Effects of angular-momentum-changing electron collisions and radiative corrections on dielectronic satellite spectra

Journal Article · Sun Dec 01 04:00:00 EST 1985 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.32.3382· OSTI ID:6521866

Jacobs, V L; Rogerson, J E; Chen, M H; Cowan, R D

The conventional low-density isolated-resonance theory for the intensities and widths of the 2l'2l''..-->..1s2l and the 1s2l'2l''..-->..1s/sup 2/2l dielectronic satellite lines has been generalized to take into account angular-momentum-changing electron collisions and the interaction between the atomic system and the quantized radiation field. The electron collisional transitions alter the population densities of the autoionizing levels, while the atom-field interaction modifies the relative probabilities for autoionization and radiative decay. The modifications to the conventional low-density expression for the satellite-line intensities may be interpreted as interference between the resonant and nonresonant electron continua together with radiative corrections. These modifications have been expressed in terms of the unperturbed decay rates, the photoionization cross sections, and the Fano line-profile parameters. Using the transition probabilities obtained from two different relativistic atomic structure codes, the K-shell satellite-line intensities and widths have been calculated for argon as functions of temperature and density, taking into account both dielectronic recombination and inner-shell-electron collisional excitation.

• Research Organization: E.O. Hulburt Center for Space Research (Code 4170), Naval Research Laboratory, Washington, DC 20375
• OSTI ID: 6521866
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 32:6; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
AUTOIONIZATION
COLLISIONS
CORRECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
FUNCTIONS
GASES
IONIZATION
K SHELL
MANY-BODY PROBLEM
NONMETALS
PLASMA
RADIATIVE CORRECTIONS
RADIATIVE DECAY
RARE GASES
RECOMBINATION
SPECTRA
SPECTRAL DENSITY
SPECTRAL FUNCTIONS
TWO-BODY PROBLEM
X-RAY SPECTRA