Physics – Plasma Physics
Scientific paper
Feb 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980phrva..21..525j&link_type=abstract
Physical Review A - General Physics, 3rd Series, vol. 21, Feb. 1980, p. 525-546. NASA-Navy-supported research.
Physics
Plasma Physics
53
Angular Momentum, Coronas, Electron Scattering, Electron Transitions, High Temperature Plasmas, Plasma Physics, Plasma Spectra, Astrophysics, Electron Capture, Electron Recombination, Line Spectra, Momentum Transfer, Plasma Density, Population Inversion, Radiative Transfer, X Ray Spectra
Scientific paper
A generalization of the low-density corona-model theory of the intensities of satellite lines of the resonance lines emitted by multiply charged helium-like ions in the X-ray spectra of high-temperature plasmas is developed in order to take account of electron collisional transitions between close autoionizing levels. A formalism for determining the population densities of the autoionizing levels and the satellite line intensities is presented, and the quantum mechanical calculation of autoionization, radiative decay and electron-induced collisional transitions is discussed. Generalized emission rate coefficients corresponding to dielectronic recombination and inner-shell-electron collisional excitation are tabulated as functions of electron density and temperature. The procedure is then used to illustrate the effects of angular-momentum-changing electron collisions on the intensities of the satellites of the 1s2p 1P to 1s2 1S resonance line of the ions Al XII and Si XIII. It is concluded that the collisional transitions have their most significant effect on the intensities of satellite transitions from metastable autoionizing states, which may be useful in determining plasma densities.
Blaha M.
Jacobs Verne L.
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