HIGH RESOLUTION OPTOGALVANIC SPECTROSCOPY AS A USEFUL TOOL IN THE DETERMINATION OF ATOMIC HYPERFINE PARAMETERS AND ISOTOPIC SHIFTS H.-O. Behrens et G. H. GuthöhrleinJ. Phys. Colloques, 44 C7 (1983) C7-149-C7-168DOI: https://doi.org/10.1051/jphyscol:1983713