Hyperfine-splitting constants in optical spectrum of HfI Anastasov, A. Ya. ; Gangrskii, Yu. P. ; Zemlyanoi, S. G. ; Genova, B. ; Marinova, K. P. ; Nadzhakov, E. G. ; Kul'Dzhanov, B. K. Abstract Publication: Optics and Spectroscopy Pub Date: August 1996 Bibcode: 1996OptSp..81..169A