Computer Science
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jqsrt..58..645j&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 58, issue 4-6, pp. 645-659
Computer Science
3
X-Ray Lines: Iron, X-Ray Lines: Plasma, X-Ray Lines: Computer Simulations, Iron Lines: Plasma
Scientific paper
A detailed spectral model has been under development for the computer simulation of 2p→1s Kα X-ray emissions from highly-charged Fe ions in plasmas. Particular interest has been directed at the Kα emissions produced by the ions from Fe XVIII to Fe XXIV, which occur in the spectral range from 1.84 to 1.94 Å. Account has been taken of the fundamental radiative emission processes associated with radiationless electron capture or dielectronic recombination, inner-shell-electron collisional excitation, and inner-shell-electron collisional ionization. In high-temperature plasmas, small or moderate departures from steady-state corona-model charge-state distributions may occur due to the effects of ion transport processes. However, the assumption of equilibrium (Maxwellian) electron energy distributions is usually accepted to be valid. Particular emphasis has now been directed at the identification of spectral features that can serve as diagnostics of extreme non-equilibrium or transient-ionization conditions, which can occur in both low-density and high-density plasmas as well as in electron-ion beam interactions.
Beiersdorfer Peter
Decaux V.
Jacobs Verne L.
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