It's Elemental
Isotopes of the Element Curium
Curium
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 |
| 233 | 23 seconds | Electron Capture | 80.00% |
| Alpha Decay | 20.00% | ||
| 234 | 51 seconds | Alpha Decay | ~ 40.00% |
| Spontaneous Fission | ~ 40.00% | ||
| Electron Capture | ~ 20.00% | ||
| 235 | No Data Available | Alpha Decay (suspected) | No Data Available |
| Electron Capture (suspected) | No Data Available | ||
| 236 | No Data Available | Electron Capture | No Data Available |
| Alpha Decay | No Data Available | ||
| 237 | No Data Available | Electron Capture | 100.00% |
| Alpha Decay | < 1.00% | ||
| 238 | 2.4 hours | Electron Capture | >= 90.00% |
| Alpha Decay | <= 10.00% | ||
| 239 | ≈ 2.9 hours | Electron Capture | 100.00% |
| Alpha Decay | < 0.10% | ||
| 240 | 27 days | Alpha Decay | > 99.50% |
| Electron Capture | < 0.50% | ||
| Spontaneous Fission | 3.9×10-6 % | ||
| 241 | 32.8 days | Electron Capture | 99.00% |
| Alpha Decay | 1.00% | ||
| 242 | 162.8 days | Alpha Decay | 100.00% |
| Spontaneous Fission | 6.2×10-6 % | ||
| Emission of a silicon-34 nucleus | 1×10-14 % | ||
| 243 | 29.1 years | Alpha Decay | 99.71% |
| Electron Capture | 0.29% | ||
| Spontaneous Fission | 5.3×10-9 % | ||
| 244 | 18.1 years | Spontaneous Fission | 1.4×10-4 % |
| Alpha Decay | 100.00% | ||
| 244m | 34 milliseconds | Isomeric Transition | 100.00% |
| 245 | 8423 years | Alpha Decay | 100.00% |
| Spontaneous Fission | 6.1×10-7 % | ||
| 246 | 4706 years | Alpha Decay | 99.97% |
| Spontaneous Fission | 0.03% | ||
| 247 | 1.56×10+7 years | Alpha Decay | 100.00% |
| 248 | 3.48×10+5 years | Alpha Decay | 91.61% |
| Spontaneous Fission | 8.39% | ||
| 249 | 64.15 minutes | Beta-minus Decay | 100.00% |
| 250 | ≈ 8.3×10+3 years | Spontaneous Fission | ~ 74.00% |
| Alpha Decay | ~ 18.00% | ||
| Beta-minus Decay | ~ 8.00% | ||
| 251 | 16.8 minutes | Beta-minus Decay | 100.00% |
| 252 | < 2 days | No Data Available | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.