (nl) are obtained in a Coulomb potential (Nussbaumer & Storey 1978). The scaling parameters λ nl are computed variationally so as to minimize the weighted sum of the non-relativistic energies of the terms of the ground configuration…”

Section: Methodsmentioning

confidence: 99%

“…The forbidden transitions in C-like ions were previously considered by Garstang (1968), Nicolaides et al (1971), Nussbaumer (1971), Kastner et al (1977), Mason & Bhatia (1978), Nussbaumer & Rusca (NR, 1979), Cheng et al (1979), Baluja & Doyle (1981), and more recently by Froese Fischer & Saha (FS1, 1985) and Hibbert et al (1993). For ions in the oxygen sequence, computations have been reported by Garstang (1968), Nicolaides et al (1971), Kastner et al (1977), Cheng et al (1979), Bhatia et al (1979), Froese Fischer & Saha (FS2, 1983), Baluja & Zeippen (BZ, 1988) and Gaigalas et al (1994).…”

Section: Introductionmentioning

confidence: 92%

“…Pres: present results. NR: Nussbaumer & Rusca (1979 also give results for the forbidden transitions in the ground configuration. Concerning the large 1 D 2 − 1 S 0 E2 transition probability, there is excellent agreement between the civ3, FS1c and present A-value.…”

Section: The Carbon Isoelectronic Sequencementioning

confidence: 99%

“…with accuracy ratings of 10% or better) to be incorporated in the IP databases. We make use of the computer program superstructure (Eissner et al 1974;Nussbaumer & Storey 1978;Eissner 1991), which allows for configuration interaction (CI) and Breit-Pauli (BP) relativistic effects. This code has been extensively applied in the computation of atomic spectra.…”

Section: Introductionmentioning

confidence: 99%

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Atomic data from the IRON Project

Galavís

Mendoza

Zeippen

1997

Astron. Astrophys. Suppl. Ser.

202

144

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Abstract. As part of the IRON Project, radiative rates have been calculated for the forbidden transitions within the ground configuration of atoms and ions in the carbon (2s 2 2p 2 ) and oxygen (2s 2 2p 4 ) isoelectronic sequences for Z ≤ 28. The atomic structure code superstructure was used, which allows for configuration interaction, relativistic effects and semi-empirical term energy corrections. Comparisons are made with previous theoretical datasets for the same sequences. It is shown once again that, to obtain reliable transition probabilities, in particular those of the electric quadrupole type, it is essential to use accurate and consistent experimental transition wavelengths. For the C and O sequences such data are fortunately available from the work of Edlén (1983Edlén ( , 1985. The general accuracy of the present probabilities is rated to be within 10%, with the exception of some electric quadrupole transitions in low-Z ions whose radiative rates are small with an accuracy not better than ±50%.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: The Carbon Isoelectronic Sequencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Atomic data from the IRON Project

Galavís

Mendoza

Zeippen

1997

Astron. Astrophys. Suppl. Ser.

202

144

View full text Add to dashboard Cite

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Photoionization and Electron–Ion Recombination in Astrophysical Plasmas

Hillier

2023

Atoms

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Photoionization and its inverse, electron–ion recombination, are key processes that influence many astrophysical plasmas (and gasses), and the diagnostics that we use to analyze the plasmas. In this review we provide a brief overview of the importance of photoionization and recombination in astrophysics. We highlight how the data needed for spectral analyses, and the required accuracy, varies considerably in different astrophysical environments. We then discuss photoionization processes, highlighting resonances in their cross-sections. Next we discuss radiative recombination, and low and high temperature dielectronic recombination. The possible suppression of low temperature dielectronic recombination (LTDR) and high temperature dielectronic recombination (HTDR) due to the radiation field and high densities is discussed. Finally we discuss a few astrophysical examples to highlight photoionization and recombination processes.

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Photoionization and electron-ion recombination in astrophysical plasmas

Hillier¹

2023

Preprint

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Photoionization and its inverse, electron-ion recombination, are key processes that influence many astrophysical plasmas (and gasses), and the diagnostics that we use to analyse the plasmas. In this review we provide a brief overview of the importance of photoionization and recombination in astrophysics. We highlight how the data needed for spectral analyses, and the required accuracy, varies considerably in different astrophysical environments. We then discuss photoionization processes, highlighting resonances in their cross-sections. Next we discuss radiative recombination, and low and high temperature dielectronic recombination. The possible suppression of low temperature dielectronic recombination (LTDR) and high temperature dielectronic recombination (HTDR) due to the radiation field and high densities is discussed. Finally we discuss a few astrophysical examples to highlight photoionization and recombination processes.

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Low Temperature Dielectronic Recombination Coefficients for Ions of C, N and O

Cited by 3 publications

References 0 publications

Atomic data from the IRON Project

Atomic data from the IRON Project

Photoionization and Electron–Ion Recombination in Astrophysical Plasmas

Photoionization and electron-ion recombination in astrophysical plasmas

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