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Isotopes of the Element Dubnium

[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.

Naturally Occurring Isotopes

Dubnium has no naturally occurring isotopes.

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
2551.6 secondsAlpha Decay80.00%
Spontaneous Fission~ 20.00%
2561.9 secondsAlpha Decay~ 70.00%
Electron Capture~ 30.00%
Spontaneous Fission~ 0.02%
2571.82 secondsAlpha Decay94.00%
Spontaneous Fission~ 6.00%
257m0.58 secondsAlpha Decay100.00%
Spontaneous FissionNo Data Available
2584.2 secondsSpontaneous Fission< 1.00%
Alpha Decay65.00%
Electron Capture35.00%
258m20 secondsElectron Capture100.00%
2590.51 secondsAlpha DecayNo Data Available
2601.52 secondsAlpha Decay>= 90.40%
Spontaneous Fission<= 9.60%
Electron Capture< 2.50%
2611.8 secondsAlpha Decay>= 82.00%
Spontaneous Fission<= 18.00%
26235 secondsAlpha Decay~ 67.00%
Spontaneous FissionNo Data Available
26327 secondsSpontaneous Fission55.00%
Alpha Decay41.00%
Electron Capture3.00%
264No Data AvailableAlpha Decay (suspected)No Data Available
265No Data AvailableAlpha Decay (suspected)No Data Available
266No Data AvailableAlpha Decay (suspected)No Data Available
Spontaneous Fission (suspected)No Data Available
26773 minutesSpontaneous Fission100.00%
26832 hoursSpontaneous Fission100.00%
269No Data AvailableAlpha Decay (suspected)No Data Available
Spontaneous Fission (suspected)No Data Available
27023 hoursSpontaneous Fission100.00%
Alpha DecayNo Data Available