Ru II wavelengths and energy levels derived by Fourier transform spectroscopy

The RuII spectrum emitted from a hollow cathode discharge has been recorded in the region 12500-55500cm(-1) (8000-1800Angstrom) using a Fourier transform spectrometer. 538 RuII lines have been measured with high accuracy (+/- 0.003-0.020cm(-1)). Improved energy level values have been derived from the lines and 17 new even levels have been found. The level structure has been interpreted by means of parametric calculations.