The hyperfine structure of the 3067-A line of 15-d 205 Bi was measured by optical spectroscopy. The results are A( i P i/2 ) = 166(4)x 10~3 cm" 1 , giving \x = 4.13(11)/^, and 192 (14) x 10" 3 cm" 1 for the 205 Bi-209 Bi isotope shift. A reexamination of the 207 Bi hfs shows accord with previous spectroscopic results \p. = 4.07(2)^] , but not with the recent nuclear orientation finding by Johnston, Kaplan, and Stone that ^( 207 Bi) is substantially larger than J U ( 209 Bi). Calculations of magnetic moments of odd bismuth isotopes, including configuration mixing and pion-exchange contributions, are in agreement with our experiments.

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