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Table 1:

Calculated and experimental lifetimes for Nb II levels of the 4d35p configuration.
    Theory Experiment
Desig.a Ea $\tau $(ns) $\tau $(ns) $\tau $(ns) $\tau $(ns) $\tau $(ns)
  (cm-1) HFR(A) HFR(B)      
    this work this work previous this work previous
4d3(4F)5p 5G$_2^\circ$ 33 351.09 5.0 5.6     5.9(4)e
4d3(4F)5p 5G$_3^\circ$ 33 919.24 4.9 5.5 5.16b, 6.53c   6.2(3)d, 5.8(3)e
4d3(4F)5p 5G$_4^\circ$ 34 632.03 4.7 5.3     5.8(3)d, 5.5(3)e
4d3(4F)5p 3D$_1^\circ$ 34 886.35 5.1 5.9   5.6(3) 5.5(3)d, 5.7(3)e
4d3(4F)5p 5G$_5^\circ$ 35 474.20 4.6 5.2     5.3(3)d, 5.3(3)e
4d3(4F)5p 3D$_2^\circ$ 35 520.82 4.8 5.7   5.5(3) 5.7(3)d, 5.7(3)e
4d3(4F)5p 5G$_6^\circ$ 36 455.46 4.4 5.0     5.0(3)d, 5.1(3)e
4d3(4F)5p 3D$_3^\circ$ 36 553.24 4.2 5.0 4.67b, 5.60c   5.0(3)d, 5.0(3)e
4d3(4F)5p 5F$_1^\circ$ 36 731.81 4.0 4.7     4.7(3)e
4d3(4F)5p 5F$_2^\circ$ 36 962.77 4.0 4.7     4.7(3)e
4d3(4F)5p 5D$_0^\circ$ 37 298.24 2.3 2.7   2.6(2) 3.1(3)e
4d3(4F)5p 5F$_3^\circ$ 37 376.90 3.9 4.6     4.7(3)e
4d3(4F)5p 5D$_1^\circ$ 37 480.08 2.4 2.7     3.1(3)e
4d3(4F)5p 5F$_4^\circ$ 37 528.38 3.8 4.4     4.6(3)e
4d3(4F)5p 5D$_2^\circ$ 37 797.32 2.6 2.8   2.7(2) 3.2(3)e
4d3(4F)5p 5F$_5^\circ$ 38 024.34 3.9 4.6     4.6(3)e
4d3(4F)5p 5D$_3^\circ$ 38 216.39 2.7 3.0     3.4(3)e
4d3(4F)5p 5D$_4^\circ$ 38 291.25 2.6 3.0     3.3(3)e
4d3(4F)5p 3G$_3^\circ$ 38 684.96 4.5 5.1     5.0(3)e
4d3(4F)5p 3F$_2^\circ$ 38 984.39 6.8 7.3     7.3(3)e
4d3(4F)5p 3G$_4^\circ$ 39 335.27 4.5 5.1     5.1(3)e
4d3(4F)5p 3F$_3^\circ$ 39 779.92 6.3 6.9     6.8(3)e
4d3(4F)5p 3G$_5^\circ$ 40 103.61 4.4 5.0   5.1(3) 5.2(3)e
4d3(4F)5p 3F$_4^\circ$ 40 561.02 5.8 6.3     6.4(3)e
4d3(4P)5p 3P$_2^\circ$ 41 710.14 7.9 8.4   8.5(7)  
4d3(4P)5p 3P$_1^\circ$ 42 132.65 6.5 7.2   7.2(5)  
4d3(4P)5p 5D$_0^\circ$ 42 596.55 6.3 7.2   7.5(7)  
4d3(4P)5p 5D$_2^\circ$ 43 290.34 6.9 7.3   7.5(4)  
4d3(2P)5p 1D$_2^\circ$ 43 618.39 6.4 6.7   6.7(3)  
4d3(2P)5p 3D$_1^\circ$ 43 649.19 8.4 8.1   7.2(4) 12.8(3)e
4d3(4P)5p 5D$_3^\circ$ 43 887.08 5.9 6.3   5.7(5)  
4d3(4P)5p 5D$_1^\circ$ 44 066.67 5.8 6.7   6.4(5) 5.3(3)e
4d3(4P)5p 3P$_0^\circ$ 44 285.94 6.6 7.5   7.0(5)  
4d3(2P)5p 3D$_2^\circ$ 44 924.60 5.9 6.6   6.2(3)  
4d3(4P)5p 5D$_4^\circ$ 44 970.71 5.1 5.8   5.2(5)  
4d3(2P)5p 3D$_3^\circ$ 45 802.47 4.9 4.6   4.6(3)  
4d3(2H)5p 3H$_6^\circ$ 48 770.84 4.5 3.7     4.2(3)e

Notes. (a) From Ryabtsev et al. (2000); (b) from Beck & Datta (1995): length form; (c) from Beck & Datta (1995): velocity form; (d) from Salih & Lawler (1983); (e) from Hannaford et al. (1985). A(B) is written for $A \pm B$.


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