**Table 2:** Experimental radiative lifetimes of two levels in Ir I.
Level^a	Energy	J	$\lambda_{\rm exc}^b$	$\lambda_{\rm obs}^c$	Lifetime (ns): Exp^d
	(cm^-1)		(Å)	(Å)	This work		G
5d⁷6s(⁵F)6p z $^{6}{\rm F}_{11/2}$	28 452.32	5.5	3513.6	3902	320	(30)	340(10)
5d⁷6s(⁵F)6p z $^{6}{\rm D}_{9/2}$	26 307.49	4.5					580(10)

^a Level notation from Van Kleef (1957).
^b Laser wavelength used to populate the upper state.
^c Wavelength used to detect the fluorescence signal.
^d G = Gough et al. (1983).

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