THE 5D(2)-5D6P TRANSITIONS IN AU-X AND HG-XI

The spectra of gold and mercury were photographed in the 100-300 Angst rom region on grazing incidence spectrographs at the Antigonish, Troit sk and Gaithersburg laboratories. The source used in each laboratory w as a triggered spark. The 5d(2)-5d6p transitions in Au X and Hg XI wer e analysed. All nine levels of the 5d(2) configuration and eleven of t he twelve levels of the 5d6p configuration of both spectra have been i dentified. The only unknown level is the 5d6p P-3(0).( )38 lines in th e 233-292 Angstrom region in Au X and 38 lines in the 200-256 Angstrom regions in Hg XI have been classified. Hartree-Fock (HF) and Least-Sq uare-Fitted (LSF) calculations interpret the spectra satisfactorily.