Isotopes of the Element Iron
[Click for Main Data]

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 Iron with a Known Natural Abundance

All Known Isotopes of the Element Iron

Mass Number	Half-life	Decay Mode	Branching Percentage

45	> 350 nanoseconds	Proton Emission	No Data Available

		Double Proton Emission	No Data Available

46	20 milliseconds	No Data Available	No Data Available

47	27 milliseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	No Data Available

48	44 milliseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	3.60

49	70 milliseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	>= 52.00

50	155 milliseconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	~ 0.00

51	305 milliseconds	Electron Capture	100.00

52	8.275 hours	Electron Capture	100.00

52_m	45.9 seconds	Electron Capture	100.00

53	8.51 minutes	Electron Capture	100.00

53_m	2.526 minutes	Isomeric Transition	100.00

54	> 3.1×10⁺²² years	Double Electron Capture	No Data Available

55	2.737 years	Electron Capture	100.00

56	Stable	-	-

57	Stable	-	-

58	Stable	-	-

59	44.495 days	Beta-minus Decay	100.00

60	1.5×10⁺⁶ years	Beta-minus Decay	100.00

61	5.98 minutes	Beta-minus Decay	100.00

62	68 seconds	Beta-minus Decay	100.00

63	6.1 seconds	Beta-minus Decay	100.00

64	2.0 seconds	Beta-minus Decay	100.00

65	0.4 seconds	Beta-minus Decay	100.00

66	0.44 seconds	Beta-minus Decay	100.00

67	0.47 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	1.13

68	0.10 seconds	Beta-minus Decay	100.00

69	0.17 seconds	Beta-minus Decay	100.00

70	> 150 nanoseconds	Beta-minus Decay	No Data Available

71	> 150 nanoseconds	Beta-minus Decay	No Data Available

72	> 150 nanoseconds	Beta-minus Decay	No Data Available

This page is maintained by Steve Gagnon.

Isotopes of the Element Iron[Click for Main Data]