It's Elemental
Isotopes of the Element Aluminum
Aluminum
Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.
Isotopes With A Known Natural Abundance
| Mass Number | Natural Abundance | Half-life |
| 27 | 100% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 21 | < 35 nanoseconds | Proton Emission | No Data Available |
| 22 | 91.1 milliseconds | Electron Capture with delayed Alpha Decay | 0.04% |
| Electron Capture | 100.00% | ||
| Electron Capture with delayed Proton Emission | 54.50% | ||
| Electron Capture with delayed Double Proton Emission | 1.10% | ||
| 23 | 446 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 1.22% | ||
| 24 | 2.053 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 1.6×10-3 % | ||
| Electron Capture with delayed Alpha Decay | 0.04% | ||
| 24m | 130 milliseconds | Isomeric Transition | 82.50% |
| Electron Capture | 17.50% | ||
| Electron Capture with delayed Alpha Decay | 0.03% | ||
| 25 | 7.183 seconds | Electron Capture | 100.00% |
| 26 | 7.17×10+5 years | Electron Capture | 100.00% |
| 26m | 6.3464 seconds | Electron Capture | 100.00% |
| 27 | STABLE | - | - |
| 28 | 2.2414 minutes | Beta-minus Decay | 100.00% |
| 29 | 6.56 minutes | Beta-minus Decay | 100.00% |
| 30 | 3.62 seconds | Beta-minus Decay | 100.00% |
| 31 | 644 milliseconds | Beta-minus Decay | 100.00% |
| 32 | 33.0 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.70% | ||
| 33 | 41.7 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 8.50% | ||
| 34 | 42 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 27.00% | ||
| 35 | 37.2 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 38.00% | ||
| 36 | 90 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | < 31.00% | ||
| 37 | 10.7 milliseconds | Beta-minus Decay | 100.00% |
| 38 | 7.6 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 39 | 7.6 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 40 | > 260 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 41 | > 260 nanoseconds | Beta-minus Decay | No Data Available |
| 42 | > 170 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 43 | > 170 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.