Electron-ion recombination of Be-like C, N, and O

M. Fogle, N.R. Badnell, P. Glans, S.D. Loch, S. Madzunkov, S.A. Abdel-Naby, M.S. Pindzola, R. Schuch

Research output: Contribution to journalArticle

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Abstract

The absolute total recombination reaction rate coefficients for Be-like C, N, and O have been measured using the CRYRING storage ring and compared with the results from distorted-wave theory. For the theory results, it is found that shifts to NIST energy values for the core excited energies of the recombining system are not sufficient to accurately match all of the resonance positions and heights at lower energies. These theory results represent the quality of most archived theory DR data. The accurate calculation of these low energy resonances still presents a significant challenge to theory. In addition, trielectronic recombination resonances, associated with the formation of triply excited states during recombination, have been observed in the total recombination reaction rate coefficient spectra of N3+ and O4+. Finally, we construct a dielectronic recombination Maxwellian rate coefficient from the experimental results for low n resonances, and from the theoretical results for high n resonances. In the case of O4+, the trielectronic recombination resonances have a strong influence on the low temperature Maxwellian rate coefficient. Our best hybrid Maxwellian rate coefficient is compared with archived distorted-wave theory data, and is found to be in reasonable agreement, even at the low temperatures.

Original languageEnglish
Pages (from-to)757-766
Number of pages10
JournalExperimental Astronomy
Volume442
Issue number2
DOIs
Publication statusPublished - Nov 2005

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electron-ion recombination
recombination
electron
ion
coefficients
recombination reactions
reaction rate
energy
reaction kinetics
shift
excitation
rate

Keywords

  • atomic
  • molecular and nuclear data
  • finite density plasmas
  • dielectronic recombination
  • isoelectronic sequence
  • radiative recombination
  • low temperatures
  • coefficients
  • carbon
  • argon

Cite this

Fogle, M., Badnell, N. R., Glans, P., Loch, S. D., Madzunkov, S., Abdel-Naby, S. A., ... Schuch, R. (2005). Electron-ion recombination of Be-like C, N, and O. Experimental Astronomy, 442(2), 757-766. https://doi.org/10.1051/0004-6361:20040559
Fogle, M. ; Badnell, N.R. ; Glans, P. ; Loch, S.D. ; Madzunkov, S. ; Abdel-Naby, S.A. ; Pindzola, M.S. ; Schuch, R. / Electron-ion recombination of Be-like C, N, and O. In: Experimental Astronomy. 2005 ; Vol. 442, No. 2. pp. 757-766.
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abstract = "The absolute total recombination reaction rate coefficients for Be-like C, N, and O have been measured using the CRYRING storage ring and compared with the results from distorted-wave theory. For the theory results, it is found that shifts to NIST energy values for the core excited energies of the recombining system are not sufficient to accurately match all of the resonance positions and heights at lower energies. These theory results represent the quality of most archived theory DR data. The accurate calculation of these low energy resonances still presents a significant challenge to theory. In addition, trielectronic recombination resonances, associated with the formation of triply excited states during recombination, have been observed in the total recombination reaction rate coefficient spectra of N3+ and O4+. Finally, we construct a dielectronic recombination Maxwellian rate coefficient from the experimental results for low n resonances, and from the theoretical results for high n resonances. In the case of O4+, the trielectronic recombination resonances have a strong influence on the low temperature Maxwellian rate coefficient. Our best hybrid Maxwellian rate coefficient is compared with archived distorted-wave theory data, and is found to be in reasonable agreement, even at the low temperatures.",
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Fogle, M, Badnell, NR, Glans, P, Loch, SD, Madzunkov, S, Abdel-Naby, SA, Pindzola, MS & Schuch, R 2005, 'Electron-ion recombination of Be-like C, N, and O', Experimental Astronomy, vol. 442, no. 2, pp. 757-766. https://doi.org/10.1051/0004-6361:20040559

Electron-ion recombination of Be-like C, N, and O. / Fogle, M.; Badnell, N.R. ; Glans, P.; Loch, S.D. ; Madzunkov, S.; Abdel-Naby, S.A. ; Pindzola, M.S. ; Schuch, R.

In: Experimental Astronomy, Vol. 442, No. 2, 11.2005, p. 757-766.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electron-ion recombination of Be-like C, N, and O

AU - Fogle, M.

AU - Badnell, N.R.

AU - Glans, P.

AU - Loch, S.D.

AU - Madzunkov, S.

AU - Abdel-Naby, S.A.

AU - Pindzola, M.S.

AU - Schuch, R.

PY - 2005/11

Y1 - 2005/11

N2 - The absolute total recombination reaction rate coefficients for Be-like C, N, and O have been measured using the CRYRING storage ring and compared with the results from distorted-wave theory. For the theory results, it is found that shifts to NIST energy values for the core excited energies of the recombining system are not sufficient to accurately match all of the resonance positions and heights at lower energies. These theory results represent the quality of most archived theory DR data. The accurate calculation of these low energy resonances still presents a significant challenge to theory. In addition, trielectronic recombination resonances, associated with the formation of triply excited states during recombination, have been observed in the total recombination reaction rate coefficient spectra of N3+ and O4+. Finally, we construct a dielectronic recombination Maxwellian rate coefficient from the experimental results for low n resonances, and from the theoretical results for high n resonances. In the case of O4+, the trielectronic recombination resonances have a strong influence on the low temperature Maxwellian rate coefficient. Our best hybrid Maxwellian rate coefficient is compared with archived distorted-wave theory data, and is found to be in reasonable agreement, even at the low temperatures.

AB - The absolute total recombination reaction rate coefficients for Be-like C, N, and O have been measured using the CRYRING storage ring and compared with the results from distorted-wave theory. For the theory results, it is found that shifts to NIST energy values for the core excited energies of the recombining system are not sufficient to accurately match all of the resonance positions and heights at lower energies. These theory results represent the quality of most archived theory DR data. The accurate calculation of these low energy resonances still presents a significant challenge to theory. In addition, trielectronic recombination resonances, associated with the formation of triply excited states during recombination, have been observed in the total recombination reaction rate coefficient spectra of N3+ and O4+. Finally, we construct a dielectronic recombination Maxwellian rate coefficient from the experimental results for low n resonances, and from the theoretical results for high n resonances. In the case of O4+, the trielectronic recombination resonances have a strong influence on the low temperature Maxwellian rate coefficient. Our best hybrid Maxwellian rate coefficient is compared with archived distorted-wave theory data, and is found to be in reasonable agreement, even at the low temperatures.

KW - atomic

KW - molecular and nuclear data

KW - finite density plasmas

KW - dielectronic recombination

KW - isoelectronic sequence

KW - radiative recombination

KW - low temperatures

KW - coefficients

KW - carbon

KW - argon

U2 - 10.1051/0004-6361:20040559

DO - 10.1051/0004-6361:20040559

M3 - Article

VL - 442

SP - 757

EP - 766

JO - Experimental Astronomy

JF - Experimental Astronomy

SN - 0922-6435

IS - 2

ER -

Fogle M, Badnell NR, Glans P, Loch SD, Madzunkov S, Abdel-Naby SA et al. Electron-ion recombination of Be-like C, N, and O. Experimental Astronomy. 2005 Nov;442(2):757-766. https://doi.org/10.1051/0004-6361:20040559