It's Elemental


Previous Element


The Periodic Table of Elements

Next Element



Isotopes of the Element Californium

[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
2370.8 secondsSpontaneous Fission70.00%
Alpha Decay30.00%
23821 millisecondsSpontaneous Fission100.00%
23939 secondsElectron CaptureNo Data Available
Alpha DecayNo Data Available
24064 secondsAlpha Decay98.50%
Spontaneous Fission1.50%
2413.78 minutesElectron Capture~ 75.00%
Alpha Decay~ 25.00%
2423.7 minutesAlpha Decay80.00%
Electron Capture20.00%
Spontaneous Fission<= 0.01%
24310.7 minutesAlpha Decay~ 14.00%
Electron Capture~ 86.00%
24419.4 minutesAlpha Decay<= 100.00%
24545.0 minutesElectron Capture64.70%
Alpha Decay35.30%
24635.7 hoursAlpha Decay100.00%
Electron Capture< 4.0×10-3 %
Spontaneous Fission2.4×10-4 %
246m45 nanosecondsSpontaneous Fission<= 100.00%
2473.11 hoursElectron Capture99.97%
Alpha Decay0.04%
248333.5 daysAlpha Decay100.00%
Spontaneous Fission2.9×10-3 %
249351 yearsAlpha Decay100.00%
Spontaneous Fission5.0×10-7 %
25013.08 yearsAlpha Decay99.92%
Spontaneous Fission0.08%
251898 yearsAlpha Decay100.00%
Spontaneous FissionNo Data Available
2522.645 yearsAlpha Decay96.91%
Spontaneous Fission3.09%
25317.81 daysAlpha Decay0.31%
Beta-minus Decay99.69%
25460.5 daysSpontaneous Fission99.69%
Alpha Decay0.31%
25585 minutesBeta-minus Decay100.00%
25612.3 minutesSpontaneous Fission100.00%
Beta-minus Decay< 1.00%
Alpha Decay~ 1.0×10-6 %