Table 3: New Os I lifetimes, wavelengths, branching fractions, and transition probabilities.

Upper level		 Lower level $\sigma$ $\lambda_{{\rm air}}$ $BF_{\rm exp.}$ $BF_{\rm th.}$ Aik Unc.
lifetime   (cm-1) (Å)     (106 s-1) (%)

5d56s2(6S)6p z $^{7}{\rm P}_{4}$		 5d66s2 a5D4 28 331.736 3528.602 0.287 0.306 1.08 11
$\tau= 265.0$ ns 5d66s2 a5D3 24 172.410 4135.781 0.515 0.651 1.94 9
  5d7(4F)6s a5F5 23 187.833 4311.393 0.195 0.025 0.73 11
  5d7(4F)6s a5F4 19 187.948 5103.497 0.002 0.016 0.01 13
  Residual     0.001      
5d66s(6D)6p z $^{7}{\rm F}_{5}$ 5d66s2 a5D4 30 279.921 3301.567 0.935 0.857 10.05 7
$\tau= 93.0$ ns 5d7(4F)6s a5F5 25 136.049 3977.225 0.061 0.141 0.66 16
  5d7(4F)6s a5F4 21 537.179 4641.833 0.003 0.001 0.03 17
  Residual     0.001      
5d66s(6D)6p z $^{7}{\rm F}_{4}$ 5d66s2 a5D4 32 684.629 3058.652 0.883 0.455 31.53 7
$\tau= 28.0$ ns 5d66s2 a5D3 28 525.263 3504.662 0.044 0.513 1.57 13
  5d7(4F)6s a5F5 27 540.672 3629.958 0.002 0.001 0.08 14
  5d7(4F)6s a5F4 23 941.834 4175.612 0.042 0.023 1.51 13
  5d7(4F)6s a3F4 21 654.104 4616.769 0.017 0.001 0.60 14
  5d7(4F)6s a5F3 21 306.652 4692.056 0.007 0.002 0.25 14
  Residual     0.004      
5d66s(6D)6p z $^{5}{\rm F}_{5}$ 5d66s2 a5D4 34 365.335 2909.057 0.978 0.926 40.77 7
$\tau= 28.0$ ns 5d7(4F)6s a5F5 29 221.472 3421.160 0.003 0.066 0.14 17
  5d7(4F)6s a5F4 25 622.608 3901.698 0.007 0.006 0.28 17
  5d7(4F)6s a3F4 23 334.750 4284.248 0.010 <0.001 0.40 17
  Residual     0.002      
5d66s(6D)6p z $^{7}{\rm D}_{4}$ 5d66s2 a5D4 22 615.656 4420.474 0.988 0.983    
a 5d66s2 a5D3 18 456.293 5416.700 0.001 0.001    
  5d7(4F)6s a5F5 17 471.770 5721.931 0.008 0.012    
  Residual     0.004      
5d66s(6D)6p z $^{7}{\rm D}_{5}$ 5d66s2 a5D4 23 462.896 4260.849 0.992 0.992 1.24 9
$\tau= 800(70)$b ns Residual     0.008      
a No experimental lifetime available.
b Lifetime measurements by Kwiatkowski et al. (1984).

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