SATELLITES AND RESONANT SATELLITES IN THE PHOTOIONIZATION OF ATOMIC CU

Many-body perturbation theory has been used to calculate photoionizati on cross sections with excitations (3d(10)4s-->3d(9)5skl, 3d(9)4pkl, 3 d(8)4s(2)kl, 3d(8)4s5skl, and 3d(8)4s4dkl) of atomic copper from the s ingle-ionization threshold 7.7-120.0 eV. Resonance structures due to b oth one-electron excitations (3p-->nl and 3d-->nl) and two-electron ex citations (3d(10)4s-->3d(9)5snl and 3d(9)4pnl) are included. The large nonresonant photoionizations (satellites) leaving the ion in 3d(9)5s and 3d(9)4p final states are found. The resonant satellites in the reg ion of the 3p threshold are the enhanced resonances in the Cu+ 3d(8)4s (2) via a super-Coster-Kronig (SCK) transition, and the resonant satel lites between 80 and 90 eV in the experiment are the enhanced resonanc es in the Cu+ 3d(8)4s5s and 3d(8)4s4d due to SCK decay. The total cros s section is in good agreement with the experimental value.