It's Elemental
Isotopes of the Element Protactinium
Protactinium
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 |
| 212 | 5.1 milliseconds | Alpha Decay | 100.00% |
| 213 | 5.3 milliseconds | Alpha Decay | 100.00% |
| 214 | 17 milliseconds | Alpha Decay | <= 100.00% |
| 215 | 14 milliseconds | Alpha Decay | 100.00% |
| 216 | 0.15 seconds | Alpha Decay | ~ 98.00% |
| Electron Capture | ~ 2.00% | ||
| 217 | 3.6 milliseconds | Alpha Decay | 100.00% |
| 217m | 1.2 milliseconds | Alpha Decay | 73.00% |
| Isomeric Transition | 27.00% | ||
| 218 | 113 microseconds | Alpha Decay | 100.00% |
| 219 | 53 nanoseconds | Alpha Decay | 100.00% |
| 220 | 0.78 microseconds | Alpha Decay | 100.00% |
| Electron Capture | 3.0×10-7 % | ||
| 221 | 5.9 microseconds | Alpha Decay | 100.00% |
| 222 | 2.9 milliseconds | Alpha Decay | 100.00% |
| 223 | 5.1 milliseconds | Alpha Decay | 100.00% |
| 224 | 0.85 seconds | Alpha Decay | 100.00% |
| 225 | 1.7 seconds | Alpha Decay | 100.00% |
| 226 | 1.8 minutes | Alpha Decay | 74.00% |
| Electron Capture | 26.00% | ||
| 227 | 38.3 minutes | Alpha Decay | 85.00% |
| Electron Capture | 15.00% | ||
| 228 | 22.4 hours | Electron Capture | 98.15% |
| Alpha Decay | 1.85% | ||
| 229 | 1.50 days | Electron Capture | 99.52% |
| Alpha Decay | 0.48% | ||
| 230 | 17.4 days | Electron Capture | 92.20% |
| Beta-minus Decay | 7.80% | ||
| Alpha Decay | 3.2×10-3 % | ||
| 231 | 3.276×10+4 years | Alpha Decay | 100.00% |
| Spontaneous Fission | <= 2×10-11 % | ||
| 232 | 1.32 days | Beta-minus Decay | 100.00% |
| Electron Capture | No Data Available | ||
| 233 | 26.975 days | Beta-minus Decay | 100.00% |
| 234 | 6.70 hours | Beta-minus Decay | 100.00% |
| 234m | 1.159 minutes | Beta-minus Decay | 99.84% |
| Isomeric Transition | 0.16% | ||
| 235 | 24.44 minutes | Beta-minus Decay | 100.00% |
| 236 | 9.1 minutes | Beta-minus Decay | 100.00% |
| 237 | 8.7 minutes | Beta-minus Decay | 100.00% |
| 238 | 2.27 minutes | Beta-minus Decay | 100.00% |
| 239 | 1.8 hours | Beta-minus Decay | 100.00% |
| 240 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 241 | No Data Available | No Data Available | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.