Most of the isotope data on this site has been obtained from the National Nuclear Data Center.
Naturally Occurring Isotopes
| 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 |
This page is maintained by Steve Gagnon.