Isotopes of the Element Arsenic
[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 Arsenic with a Known Natural Abundance

Mass Number	Natural Abundance	Half-life

75	100%	Stable

All Known Isotopes of the Element Arsenic

Mass Number	Half-life	Decay Mode	Branching Percentage

60	No Data Available	Proton Emission	No Data Available

61	No Data Available	Proton Emission	No Data Available

62	No Data Available	Proton Emission	No Data Available

63	No Data Available	Proton Emission	No Data Available

64	> 1.2 microseconds	Electron Capture	No Data Available

65	0.19 seconds	Electron Capture	100.00

66	95.77 milliseconds	Electron Capture	100.00

67	42.5 seconds	Electron Capture	100.00

68	151.6 seconds	Electron Capture	100.00

69	15.2 minutes	Electron Capture	100.00

70	52.6 minutes	Electron Capture	100.00

71	65.28 hours	Electron Capture	100.00

72	26.0 hours	Electron Capture	100.00

73	80.30 days	Electron Capture	100.00

74	17.77 days	Electron Capture	66.00

		Beta-minus Decay	34.00

75	Stable	-	-

76	1.0778 days	Beta-minus Decay	100.00

77	38.83 hours	Beta-minus Decay	100.00

78	90.7 minutes	Beta-minus Decay	100.00

79	9.01 minutes	Beta-minus Decay	100.00

79_m	0.87 microseconds	Isomeric Transition	100.00

80	15.2 seconds	Beta-minus Decay	100.00

81	33.3 seconds	Beta-minus Decay	100.00

82	19.1 seconds	Beta-minus Decay	100.00

82_m	13.6 seconds	Beta-minus Decay	100.00

83	13.4 seconds	Beta-minus Decay	100.00

84	3.24 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	0.28

85	2.021 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	59.40

86	0.945 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	33.00

87	0.56 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	15.40

88	> 150 nanoseconds	Beta-minus Decay	No Data Available

		Beta-minus Decay with delayed Neutron Emission	No Data Available

89	No Data Available	Beta-minus Decay	No Data Available

90	> 150 nanoseconds	Beta-minus Decay	No Data Available

91	> 150 nanoseconds	Beta-minus Decay	No Data Available

92	No Data Available	Beta-minus Decay	100.00

This page is maintained by Steve Gagnon.

Citation and linking information

Isotopes of the Element Arsenic[Click for Main Data]

Isotopes of the Element Arsenic
[Click for Main Data]