COSTER-KRONIG DECAY OF 3P CORE-EXCITED STATES OF ATOMIC ZINC

By exciting the M shell of atomic zinc in the 80-110-eV photon energy range with synchrotron radiation, and by using photoelectron and photo ion detection, we have located the 3p(5)3d(10)4s2ns (and nd) excited s tates in the 91-99-eV region. Resonant satellites are observed, allowi ng us to demonstrate the dominant role played by the 3p-1ns1 --> 3d-2n 'lepsilonf interaction upon the decay of the 3p --> ns excited states. The 3p-1ns1 --> 3d-2n'lepsilonf super-Coster-Kronig processes produce a large broadening of the 3p excited states which form series of over lapping states. The resonant satellites lying in the high-energy regio n are singly ionized states of 3p(6)3d(8)4s2n'l configurations, which autoionize into the various 3p(6)3d(9)4p or 3p(6)3d(9)4s states of Zn2 +. Ab initio calculations using intermediate coupling have been perfor med and display good quantitative agreement with the experimental resu lts.