It's Elemental - Isotopes of the Element Niobium

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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 Niobium with a Known Natural Abundance

Mass Number	Natural Abundance	Half-life

93	100%	Stable

All Known Isotopes of the Element Niobium

Mass Number	Half-life	Decay Mode	Branching Percentage

81	≈ 0.8 seconds	Electron Capture	No Data Available

		Electron Capture with delayed Proton Emission	No Data Available

		Proton Emission	No Data Available

82	50 milliseconds	Electron Capture	No Data Available

83	4.1 seconds	Electron Capture	100.00

84	12 seconds	Electron Capture	100.00

		Electron Capture with delayed Proton Emission	No Data Available

85	20.9 seconds	Electron Capture	100.00

86	56 seconds	Electron Capture	No Data Available

86_m	88 seconds	Electron Capture	100.00

87	3.75 minutes	Electron Capture	100.00

87_m	2.6 minutes	Electron Capture	No Data Available

88	14.5 minutes	Electron Capture	100.00

88_m	7.8 minutes	Electron Capture	100.00

89	2.03 hours	Electron Capture	100.00

89_m	66 minutes	Electron Capture	100.00

90	14.60 hours	Electron Capture	100.00

90_m	18.81 seconds	Isomeric Transition	100.00

91	6.8×10⁺² years	Electron Capture	100.00

91_m	60.86 days	Isomeric Transition	96.60

		Electron Capture	3.40

92	3.47×10⁺⁷ years	Electron Capture	100.00

		Beta-minus Decay	< 0.05

92_m	10.15 days	Electron Capture	100.00

93	Stable	-	-

93_m	16.13 years	Isomeric Transition	100.00

94	2.03×10⁺⁴ years	Beta-minus Decay	100.00

94_m	6.263 minutes	Isomeric Transition	99.50

		Beta-minus Decay	0.50

95	34.991 days	Beta-minus Decay	100.00

95_m	3.61 days	Isomeric Transition	94.40

		Beta-minus Decay	5.60

96	23.35 hours	Beta-minus Decay	100.00

97	72.1 minutes	Beta-minus Decay	100.00

97_m	58.7 seconds	Isomeric Transition	100.00

98	2.86 seconds	Beta-minus Decay	100.00

98_m	51.3 minutes	Beta-minus Decay	99.90

		Isomeric Transition	< 0.20

99	15.0 seconds	Beta-minus Decay	100.00

99_m	2.6 minutes	Beta-minus Decay	> 96.20

		Isomeric Transition	< 3.80

100	1.5 seconds	Beta-minus Decay	100.00

100_m	2.99 seconds	Beta-minus Decay	100.00

101	7.1 seconds	Beta-minus Decay	100.00

102	1.3 seconds	Beta-minus Decay	No Data Available

102_m	4.3 seconds	Beta-minus Decay	No Data Available

103	1.5 seconds	Beta-minus Decay	100.00

104	4.9 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	0.06

104_m	0.94 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	0.05

105	2.95 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	1.70

106	1.02 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	4.50

107	330 milliseconds	Beta-minus Decay	100.00

108	0.193 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	6.20

109	0.19 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	31.00

110	0.17 seconds	Beta-minus Decay	100.00

		Beta-minus Decay with delayed Neutron Emission	40.00

111	> 150 nanoseconds	Beta-minus Decay	No Data Available

112	> 150 nanoseconds	Beta-minus Decay	No Data Available

113	> 150 nanoseconds	Beta-minus Decay	No Data Available