Ab initio calculation of the non-relativistic free-free Gaunt factor incorporating plasma screening

G. S J Armstrong*, J. Colgan, D. P. Kilcrease, N. H. Magee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We present calculations of Gaunt factors for free-free absorption over a wide range of temperatures and densities. The calculations employ a partial wave expansion approach, which is able to account for plasma screening within the calculation of the free-free Gaunt factor. Much of the existing Gaunt factor data pertains to hydrogenic systems, and plasma screening is often incorporated in opacity calculations using approximate methods. The use of a more accurate method allows us to determine the accuracy of such approximations in calculations of the free-free monochromatic and mean opacities.

Original languageEnglish
Pages (from-to)61-69
Number of pages9
JournalHigh Energy Density Physics
Volume10
DOIs
Publication statusPublished - Mar 2014

Keywords

  • Gaunt factor
  • Inverse-bremsstrahlung
  • Opacities

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Radiation

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