It's Elemental
Isotopes of the Element Plutonium
Plutonium
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 Number | Half-life | Decay Mode | Branching Percentage |
| 228 | 1.1 seconds | Alpha Decay | 100.00% |
| 229 | 67 seconds | Electron Capture | 50.00% |
| Alpha Decay | 50.00% | ||
| Spontaneous Fission | < 7.00% | ||
| 230 | 102 seconds | Alpha Decay | <= 100.00% |
| 231 | 8.6 minutes | Electron Capture | <= 99.80% |
| Alpha Decay | > 0.20% | ||
| 232 | 33.8 minutes | Electron Capture | 90.00% |
| Alpha Decay | 10.00% | ||
| 233 | 20.9 minutes | Electron Capture | 99.88% |
| Alpha Decay | 0.12% | ||
| 234 | 8.8 hours | Electron Capture | ~ 94.00% |
| Alpha Decay | ~ 6.00% | ||
| 235 | 25.3 minutes | Electron Capture | 100.00% |
| Alpha Decay | 2.8×10-3 % | ||
| 236 | 2.858 years | Alpha Decay | 100.00% |
| Spontaneous Fission | 1.9×10-7 % | ||
| 237 | 45.64 days | Electron Capture | 100.00% |
| Alpha Decay | 4.2×10-3 % | ||
| 237m | 0.18 seconds | Isomeric Transition | No Data Available |
| 238 | 87.7 years | Alpha Decay | 100.00% |
| Spontaneous Fission | 1.9×10-7 % | ||
| 239 | 24110 years | Alpha Decay | 100.00% |
| Spontaneous Fission | 3×10-10 % | ||
| 240 | 6561 years | Alpha Decay | 100.00% |
| Spontaneous Fission | 5.7×10-6 % | ||
| 241 | 14.325 years | Beta-minus Decay | 100.00% |
| Alpha Decay | 2.5×10-3 % | ||
| Spontaneous Fission | < 2×10-14 % | ||
| 242 | 3.75×10+5 years | Alpha Decay | 100.00% |
| Spontaneous Fission | 5.5×10-4 % | ||
| 243 | 4.956 hours | Beta-minus Decay | 100.00% |
| 244 | 8.00×10+7 years | Alpha Decay | 99.88% |
| Spontaneous Fission | 0.12% | ||
| 245 | 10.5 hours | Beta-minus Decay | 100.00% |
| 246 | 10.84 days | Beta-minus Decay | 100.00% |
| 247 | 2.27 days | Beta-minus Decay | 100.00% |
Citation and linking information
For questions about this page, please contact Carol McKisson.