Abstract
X-ray spectra of laser-produced highly charged gold-ion plasma have been studied theoretically. Energies and oscillator strengths for 3d-4f transitions are calculated in detail for nickel, copper, zinc, or galliumlike ions with a couple of spectator electrons. Based on a precise nonempirical multiconfiguration Dirac-Fock calculation, a model that could be called the noninteracting spectator-electron model (NISEM) is proposed to analyze x-ray radiation from plasmas. The NISEM extrapolates the satellite emission spectra of ions with a single spectator electron to those ions with an arbitrary number of spectator electrons. In the framework of NISEM and local thermodynamic equilibrium, the experimental spectra have been reproduced reasonably well by the present theory.
Published Version
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