Be+

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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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)
⁷Be	7	Be	53.2 days		3/2	2.6460(160)	2.646	0.016	-1.399280(4)	-1.39928	4e-05
⁹Be	9	Be	Stable	100	3/2	2.519(12)	2.519	0.012	-1.177430(5)	-1.17743	5e-06	0.0529(4)	0.0529	0.0004
¹⁰Be	10	Be	1.5x10⁶ years		0	2.355(17)	2.355	0.017

Isotope	State	Theory	Key1 info	Experiment	Key2 info	Reference1 info	DOI1 info	Reference2 info	DOI2 info
⁹Be⁺	2s_1/2			−625. 008837044(12)	E92			N. Shiga, W. M. Itano, and J. J. Bollinger, Phys. Rev. A 84, 012510 (2011)	https://doi.org/10.1103/PhysRevA.84.012510
	2p_1/2			-118.00(4)	E91			W. Nörtershäuser et al., Phys. Rev. Lett. 102, 062503 (2009)	https://doi.org/10.1103/PhysRevLett.102.062503
	2p_3/2	−1.015(3)	E93			V. A. Yerokhin, Phys. Rev. A 78, 012513 (2008)	https://doi.org/10.1103/PhysRevA.78.012513
	3s_1/2	−158.897(7)	E93			V. A. Yerokhin, Phys. Rev. A 78, 012513 (2008)	https://doi.org/10.1103/PhysRevA.78.012513
	4s_1/2	-62.43	E94			F. W. King, J. Phys. Chem. A 113, 4110 (2009)	https://doi.org/10.1021/jp8105277
	5s_1/2	-30.66	E94			F. W. King, J. Phys. Chem. A 113, 4110 (2009)	https://doi.org/10.1021/jp8105277
	6s_1/2	-17.29	E94			F. W. King, J. Phys. Chem. A 113, 4110 (2009)	https://doi.org/10.1021/jp8105277
⁷Be⁺	2s_1/2			-742.90(25)	E91			W. Nörtershäuser et al., Phys. Rev. Lett. 102, 062503 (2009)	https://doi.org/10.1103/PhysRevLett.102.062503
	2p_1/2			-140.17(18)	E91			W. Nörtershäuser et al., Phys. Rev. Lett. 102, 062503 (2009)	https://doi.org/10.1103/PhysRevLett.102.062503
¹¹Be⁺	2s_1/2			-2677.4(8)	E91			W. Nörtershäuser et al., Phys. Rev. Lett. 102, 062503 (2009)	https://doi.org/10.1103/PhysRevLett.102.062503
	2p_1/2			-505.4(5)	E91			W. Nörtershäuser et al., Phys. Rev. Lett. 102, 062503 (2009)	https://doi.org/10.1103/PhysRevLett.102.062503

State	Property	Theory	Experiment

Initial	Final	Transition	Wavelength (nm)	Matrix element	Units	Transition rate (s ^-1)	Branching ratio