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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.

Naturally Occurring Isotopes

Mass NumberNatural AbundanceHalf-life
93100%STABLE

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
81< 200 nanosecondsElectron CaptureNo Data Available
8250 millisecondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
833.8 secondsElectron Capture100.00%
849.8 secondsElectron Capture100.00%
Electron Capture with
delayed Proton Emission
No Data Available
8520.5 secondsElectron Capture100.00%
85m12 secondsElectron CaptureNo Data Available
Isomeric TransitionNo Data Available
85m13.3 secondsIsomeric TransitionNo Data Available
Electron CaptureNo Data Available
8688 secondsElectron Capture100.00%
873.75 minutesElectron Capture100.00%
87m2.6 minutesElectron CaptureNo Data Available
8814.55 minutesElectron Capture100.00%
88m7.78 minutesElectron Capture100.00%
892.03 hoursElectron Capture100.00%
89m66 minutesElectron Capture100.00%
9014.60 hoursElectron Capture100.00%
90m18.81 secondsIsomeric Transition100.00%
916.8×10+2 yearsElectron Capture100.00%
91m60.86 daysIsomeric Transition96.60%
Electron Capture3.40%
923.47×10+7 yearsElectron Capture100.00%
Beta-minus Decay< 0.05%
92m10.15 daysElectron Capture100.00%
93STABLE--
93m16.12 yearsIsomeric Transition100.00%
942.03×10+4 yearsBeta-minus Decay100.00%
94m6.263 minutesIsomeric Transition99.50%
Beta-minus Decay0.50%
9534.991 daysBeta-minus Decay100.00%
95m3.61 daysIsomeric Transition94.40%
Beta-minus Decay5.60%
9623.35 hoursBeta-minus Decay100.00%
9772.1 minutesBeta-minus Decay100.00%
97m58.7 secondsIsomeric Transition100.00%
982.86 secondsBeta-minus Decay100.00%
98m51.3 minutesBeta-minus Decay99.90%
Isomeric Transition< 0.20%
9915.0 secondsBeta-minus Decay100.00%
99m2.5 minutesIsomeric Transition< 3.80%
Beta-minus Decay> 96.20%
1001.5 secondsBeta-minus Decay100.00%
100m2.99 secondsBeta-minus Decay100.00%
1017.1 secondsBeta-minus Decay100.00%
1024.3 secondsBeta-minus Decay100.00%
102m1.3 secondsBeta-minus Decay100.00%
1031.5 secondsBeta-minus Decay100.00%
1044.9 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.06%
104m0.94 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
0.05%
1052.95 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
1.70%
1060.93 secondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
4.50%
107300 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
8.00%
108220 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
8.00%
109106 millisecondsBeta-minus Decay100.00%
Beta-minus Decay with
delayed Neutron Emission
< 15.00%
11086 millisecondsBeta-minus Decay with
delayed Neutron Emission
40.00%
Beta-minus Decay100.00%
11151 millisecondsBeta-minus DecayNo Data Available
11233 millisecondsBeta-minus DecayNo Data Available
113> 300 nanosecondsBeta-minus DecayNo Data Available
114> 392 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
Beta-minus Decay with delayed
Double Neutron Emission
No Data Available
115> 394 nanosecondsBeta-minus DecayNo Data Available
Beta-minus Decay with
delayed Neutron Emission
No Data Available
Beta-minus Decay with delayed
Double Neutron Emission
No Data Available