Table 6: Comparison between experimental (Träbert et al. 2003) and theoretical lifetimes for some levels of Fe IX.

(a) $\tau$ (in ms)

Level Experimental Present Calculations Flower (1977)

3s²3p⁵3d ³D^o₃ 29 $\pm$ 3 32.02 33

3s²3p⁵3d ³D^o₂ 10.5 $\pm$ 1 9.55 10

3s²3p⁵3d ¹F^o₃ 6.9 $\pm$ 0.3 7.36 7.9

(b) $\tau$ (in s), $a{\pm}b \equiv a{\times}$ 10 $^{{\pm}b}$

Level Present Calculations Verma et al. (2006)

3s²3p⁵3d ³P^o₁ 7.119-08 7.9923-08

3s²3p⁵3d ³D^o₁ 3.692-09 3.8158-09

3s²3p⁵3d ¹P^o₁ 3.957-12 4.4127-12

3s3p⁶3d ³D₁ 1.222-10 1.8909-10

3s3p⁶3d ³D₂ 1.220-10 1.8856-10

3s3p⁶3d ³D₃ 1.215-10 1.8800-10

3s3p⁶3d ¹D₂ 2.613-10 4.4887-10

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