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 |
| 23 | 100% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 18 | 1.3×10-21 seconds | Proton Emission | 100.00% |
| 19 | < 40 nanoseconds | Proton Emission | No Data Available |
| 20 | 447.9 milliseconds | Electron Capture with delayed Alpha Decay | 20.05% |
| Electron Capture | 100.00% | ||
| 21 | 22.49 seconds | Electron Capture | 100.00% |
| 22 | 2.6027 years | Electron Capture | 100.00% |
| 23 | STABLE | - | - |
| 24 | 14.997 hours | Beta-minus Decay | 100.00% |
| 24m | 20.18 milliseconds | Isomeric Transition | 99.95% |
| Beta-minus Decay | ~ 0.05% | ||
| 25 | 59.1 seconds | Beta-minus Decay | 100.00% |
| 26 | 1.07128 seconds | Beta-minus Decay | 100.00% |
| 27 | 301 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.13% | ||
| 28 | 30.5 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.58% | ||
| 29 | 44.9 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 21.50% | ||
| 30 | 48 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 30.00% | ||
| Beta-minus Decay with delayed Double Neutron Emission | 1.15% | ||
| Beta-minus Decay with delayed Alpha Decay | 5.5×10-5 % | ||
| 31 | 17.0 milliseconds | Beta-minus Decay with delayed Double Neutron Emission | 0.87% |
| Beta-minus Decay with delayed Triple Neutron Emission | < 0.05% | ||
| Beta-minus Decay | 100.00% | ||
| Beta-minus Decay with delayed Neutron Emission | 37.00% | ||
| 32 | 13.2 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 24.00% | ||
| Beta-minus Decay with delayed Double Neutron Emission | 8.00% | ||
| 33 | 8.0 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 47.00% | ||
| Beta-minus Decay with delayed Double Neutron Emission | 13.00% | ||
| 34 | 5.5 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Double Neutron Emission | ~ 50.00% | ||
| Beta-minus Decay with delayed Neutron Emission | ~ 15.00% | ||
| 35 | 1.5 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 36 | < 180 nanoseconds | Neutron Emission | No Data Available |
| 37 | > 60 nanoseconds | Beta-minus Decay with delayed Neutron Emission | No Data Available |
| Beta-minus Decay | No Data Available |
This page is maintained by Steve Gagnon.