BLUE SATELLITE STRUCTURE NEAR HE-ALPHA AND HE-BETA AND REDISTRIBUTIONOF LEVEL POPULATIONS

For a wide class of ions a mechanism for the emission of blue satellit es close to the He-like resonance line in dense plasmas is proposed. I t is based on the collisional transfer of population between autoionis ing levels. Detailed collisional radiative calculations involving all J-split autoionising levels are carried out for Al and may serve as a benchmark. A general consideration of redistribution effects inside th e autoionising levels discovered diagnostically attractive density eff ects for laser-produced plasmas for both the He-alpha and He-beta sate llite structure. (C) 1998 Elsevier Science B.V.