Sr+

Click on a "Nuclear data" button to display properties of isotopes with a half-life exceeding 10 minutes (3 minutes for Fr).
Click on a "Hyperfine constant A" button to display the values of magnetic-dipole hyperfine constants A (in MHz) complied from published papers.
If the atom/ion has metastable states a "Metastable state properties" button will show with a list of metastable states. Click on the button to display the data for dominant electric quadrupole (E2) and magnetic dipole (M1) transitions, lifetimes, and quadrupole moments.
Click on a "Ref" button to display the sources of the data.
Click on the "Print" button to print the tables you see on the screen.

Isotopes with half life more than 3 minutes are listed Fr, more than 10 minutes for all other cases.

N.J. Stone, Table of recommended nuclear magnetic dipole moments: Part I, long-lived states, INDC(NDS)-079 Available online

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Juris Meija et al., Isotopic compositions of the elements 2013 (IUPAC Technical Report), Pure Appl. Chem. 88, 293 (2016), DOI

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I. Angeli, K.P. Marinova,Table of experimental nuclear ground state charge radii: An update, Atomic Data and Nuclear Data Tables 99, 69 (2013), DOI, Weblink

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N.J. Stone, Table of nuclear electric quadrupole moments, At. Data Nucl. Data Tables 111-112, 1 (2016), DOI

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4d_3/2 4d_5/2

Isotope info	Mass number	Symbol	Half-life info	Natural abundance (%) info	Nuclear spin	Rms radii (fm) info	Rms radii (fm)	Uncertainty (fm)	Magnetic moment (μ_N) info	Magnetic moment (μ_N)	Uncertainty (μ_N)	Quadrupole moment (b) info	Quadrupole moment (b)	Uncertainty (b)
⁸¹Sr	81	Sr	22.3 minutes		1/2	4.2547(34)	4.2547	0.0034	0.543(4)	0.543	0.004
⁸³Sr	83	Sr	32.4 hours		7/2	4.2455(27)	4.2455	0.0027	-0.8295(7)	-0.8295	0.0007	0.708(11)	0.708	0.011
⁸⁴Sr	84	Sr	Stable	0.56	0	4.2394(24)	4.2394	0.0024
⁸⁵Sr	85	Sr	64.8 days		9/2	4.2304(21)	4.2304	0.0021	-1.0001(7)	-1.0001	0.0007	0.263(14)	0.263	0.014
⁸⁶Sr	86	Sr	Stable	9.86	0	4.2307(20)	4.2307	0.002
⁸⁷Sr	87	Sr	Stable	7.00	9/2	4.2249(19)	4.2249	0.0019	-1.09316(11)	-1.09316	0.00011	0.305(2)	0.305	0.002
⁸⁸Sr	88	Sr	Stable	82.58	0	4.2240(18)	4.224	0.0018
⁸⁹Sr	89	Sr	50.6 days		5/2	4.2407(23)	4.2407	0.0023	-1.148(2)	-1.148	0.002	-0.253(8)	-0.253	0.008
⁹¹Sr	91	Sr	9.65 hours		5/2	4.2740(46)	4.274	0.0046	-0.885(2)	-0.885	0.002	0.042(10)	0.042	0.01

Isotope	State	Theory	Key1 info	Experiment	Key2 info	Reference1 info	DOI1 info	Reference2 info	DOI2 info
⁸⁷Sr⁺	5s_1/2			-1000.473673(11)	E68			H. Sunaoshi, Y. Fukashiro, M. Furukawa, M. Yamauchi, S. Hayashibe, T. Shinozuka, M. Fujioka, I. Satoh, M. Wada, and S. Matsuki, Hyperfine Interact. 78, 241 (1993)	https://doi.org/10.1007/BF00568145
	6s_1/2	-296.04	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	7s_1/2	-129.91	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	8s_1/2	-68.65	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	9s_1/2	-40.68	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	5p_1/2	-177.33	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	6p_1/2	-63.4	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	7p_1/2	-30.26	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	8p_1/2	-16.82	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	9p_1/2	-10.43	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	5p_3/2	-35.26	E66	-36.0(4)	E67	U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504	F. Buchinger, E. B. Ramsay, E. Arnold, W. Neu, R. Neugart, K. Wendt, R. E. Silverans, P. Lievens, L. Vermeeren, D. Berdichevsky, R. Fleming, D. W. L. Sprung, and G. Ulm\nPhys. Rev. C 41, 2883 (1990)	https://doi.org/10.1103/PhysRevC.41.2883
	6p_3/2	-12.65	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	7p_3/2	-6.06	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	8p_3/2	-3.37	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	9p_3/2	-2.09	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	4d_3/2	-46.7	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	5d_3/2	-10.73	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	6d_3/2	-4.69	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	7d_3/2	-2.5	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	8d_3/2	-1.49	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	9d_3/2	-0.96	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	4d_5/2			2.1743(14)	E69			G. P. Barwood, K. Gao, P. Gill, G. Huang, and H. A. Klein, Phys. Rev. A 67, 013402 (2003)	https://doi.org/10.1103/PhysRevA.67.013402
	5d_5/2	-1.93	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	6d_5/2	-1.1	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	7d_5/2	-0.65	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	8d_5/2	-0.41	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504
	9d_5/2	-0.28	E66			U. I. Safronova, Phys. Rev. A 82, 022504 (2010)	https://doi.org/10.1103/PhysRevA.82.022504

State	Property	Theory	Experiment
4d_3/2	Lifetime	0.4410(26) s
4d_5/2	Lifetime	0.3945(23) s
4d_3/2	Quadrupole moment	2.029(12) a.u.	Dansha Jiang, Bindiya Arora, and M. S. Safronova Phys. Rev. A 78, 022514 (2008)	https://doi.org/10.1103/PhysRevA.78.022514
4d_5/2	Quadrupole moment	2.935(17) a.u.	Dansha Jiang, Bindiya Arora, and M. S. Safronova Phys. Rev. A 78, 022514 (2008)	https://doi.org/10.1103/PhysRevA.78.022514	2.973(+0.026)(−0.033)	R. Shaniv, N. Akerman, and R. Ozeri, Phys. Rev. Lett. 116, 140801 (2016)	https://doi.org/10.1103/PhysRevLett.116.140801

Initial	Final	Transition	Wavelength (nm)	Matrix element	Units	Transition rate (s ^-1)	Branching ratio
4d_3/2	5s_1/2	E2	687.0066	11.133(33)	a.u.	2.267(14)	1
4d_5/2	5s_1/2	E2	674.0252	13.745(40)	a.u.	2.535(15)	0.9999062
4d_5/2	4d_3/2	M1	35671	1.549	μ_B	2.377E-04	0.0000938