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Neptunium

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Isotopes of the Element Plutonium

[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

Plutonium has no naturally occurring isotopes.

Known Isotopes

Mass NumberHalf-lifeDecay ModeBranching Percentage
2281.1 secondsAlpha Decay100.00%
22967 secondsElectron Capture50.00%
Alpha Decay50.00%
Spontaneous Fission< 7.00%
230102 secondsAlpha Decay<= 100.00%
2318.6 minutesElectron Capture<= 99.80%
Alpha Decay> 0.20%
23233.8 minutesElectron Capture90.00%
Alpha Decay10.00%
23320.9 minutesElectron Capture99.88%
Alpha Decay0.12%
2348.8 hoursElectron Capture~ 94.00%
Alpha Decay~ 6.00%
23525.3 minutesElectron Capture100.00%
Alpha Decay2.8×10-3 %
2362.858 yearsAlpha Decay100.00%
Spontaneous Fission1.9×10-7 %
23745.64 daysElectron Capture100.00%
Alpha Decay4.2×10-3 %
237m0.18 secondsIsomeric TransitionNo Data Available
23887.7 yearsAlpha Decay100.00%
Spontaneous Fission1.9×10-7 %
23924110 yearsAlpha Decay100.00%
Spontaneous Fission3×10-10 %
2406561 yearsAlpha Decay100.00%
Spontaneous Fission5.7×10-6 %
24114.325 yearsBeta-minus Decay100.00%
Alpha Decay2.5×10-3 %
Spontaneous Fission< 2×10-14 %
2423.75×10+5 yearsAlpha Decay100.00%
Spontaneous Fission5.5×10-4 %
2434.956 hoursBeta-minus Decay100.00%
2448.00×10+7 yearsAlpha Decay99.88%
Spontaneous Fission0.12%
24510.5 hoursBeta-minus Decay100.00%
24610.84 daysBeta-minus Decay100.00%
2472.27 daysBeta-minus Decay100.00%