Isotopes of germanium
List of isotopes
Bold for isotopes with half-lives longer than the age of the universe (nearly stable) Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes Used to generate ⁶⁸Ga Primordial radionuclide

Isotopes of germanium

Section Title: List of isotopes
Table Section Text: Bold for isotopes with half-lives longer than the age of the universe (nearly stable) Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes Used to generate ⁶⁸Ga Primordial radionuclide

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	decay mode(s)	daughter isotope(s)	nuclear spin and parity	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)

excitation energy

58Ge	32	26	57.99101(34)#	2p	56Zn	0+

59Ge	32	27	58.98175(30)#	2p	57Zn	7/2−#

60Ge	32	28	59.97019(25)#	30# ms	β+	60Ga	0+

2p	58Zn

61Ge	32	29	60.96379(32)#	39(12) ms	β+, p (80%)	60Zn	(3/2−)#

β+ (20%)	61Ga

62Ge	32	30	61.95465(15)#	129(35) ms	β+	62Ga	0+

63Ge	32	31	62.94964(21)#	142(8) ms	β+	63Ga	(3/2−)#

64Ge	32	32	63.94165(3)	63.7(25) s	β+	64Ga	0+

65Ge	32	33	64.93944(11)	30.9(5) s	β+ (99.99%)	65Ga	(3/2)−

β+, p (.01%)	64Zn

66Ge	32	34	65.93384(3)	2.26(5) h	β+	66Ga	0+

67Ge	32	35	66.932734(5)	18.9(3) min	β+	67Ga	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	EC	68Ga	0+

69Ge	32	37	68.9279645(14)	39.05(10) h	β+	69Ga	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	EC	71Ga	1/2−

71mGe	198.367(10) keV	20.40(17) ms	IT	71Ge	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	β−	75As	1/2−

75m1Ge	139.69(3) keV	47.7(5) s	IT (99.97%)	75Ge	7/2+

β−	75As

75m2Ge	192.18(7) keV	216(5) ns	5/2+

76Ge	32	44	75.9214026(18)	1.926(94)×1021 y	β−β−	76Se	0+	0.0783(7)

77Ge	32	45	76.9235486(18)	11.30(1) h	β−	77As	7/2+

77mGe	159.70(10) keV	52.9(6) s	β− (79%)	77As	1/2−

IT (21%)	77Ge

78Ge	32	46	77.922853(4)	88(1) min	β−	78As	0+

79Ge	32	47	78.9254(1)	18.98(3) s	β−	79As	(1/2)−

79mGe	185.95(4) keV	39.0(10) s	β− (96%)	79As	(7/2+)#

IT (4%)	79Ge

80Ge	32	48	79.92537(3)	29.5(4) s	β−	80As	0+

81Ge	32	49	80.92882(13)	7.6(6) s	β−	81As	9/2+#

81mGe	679.13(4) keV	7.6(6) s	β− (99%)	81As	(1/2+)

IT (1%)	81Ge

82Ge	32	50	81.92955(26)	4.55(5) s	β−	82As	0+

83Ge	32	51	82.93462(21)#	1.85(6) s	β−	83As	(5/2+)#

84Ge	32	52	83.93747(32)#	0.947(11) s	β− (89.2%)	84As	0+

β−, n (10.8%)	83As

85Ge	32	53	84.94303(43)#	535(47) ms	β− (86%)	85As	5/2+#

β−, n (14%)	84As

86Ge	32	54	85.94649(54)#	>150 ns	β−, n	85As	0+

β−	86As

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+#

Sentence(s)

In the isotopes of germanium, ⁶⁸Ge is the most stable with a half-life of 270.95 d.

final_sentence: In the isotopes of germanium, ⁶⁸Ge is the most stable with a half-life of 270.95 d.