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Isotopes of the Element Berkelium

[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

Berkelium has no naturally occurring isotopes.

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
2341.4×102 secondsAlpha Decay>= 80.00%
Electron Capture<= 20.00%
235No Data AvailableElectron Capture (suspected)No Data Available
Alpha Decay (suspected)No Data Available
236No Data AvailableNo Data AvailableNo Data Available
2371 minutesAlpha Decay (suspected)No Data Available
Electron Capture (suspected)No Data Available
238144 secondsElectron Capture100.00%
Electron Capture with
delayed Spontaneous Fission
0.048%
239No Data AvailableElectron Capture> 99.00%
Alpha Decay< 1.00%
Spontaneous Fission< 1.00%
2404.8 minutesElectron CaptureNo Data Available
Electron Capture with
delayed Spontaneous Fission
2.0×10-3 %
2414.6 minutesAlpha DecayNo Data Available
Electron CaptureNo Data Available
2427.0 minutesElectron Capture<= 100.00%
2434.5 hoursElectron Capture~ 99.85%
Alpha Decay~ 0.15%
2444.35 hoursElectron Capture99.99%
Alpha Decay6.0×10-3 %
2454.95 daysElectron Capture99.88%
Alpha Decay0.12%
2461.80 daysElectron Capture100.00%
2471380 yearsAlpha Decay<= 100.00%
248> 9 yearsAlpha DecayNo Data Available
248m23.7 hoursElectron Capture30.00%
Beta-minus Decay70.00%
249330 daysBeta-minus Decay100.00%
Alpha Decay1.4×10-3 %
Spontaneous Fission4.7×10-8 %
2503.212 hoursBeta-minus Decay100.00%
25155.6 minutesBeta-minus Decay100.00%
252No Data AvailableNo Data AvailableNo Data Available
253No Data AvailableBeta-minus Decay (suspected)No Data Available
254No Data AvailableNo Data AvailableNo Data Available