Table 3: The strongest lines from the a \ensuremath{^{3}{\rm {P}}_{}} levels. The lines lacking experimental branching fractions (BFs) are either too weak to be detected or have wavelengths outside the observed spectral region. The residual is the total contribution from the transitions from the upper level not included in the table.
Upper level Lower level $\lambda_{\rm vac}$ (Å) BF $_{\rm exp}$ (%) BF$_{\rm th}$ (%) $A_{{\rm exp}}$ (s-1)a $A_{{\rm theory}}$ (s-1)
a \ensuremath{^{3}{\rm {P}}_{0}} a3F2 13752.83   4.34   0.0302
  a3D2 8328.91 95.6 $\pm$ 4 95.6 0.75 $\pm$ 0.08 0.666
  Weaker transitions (total)   0.06    
a \ensuremath{^{3}{\rm {P}}_{1}} a3F2 13701.20   1.48   0.0103
  a3F3 13854.39   2.79   0.0195
  a3D2 8309.94   7.98   0.0557
  a3D3 8386.63 40.0 $\pm$ 6 43.0 0.28 $\pm$ 0.06 0.300
  a3D1 8263.44 47.7 $\pm$ 7 44.7 0.34 $\pm$ 0.07 0.312
  Weaker transitions (total)   0.05    
a \ensuremath{^{3}{\rm {P}}_{2}} a3F3 13753.55   0.87   0.0061
  a3F4 13953.56   3.10   0.0217
  a3D2 8273.56 27.8 $\pm$ 5 34.2 0.23 $\pm$ 0.04 0.239
  a3D3 8349.57 58.7 $\pm$ 8 52.3 0.47 $\pm$ 0.07 0.366
  a3D1 8227.46   9.09   0.0636
  Weaker transitions (total)   0.04    
a The uncertainty is derived from the uncertainty of the lifetimes and the branching fractions.

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