Experimental tests of the spectroscopic coupling for neutral oxygen

The radiation emitted from a high-current wall-stabilized arc operated in helium with some admixture of CO₂ has been studied. Intensities of fine structure components for 10 multiplets of neutral oxygen (O I) have been determined applying the emission method. On the basis of measured line intensities relative line strengths within each studied multiplet have been obtained. The results are compared with data resulting from the LS-coupling scheme and with other theoretical as well as experimental results available in literature.