Table 1: Experimental radiative lifetimes of four levels in Os I.

Levela		 Energy J $\lambda_{\rm exc}^b$ $\lambda_{\rm obs}^c$ Lifetime (ns): Expd
  (cm-1)   (Å) (Å) This work K CB

5d56s2(6S)6p z $^{7}{\rm P}_{4}$		 28 331.736 4.0 4311.3 4135 265 (20) 238.0(12) 70.2
5d66s(6D)6p z $^{7}{\rm F}_{5}$ 30 279.921 5.0 3301.5 3977 93 (7) 91.0 (5) 27.5
5d66s(6D)6p z $^{7}{\rm F}_{4}$ 32 684.629 4.0 3058.6 3504 28 (2) 27.3 (2) 9.6
5d66s(6D)6p z $^{5}{\rm F}_{5}$ 34 365.335 5.0 2909.0 2909 24 (2)    
a Level notation from Van Kleef & Klinkenberg (1961).
b Laser wavelength used to populate the upper state.
c Wavelength used to detect the fluorescence signal.
d K = Kwiatkowski et al. (1984), CB = Corliss & Bozman (1962).

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