Abstract

The 33S1-33P0,1,2 transitions in helium-like oxygen have been observed in a foil-excited beam using a 'Doppler cancellation' light-enhancement technique applied to a grating spectrometer. The wavelengths of these transitions were measured at oxygen beam energies of 13.5, 18.0 and 23.5 MeV. The results are compared with calculations of the fine-structure splitting and with estimates of the Lamb shift of the 33S and 33P levels.

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