For an explanation of the measurement technique, see Passive lifetime measurement technique at TSR

Atomic lifetime measurements on
E1 intercombination transitions
at the Heidelberg heavy-ion storage ring TSR

Isolectronic sequence	Ion	Level	Lifetime	Observation	Reference
Be I	B+	2s2p 3Po1	97.65±0.5 ms	UV	9
	C2+		9.714±0.013 ms	VUV	5
	N3+		2.0±0.3 ms	ionization	3,4,16
			1.73±0.01 ms	VUV	24
	O4+		0.458±0.015 ms	ionization	3,4,16
			0.432±0.009 ms	VUV	24
B I	C+	2s2p2 4P1/2	7.95±0.07 ms	UV	10
	C+	2s2p2 4P3/2	104.1±0.5 ms	UV	10
	C+	2s2p2 4P5/2	22.05±0.07 ms	UV	10
	N2+	2s2p2 4P1/2	1.32±0.05 ms	UV	10
	N2+	2s2p2 4P3/2	13.9±0.2 ms	UV	10
	N2+	2s2p2 4P5/2	3.3±0.07 ms	UV	10
C I	N+	2s2p3 5So2	5.88±0.03 ms	UV	10
	O2+		1.25±0.02 ms	VUV	12

Atomic lifetime measurements on
electric-dipole - forbidden transitions
at the Heidelberg heavy-ion storage ring TSR

Isolectronic sequence	Ion	Level	Lifetime	Observation	Reference
He I	Li+	1s2s 3S1	52.2±5.0 s	DR	8
	Be2+		1.80±0.05 s	EUV/residual gas ionization	20
	B3+		149.8±0.45 ms	DR	2
	C4+		20.589±0.042 ms	DR	1,2
	N5+		3.905±0.05 ms	DR	1,2
B I	Cl12+	2s22p 2Po3/2	21.2±0.6 ms	vis	18
	Ti17+		0.627±0.010 ms	VUV	11
C I	N+	2s22p2 1S0	910±220 ms	vis	25
	O2+		530±25 ms	UV/vis	12
	F3+		304±5 ms	UV	12
	Ne4+		128±16 ms	UV	31
	Si8+	2s22p2 1D2	38.3±0.3 ms	VUV/UV	7
	P9+		17.74±0.035 ms	VUV/UV	29
	S10+		8.684±0.009 ms	VUV/UV	29
N I	Si7+	2s22p3 2Po1/2	23.5±1.0 ms	UV	12
		2s22p3 2Po3/2	9.63±0.7 ms	UV	12
	P8+	2s22p3 2Po1/2	10.17±0.12 ms	UV	29
		2s22p3 2Po3/2	4.22±0.10 ms	UV	12
	S9+	2s22p3 2Po1/2	5.20±0.15 ms	UV	29
		2s22p3 2Po3/2	2.10±0.06 ms	UV	12
O I	F+	2s22p4 1S0	423±10 ms	UV	13
	Ne2+		213±4 ms	VUV/UV	14
	Si6+	2s22p4 1D2	63.6±0.7 ms	VUV/UV	7
	P7+		28.63±0.08 ms	VUV/UV	29
	S8+		13.79±0.05 ms	VUV/UV	29
F I	Sc12+	2s22p5 2Po1/2	1.00±0.03 ms	UV	9
	Ti13+		0.513±0.010 ms	UV	11
Mg I	Co15+	3s3p 3Po2	13.6±1.8/5.5±2.5 ms	vis	28
	Ni16+		7.672±0.015 ms	vis	28
	63,65Cu17+	3s3p 3Po2	4.04±0.02 ms	UV	28
	63Cu17+	3s3p 3Po0		EUV	28
	65Cu17+			EUV	28
Al I	Ni15+	3s23p 2Po3/2	5.27±0.07 ms	UV	28
		3s3p3d 4Fo9/2	10.0±0.7 ms	UV	28
	Cu16+	3s23p 2Po3/2	3.05±0.145 ms	UV	30
	Cu16+	3s3p3p 4Fo7/2	5.51±1.56 ms	cascade	30
Si I	Cl3+	3s23p2 1S0	166±8.4 ms	UV	30
	Mn11+	3s23p2 1D2	13.8 ±0.3 ms	UV	30
	Fe12+		8.1±0.2 ms	UV	17
	Co13+		3.69±0.21 ms	UV	27
	Ni14+		2.25±0.05 ms	UV	27
	Cu15+		1.43±0.07 ms	UV	30
	Cu15+	3s23p2 3P1	8.20±0.15 ms	UV	30
	Ge18+		1.85±0.41 ms	UV	30
	Cu15+	3s23p2 3P2	32.2±0.2 ms	cascade	30
	Ge18+		14.3±4.1 ms	cascade	30
	Fe12+	3s23p3d 3Fo4	9.9±0.4 ms	cascade	19
	Co13+		6.59±0.24ms	cascade	27
	Ni14+		4.85±0.12ms	cascade	27
	Cu15+		3.31±0.04ms	cascade	30
P I	Mn10+	3s23p3 2Po3/2	2.39±18 ms	UV	30
		3s23p3 2Do3/2	34.6±0.3 ms	UV	30
		3s23p3 2Do5/2	735±10 ms	UV	30
	Fe11+	3s23p3 2Po1/2	4.1±0.12 ms	UV	17
		3s23p3 2Po3/2	1.70±0.02 ms	UV	17
		3s23p3 2Do3/2	18.0±0.1 ms	UV	17
		3s23p3 2Do5/2	306±10 ms	UV	17
	Co12+	3s23p3 2Do3/2	10.9±0.1 ms	UV	26
		3s23p3 2Do5/2	151±1 ms	UV	26
	Ni13+	3s23p3 2Do3/2	5.3±0.05ms	UV	26
		3s23p3 2Do5/2	70±1 ms	UV	26
	Cu14+	3s23p3 2Do3/2	3.02±0.03 ms	UV	30
		3s23p3 2Do5/2	35.0±0.3 ms	UV	30
S I	Ar2+	3s23p4 1S0	145±5 ms	UV	15
	Mn9+	3s23p4 1D2	20.9±0.5 ms	UV	30
	Fe10+		11.05±0.1 ms	UV	17
		3s23p33d 3Go4	68±4 ms	UV	17
	Co11+	3s23p4 1D2	6.91±0.05 ms	UV	27
	Ni12+		4.06±0.12 ms	UV	27
		3s23p4 3P1	6.50±0.15 ms	green	23
	Cu13+	3s23p4 1D2	2.69±0.05 ms	blue	30
		3s23p4 3P1	3.60±0.12 ms	blue	23
Cl I	Fe9+	3s23p4 (3P) 3d 2F7/2	17.0±1.7 ms	VUV	17
		3s23p4 (1D) 3d 2F7/2	4.9±0.4 ms	VUV/UV	17
		3s23p43d 4F7/2	70±25 ms	UV	17
		3s23p4 (3P) 3d 4F9/2	110±5 ms	UV	19
	Fe9+	3s23p5 2P1/2	14.4±0.14 ms	red	21,22
	Co10+		7.66±0.04 ms	green	26
	Ni11+		4.17±0.06 ms	blue	21
	Cu12+		2.37±0.01 ms	UV	21
Ar I	Fe8+	3s23p53d 3D3	29±3 ms	UV	19
		3s23p53d 3D2	10.5±1 ms	UV	19
		3s23p43d 1F3	6.9±0.3 ms	UV	19
Ca I	Fe6+	3s23p63d2 1S0	29.6±1.8 ms	UV	19

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Recent reviews put the above work into context and also cover more measurements of such long atomic level lifetimes, using a variety of ion trap types.
Physica Scripta 61, 257 (2000)
Physica Scripta T 100, 88 (2002)
Can. J. Phys. 80, 1481 (2002)

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