Lines of Ar I, II, and III are identified in high-resolution Fourier Transform spectra of a hollow-cathode source covering the range 222-5865 nm. Ar II and III level energies are extracted and compared with earlier measurements. Selected Ar II lines suitable for use as secondary wavelength standards are measured relative to precise wavelengths of CO molecular lines.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.