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 |
| 31 | 100% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 24 | No Data Available | Electron Capture (suspected) | No Data Available |
| Proton Emission (suspected) | No Data Available | ||
| 25 | < 30 nanoseconds | Proton Emission | 100.00% |
| 26 | 43.7 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 27 | 260 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.07% | ||
| 28 | 270.3 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 1.3×10-3 % | ||
| Electron Capture with delayed Alpha Decay | 8.6×10-4 % | ||
| 29 | 4.142 seconds | Electron Capture | 100.00% |
| 30 | 2.498 minutes | Electron Capture | 100.00% |
| 31 | STABLE | - | - |
| 32 | 14.262 days | Beta-minus Decay | 100.00% |
| 33 | 25.35 days | Beta-minus Decay | 100.00% |
| 34 | 12.43 seconds | Beta-minus Decay | 100.00% |
| 35 | 47.3 seconds | Beta-minus Decay | 100.00% |
| 36 | 5.6 seconds | Beta-minus Decay | 100.00% |
| 37 | 2.31 seconds | Beta-minus Decay | 100.00% |
| 38 | 0.64 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 12.00% | ||
| 39 | 0.28 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 26.00% | ||
| 40 | 125 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 15.80% | ||
| 41 | 100 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 30.00% | ||
| 42 | 48.5 milliseconds | Beta-minus Decay with delayed Neutron Emission | 50.00% |
| Beta-minus Decay | 100.00% | ||
| 43 | 36.5 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 100.00% | ||
| 44 | 18.5 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 45 | > 200 nanoseconds | Beta-minus Decay | No Data Available |
| 46 | > 200 nanoseconds | Beta-minus Decay | 100.00% |
| 47 | No Data Available | No Data Available | No Data Available |
This page is maintained by Steve Gagnon.