Abstract
The spectra of ruthenium and rhodium excited in a low-inductive vacuum spark have been obtained using a vacuum grazing-incidence spectrograph with a grating of 3600 lines/mm 3 m in radius in the range of 180–350 A. The bidium-like spectra of Ru VIII and Rh IX were analyzed. Ten spectral lines of the 4p64d-4p54d2 transitions are identified and six energy levels in the 4p54d2 configuration with an excited internal electron were found for each ion for the first time.
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