Cross sections for photoabsorption and 3p(4)4s,3d satellite production at energies of the doubly excited Ar 3p(4)(P-3)4s P-2(3/2),(1/2) np resonances

摘要

The photoabsorption of Ar is studied experimentally and theoretically for energies between 32.5 eV and 33.0 eV. Resonant excitation and autoionization of doubly excited 3p(4)(P-3)4s P-2(3/2,1/2) np Rydberg states are observed as dominant mechanism to populate doublet and quartet satellites of the 3p(4)4s, 3d configurations. The perturbation of the Rydberg series by promoter states is reproduced by the calculations. Measured and calculated cross sections for the strong decay channels are in good agreement. A mirror behaviour of the 3s vacancy creation and the satellite production and the influence of the radiative decay of high-lying Rydberg states on the shape of a satellite threshold are manifested.