Dielectronic recombination, photoionization and opacities

N. R. Badnell, M.J. Seaton, Hugh Summers

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

We review methodologies for describing dielectronic recombination (DR). We look briefly at the state-of-play of theory vs experiment. We then discuss how to deliver DR data in a form suitable for modelling and we review the status of the partial and total DR database being assembled for the modelling of dynamic finite-density plasmas. We comment on the role of fields and how modelling l-changing collisions approximately models the dynamic part of the plasma microfield.
We also consider the inverse process of photoionization and discuss how the same approach to DR is being used for inner-shell photoionization and the determination of opacities in stellar interiors. In particular, we pay attention to the role of opacity in connection with the discrepancy between the helioseismology observations and stellar evolution models for the position of the base of the solar convective zone.
LanguageEnglish
Title of host publicationX-Ray diagnostics of astrophysical plasmas
Subtitle of host publicationtheory, experiment and observation
EditorsRandall K. Smith
Place of PublicationMelville
Pages305-314
Number of pages9
DOIs
Publication statusPublished - 12 Jul 2005
EventAnnual Scientific Session on High-Temperature Superconductivity - Moscow, Russian Federation
Duration: 19 Dec 200119 Dec 2001

Publication series

NameAIP conference proceedings
PublisherAmerican Institute of Physics
Volume774
ISSN (Print)0094-243X

Conference

ConferenceAnnual Scientific Session on High-Temperature Superconductivity
CountryRussian Federation
CityMoscow
Period19/12/0119/12/01

Fingerprint

opacity
photoionization
stellar interiors
helioseismology
stellar evolution
plasma density
methodology
collisions

Keywords

  • atomic data
  • interiors
  • stars
  • atomic processes
  • finite-density plasmas
  • opal
  • fields
  • spectra
  • electron
  • transitions
  • temperature
  • emission
  • solar corona
  • isoelectronic sequence

Cite this

Badnell, N. R., Seaton, M. J., & Summers, H. (2005). Dielectronic recombination, photoionization and opacities. In R. K. Smith (Ed.), X-Ray diagnostics of astrophysical plasmas: theory, experiment and observation (pp. 305-314). (AIP conference proceedings; Vol. 774). Melville. https://doi.org/10.1063/1.1960943
Badnell, N. R. ; Seaton, M.J. ; Summers, Hugh. / Dielectronic recombination, photoionization and opacities. X-Ray diagnostics of astrophysical plasmas: theory, experiment and observation . editor / Randall K. Smith. Melville, 2005. pp. 305-314 (AIP conference proceedings).
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Badnell, NR, Seaton, MJ & Summers, H 2005, Dielectronic recombination, photoionization and opacities. in RK Smith (ed.), X-Ray diagnostics of astrophysical plasmas: theory, experiment and observation . AIP conference proceedings, vol. 774, Melville, pp. 305-314, Annual Scientific Session on High-Temperature Superconductivity , Moscow, Russian Federation, 19/12/01. https://doi.org/10.1063/1.1960943

Dielectronic recombination, photoionization and opacities. / Badnell, N. R.; Seaton, M.J.; Summers, Hugh.

X-Ray diagnostics of astrophysical plasmas: theory, experiment and observation . ed. / Randall K. Smith. Melville, 2005. p. 305-314 (AIP conference proceedings; Vol. 774).

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

TY - GEN

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AB - We review methodologies for describing dielectronic recombination (DR). We look briefly at the state-of-play of theory vs experiment. We then discuss how to deliver DR data in a form suitable for modelling and we review the status of the partial and total DR database being assembled for the modelling of dynamic finite-density plasmas. We comment on the role of fields and how modelling l-changing collisions approximately models the dynamic part of the plasma microfield. We also consider the inverse process of photoionization and discuss how the same approach to DR is being used for inner-shell photoionization and the determination of opacities in stellar interiors. In particular, we pay attention to the role of opacity in connection with the discrepancy between the helioseismology observations and stellar evolution models for the position of the base of the solar convective zone.

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KW - transitions

KW - temperature

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Badnell NR, Seaton MJ, Summers H. Dielectronic recombination, photoionization and opacities. In Smith RK, editor, X-Ray diagnostics of astrophysical plasmas: theory, experiment and observation . Melville. 2005. p. 305-314. (AIP conference proceedings). https://doi.org/10.1063/1.1960943