It's Elemental - Isotopes of the Element Cobalt

Previous Element	Table of Elements	Next Element

	[Return to Cobalt's Data Page]

Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.

Isotopes of the Element Cobalt with a Known Natural Abundance

Mass Number	Natural Abundance	Half-life

59	100%	Stable

All Known Isotopes of the Element Cobalt

Mass Number	Half-life	Decay Mode	Branching Percentage

48	No Data Available	Proton Emission	No Data Available

49	< 35 nanoseconds	Electron Capture	No Data Available

		Proton Emission	No Data Available

50	44 milliseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	54.00

51	> 200 nanoseconds	Electron Capture	No Data Available

52	115 milliseconds	Electron Capture	100.00

53	240 milliseconds	Electron Capture	100.00

53_m	247 milliseconds	Electron Capture	~ 98.50

		Proton Emission	~ 1.50

54	193.23 milliseconds	Electron Capture	100.00

54_m	1.48 minutes	Electron Capture	100.00

55	17.53 hours	Electron Capture	100.00

56	77.233 days	Electron Capture	100.00

57	271.74 days	Electron Capture	100.00

58	70.86 days	Electron Capture	100.00

58_m	9.04 hours	Isomeric Transition	100.00

59	Stable	-	-

60	1925.3 days	Beta-minus Decay	100.00

60_m	10.467 minutes	Isomeric Transition	99.76

		Beta-minus Decay	0.24

61	1.650 hours	Beta-minus Decay	100.00

62	1.50 minutes	Beta-minus Decay	100.00

62_m	13.91 minutes	Beta-minus Decay	> 99.00

		Isomeric Transition	< 1.00

63	27.4 seconds	Beta-minus Decay	100.00

64	0.30 seconds	Beta-minus Decay	100.00

65	1.20 seconds	Beta-minus Decay	100.00

66	0.233 seconds	Beta-minus Decay	100.00

67	0.425 seconds	Beta-minus Decay	100.00

68	0.18 seconds	Beta-minus Decay	100.00

69	0.27 seconds	Beta-minus Decay	100.00

70	0.15 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	2.51

71	0.21 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	2.61

72	0.09 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	4.80

73	> 150 nanoseconds	Beta-minus Decay	No Data Available

74	> 150 nanoseconds	Beta-minus Decay	No Data Available

75	> 150 nanoseconds	Beta-minus Decay	100.00