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Isotopes of the Element Curium

[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.

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
23323 secondsElectron Capture80.00%
Alpha Decay20.00%
23451 secondsAlpha Decay~ 40.00%
Spontaneous Fission~ 40.00%
Electron Capture~ 20.00%
235No Data AvailableAlpha Decay (suspected)No Data Available
Electron Capture (suspected)No Data Available
236No Data AvailableElectron CaptureNo Data Available
Alpha DecayNo Data Available
237No Data AvailableElectron Capture100.00%
Alpha Decay< 1.00%
2382.4 hoursElectron Capture>= 90.00%
Alpha Decay<= 10.00%
239≈ 2.9 hoursElectron Capture100.00%
Alpha Decay< 0.10%
24027 daysAlpha Decay> 99.50%
Electron Capture< 0.50%
Spontaneous Fission3.9×10-6 %
24132.8 daysElectron Capture99.00%
Alpha Decay1.00%
242162.8 daysAlpha Decay100.00%
Spontaneous Fission6.2×10-6 %
Emission of a silicon-34 nucleus1×10-14 %
24329.1 yearsAlpha Decay99.71%
Electron Capture0.29%
Spontaneous Fission5.3×10-9 %
24418.1 yearsSpontaneous Fission1.4×10-4 %
Alpha Decay100.00%
244m34 millisecondsIsomeric Transition100.00%
2458423 yearsAlpha Decay100.00%
Spontaneous Fission6.1×10-7 %
2464706 yearsAlpha Decay99.97%
Spontaneous Fission0.03%
2471.56×10+7 yearsAlpha Decay100.00%
2483.48×10+5 yearsAlpha Decay91.61%
Spontaneous Fission8.39%
24964.15 minutesBeta-minus Decay100.00%
250≈ 8.3×10+3 yearsSpontaneous Fission~ 74.00%
Alpha Decay~ 18.00%
Beta-minus Decay~ 8.00%
25116.8 minutesBeta-minus Decay100.00%
252< 2 daysNo Data AvailableNo Data Available