Ionization equilibrium of astrophysically abundant elements

Journal Article · Thu Dec 31 23:00:00 EST 1981 · Astrophys. J., Suppl. Ser.; (United States)

DOI:https://doi.org/10.1086/190769· OSTI ID:5648964

Shull, J M; Van Steenberg, M

We present new calculations of ionization equilibrium fractions of 11 abundant elements (C,N,O,Ne,Mg,Si,S,Ar,Ca,Fe,Ni) as functions of temperature. We also tabulate convenient coefficients for fitting the rates of collisional ionization, radiative recombination, and dielectronic recombination. Many of the ionization rates are based on recent experimental measurements of cross sections for collisional ionization and autoionization following inner-shell excitation. These rates are used elsewhere in computations of nonequilibrium ionization, radiative cooling, radiative shock models, and plasma emission diagnostics.

• Research Organization: Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, and Laboratory for Atmospheric and Space Physics
• OSTI ID: 5648964
• Journal Information: Astrophys. J., Suppl. Ser.; (United States), Journal Name: Astrophys. J., Suppl. Ser.; (United States) Vol. 48:1; ISSN APJSA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700103* -- Fusion Energy-- Plasma Research-- Kinetics
ALKALINE EARTH METALS
ARGON
AUTOIONIZATION
CALCIUM
CARBON
COLLISIONS
COOLING
ELEMENTS
FLUIDS
GASES
INNER-SHELL IONIZATION
IONIZATION
IONIZED GASES
IRON
MAGNESIUM
METALS
NEON
NICKEL
NITROGEN
NONMETALS
OXYGEN
PLASMA
RADIATIVE COOLING
RARE GASES
RECOMBINATION
SEMIMETALS
SILICON
SULFUR
TRANSITION ELEMENTS