Ca+

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.

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)
⁴⁰Ca	40	Ca	Stable	96.94	0	3.4776(19)	3.4776	0.0019
⁴¹Ca	41	Ca	1.0x10⁵ years		7/2	3.4780(19)	3.4776	0.0019	-1.59443(7)	-1.59443	7e-05	-0.0665(18)	-0.0665	0.0018
⁴²Ca	42	Ca	Stable	0.65	0	3.5081(21)	3.5081	0.0021
⁴³Ca	43	Ca	Stable	0.14	7/2	3.4954(19)	3.4954	0.0019	-1.31733(6)	-1.31733	6e-05	-0.0408(8)	-0.0408	0.0008
⁴⁴Ca	44	Ca	Stable	2.09	0	3.5179(21)	3.5179	0.0021
⁴⁵Ca	45	Ca	163 days		7/2	3.4944(21)	3.4944	0.0021	-1.3264(13)	-1.3264	0.0013	0.038(12)	0.038	0.012
⁴⁶Ca	46	Ca	Stable	0.004	0	3.4953(20)	3.4953	0.002
⁴⁷Ca	47	Ca	4.5 days		7/2	3.4783(24)	3.4783	0.0024	-1.4064(11)	-1.4064	0.0011
⁴⁸Ca	48	Ca	Stable	0.19	0	3.4771(20)	3.4771	0.002

Isotope	State	Theory	Key1 info	Experiment	Key2 info	Reference1 info	DOI1 info	Reference2 info	DOI2 info
⁴³Ca⁺	4s_1/2			-806.40207160(8)	E71			F. Arbes, M. Benzing, Th. Gudjons, F. Kurth, and G. Werth, Z. Phys. D 31, 27 (1994)	https://doi.org/10.1007/BF01426573
	5s_1/2	-236.3	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	6s_1/2	-102.33	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	7s_1/2	-53.53	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	4p_1/2	-144.96	E70	-145.4(1)	E72	M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503	W. Nörtershäuser, K. Blaum, K. Icker, P. Müller, A. Schmitt, K. Wendt, and B. Wiche, Eur. Phys. J. D 2, 33 (1998)	https://doi.org/10.1007/s100530050107
	5p_1/2	-50.71	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	6p_1/2	-23.81	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	7p_1/2	-13.08	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	4p_3/2	-30.34	E70	-31.0(2)	E72	M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503	W. Nörtershäuser, K. Blaum, K. Icker, P. Müller, A. Schmitt, K. Wendt, and B. Wiche, Eur. Phys. J. D 2, 33 (1998)	https://doi.org/10.1007/s100530050107
	5p_3/2	-10.58	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	6p_3/2	-4.97	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	7p_3/2	-2.73	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	3d_3/2	-47.63	E70	-47.3(2)	E72	M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503	W. Nörtershäuser, K. Blaum, K. Icker, P. Müller, A. Schmitt, K. Wendt, and B. Wiche, Eur. Phys. J. D 2, 33 (1998)	https://doi.org/10.1007/s100530050107
	4d_3/2	-9.35	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	5d_3/2	-3.88	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	6d_3/2	-1.99	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	7d_3/2	-1.17	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	3d_5/2	-4.24	E70	-3.8(6)	E72	M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503	W. Nörtershäuser, K. Blaum, K. Icker, P. Müller, A. Schmitt, K. Wendt, and B. Wiche, Eur. Phys. J. D 2, 33 (1998)	https://doi.org/10.1007/s100530050107
	4d_5/2	-3.06	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	5d_5/2	-1.49	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	6d_5/2	-0.831	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	7d_5/2	-0.502	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	4f_5/2	-0.163	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	5f_5/2	-0.089	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	6f_5/2	-0.053	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	7f_5/2	-0.034	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	4f_7/2	-0.044	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	5f_7/2	-0.011	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503
	6f_7/2	-0.002	E70			M. S. Safronova and U. I. Safronova, Phys. Rev. A 83, 012503 (2011)	https://doi.org/10.1103/PhysRevA.83.012503

State	Property	Theory	Experiment
3d_3/2	Lifetime	1.194(11) s	1.176(11) s	A. Kreuter, C. Becher, G. P. T. Lancaster, A. B. Mundt, C. Russo, H. Häffner, C. Roos, W. Hänsel, F. Schmidt-Kaler, R. Blatt, and M. S. Safronova, Phys. Rev. A 71, 032504 (2005)	https://doi.org/10.1103/PhysRevA.71.032504
3d_5/2	Lifetime	1.163(11) s	1.168(9) s	A. Kreuter, C. Becher, G. P. T. Lancaster, A. B. Mundt, C. Russo, H. Häffner, C. Roos, W. Hänsel, F. Schmidt-Kaler, R. Blatt, and M. S. Safronova, Phys. Rev. A 71, 032504 (2005)	https://doi.org/10.1103/PhysRevA.71.032504
3d_3/2	Quadrupole moment	1.289(11) a.u.	Dansha Jiang, Bindiya Arora, and M. S. Safronova Phys. Rev. A 78, 022514 (2008)	https://doi.org/10.1103/PhysRevA.78.022514
3d_5/2	Quadrupole moment	1.849(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

Initial	Final	Transition	Wavelength (nm)	Matrix element	Units	Transition rate (s ^-1)	Branching ratio
3d_3/2	4s_1/2	E2	732.5905	7.945(38)	a.u.	0.8376(79)	1
3d_5/2	4s_1/2	E2	729.3478	9.750(46)	a.u.	0.8598(81)	0.9999972
3d_5/2	3d_3/2	M1	164800	1.549	μ_B	2.412E-06	0.0000028

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