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Neptunium

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The Periodic Table of Elements

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Isotopes of the Element Plutonium

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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
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%