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Isotopes of germanium

Germanium (Ge)
Standard atomic mass: 72.64(1) u

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Table

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
nuclide symbol	excitation energy			half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
⁵⁸Ge	32	26	57.99101(34)#		0+
⁵⁹Ge	32	27	58.98175(30)#		7/2-#
⁶⁰Ge	32	28	59.97019(25)#	30# ms	0+
⁶¹Ge	32	29	60.96379(32)#	39(12) ms	(3/2-)#
⁶²Ge	32	30	61.95465(15)#	129(35) ms	0+
⁶³Ge	32	31	62.94964(21)#	142(8) ms	(3/2-)#
⁶⁴Ge	32	32	63.94165(3)	63.7(25) s	0+
⁶⁵Ge	32	33	64.93944(11)	30.9(5) s	(3/2)-
⁶⁶Ge	32	34	65.93384(3)	2.26(5) h	0+
⁶⁷Ge	32	35	66.932734(5)	18.9(3) min	1/2-
^67m1Ge	18.20(5) keV			13.7(9) µs	5/2-
^67m2Ge	751.70(6) keV			110.9(14) ns	9/2+
⁶⁸Ge	32	36	67.928094(7)	270.95(16) d	0+
⁶⁹Ge	32	37	68.9279645(14)	39.05(10) h	5/2-
^69m1Ge	86.765(14) keV			5.1(2) µs	1/2-
^69m2Ge	397.944(18) keV			2.81(5) µs	9/2+
⁷⁰Ge	32	38	69.9242474(11)	STABLE	0+	0.2038(18)
⁷¹Ge	32	39	70.9249510(11)	11.43(3) d	1/2-
^71mGe	198.367(10) keV			20.40(17) ms	9/2+
⁷²Ge	32	40	71.9220758(18)	STABLE	0+	0.2731(26)
^72mGe	691.43(4) keV			444.2(8) ns	0+
⁷³Ge	32	41	72.9234589(18)	STABLE	9/2+	0.0776(8)
^73m1Ge	13.2845(15) keV			2.92(3) µs	5/2+
^73m2Ge	66.726(9) keV			499(11) ms	1/2-
⁷⁴Ge	32	42	73.9211778(18)	STABLE	0+	0.3672(15)
⁷⁵Ge	32	43	74.9228589(18)	82.78(4) min	1/2-
^75m1Ge	139.69(3) keV			47.7(5) s	7/2+
^75m2Ge	192.18(7) keV			216(5) ns	5/2+
⁷⁶Ge	32	44	75.9214026(18)	1.78(8)E+21 a	0+	0.0783(7)
⁷⁷Ge	32	45	76.9235486(18)	11.30(1) h	7/2+
^77mGe	159.70(10) keV			52.9(6) s	1/2-
⁷⁸Ge	32	46	77.922853(4)	88(1) min	0+
⁷⁹Ge	32	47	78.9254(1)	18.98(3) s	(1/2)-
^79mGe	185.95(4) keV			39.0(10) s	(7/2+)#
⁸⁰Ge	32	48	79.92537(3)	29.5(4) s	0+
⁸¹Ge	32	49	80.92882(13)	7.6(6) s	9/2+#
^81mGe	679.13(4) keV			7.6(6) s	(1/2+)
⁸²Ge	32	50	81.92955(26)	4.55(5) s	0+
⁸³Ge	32	51	82.93462(21)#	1.85(6) s	(5/2+)#
⁸⁴Ge	32	52	83.93747(32)#	0.947(11) s	0+
⁸⁵Ge	32	53	84.94303(43)#	535(47) ms	5/2+#
⁸⁶Ge	32	54	85.94649(54)#	>150 ns	0+
⁸⁷Ge	32	55	86.95251(54)#	0.14# s	5/2+#
⁸⁸Ge	32	56	87.95691(75)#	>=300 ns	0+
⁸⁹Ge	32	57	88.96383(97)#	>150 ns	3/2+#

Notes

Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.

References

Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.3 database (retrieved Aug. 2007).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.

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Categories: Isotopes | Germanium

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