ENERGY-LEVELS OF HIGH L-STATES IN NEUTRAL AND SINGLY IONIZED ARGON

The spectra of Cu, Mg and V, produced by a hollow cathode with Ar and Ne as carrier gases, have been registered in the infrared region (1800 -9000 cm(-1)) with the Fourier-Transform spectrometer at the National Solar Observatory on Kitt Peak. Four groups of lines around 2.6, 4.0, 4.6 and 4.7 mu m have been investigated. Many of these emission lines have been identified as 3p(5)(P-2)3d-4f, 4f-5g, 4f-6g, 4f-7g, 5f-7g an d 5g-7h transitions in Ar I and 3p(4)(P-3)7h-8i and 7i-8k transitions in Ar II. From these observations, it has been possible to determine t he energies of 29 new levels belonging to the 3p(5)(P-2)6g, 7g and 7h configurations in Ar I and to the 3p(4)(P-3)8i and 8k configurations i n Ar II.