**Table 9:** Comparison of lifetimes of low-lying states of Ra I.
Level	E (cm^-1)	Type	This work	MBPT^a	MCDHF^b	RHF^c	MCDF^d	RPP^e	EXP^f
6d7s ³D₁	13 715.85	E1	694 $\mu$ s	654 $\mu$ s		617 $\mu$ s
6d7s ³D₂	13 993.97	E2	3.0 s	3.3 s	4 s	15 s
7s7p ³P₁ $^{\circ}$	13 999.38	E1	281 ns	362 ns		505 ns	250 ns	420 ns	422(20) ns
7s7p ³P₂ $^{\circ}$	16 688.54	E1	6.4 $\mu$ s	5.55 $\mu$ s		5.2 $\mu$ s
6d7s ¹D₂	17 081.45	E1	-*	129 $\mu$ s		38 ms
7s7p ¹P₁ $^{\circ}$	20 715.71	E1	5.2 ns	5.53 ns		5.5 ns

^a Many-body perturbation theory (Dzuba & Ginges 2006). ^b Multiconfiguration Dirac-Hartree-Fock (Bieron et al. 2004). ^c Relativistic Hartree-Fock (Dzuba et al. 2000). ^d Multiconfiguration Dirac-Fock (Bruneau 1984). ^e Relativistic pseudo-potential (Hafner & Schwarz 1978). ^f Experiment (Scielzo et al. 2006). ^* Affected by severe cancellation effects.

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