Relativistic-configuration-interaction calculations ofKα satellite properties for aluminum plasmas created by intense proton beams

Configuration-interaction calculations with Breit-Pauli relativistic corrections have been carried out for aluminum ions for the purpose of studying K{α} satellite spectra obtained during intense proton-beam--plasma interaction experiments. We present results for calculated wavelengths, oscillator strengths, and fluorescence yields of K{α} satellites for Al i--Al xi . Detailed calculations have been performed both for transitions involving levels of ground-state configurations and for transitions involving levels of low-lying excited configurations with M-shell spectator electrons. Calculated wavelengths for the K{α} transitions are compared with a spectrum obtained during a Particle Beam Fusion Accelerator II proton-beam experiment [Lasers Part. Beams 8, 555 (1990)] at Sandia National Laboratories. Our calculations show that the K{α} satellite lines of aluminum ions can be classified into two distinct groups: one involving transitions of type 1s¹2sʳ2pq{→}1s²2sʳ2p^q-1, the other 1s¹2sʳ2p^q-13l{→}1s²2sʳ2p^q-23l. The former consists of the resonance K{α} transitions, which gives the characteristic satellite-line position of an ion, while the latter overlaps with the resonance K{α} lines of the next-higher ionization stage. We find that both correlation effects and relativistic corrections significantly impact the calculated K{α} transition energies.