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 |
| 69 | 60.108% | STABLE |
| 71 | 39.892% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 56 | No Data Available | Proton Emission (suspected) | No Data Available |
| 57 | No Data Available | Proton Emission (suspected) | No Data Available |
| 58 | No Data Available | Proton Emission (suspected) | No Data Available |
| 59 | No Data Available | Proton Emission (suspected) | No Data Available |
| 60 | 70 milliseconds | Electron Capture | 98.40% |
| Electron Capture with delayed Proton Emission | 1.60% | ||
| Electron Capture with delayed Alpha Decay | < 0.02% | ||
| 61 | 167 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | < 0.25% | ||
| 62 | 116.121 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 63 | 32.4 seconds | Electron Capture | 100.00% |
| 64 | 2.627 minutes | Electron Capture | 100.00% |
| 65 | 15.2 minutes | Electron Capture | 100.00% |
| 66 | 9.49 hours | Electron Capture | 100.00% |
| 67 | 3.2617 days | Electron Capture | 100.00% |
| 68 | 67.71 minutes | Electron Capture | 100.00% |
| 69 | STABLE | - | - |
| 70 | 21.14 minutes | Beta-minus Decay | 99.59% |
| Electron Capture | 0.41% | ||
| 71 | STABLE | - | - |
| 72 | 14.10 hours | Beta-minus Decay | 100.00% |
| 73 | 4.86 hours | Beta-minus Decay | 100.00% |
| 74 | 8.12 minutes | Beta-minus Decay | 100.00% |
| 74m | 9.5 seconds | Isomeric Transition | 75.00% |
| Beta-minus Decay | < 50.00% | ||
| 75 | 126 seconds | Beta-minus Decay | 100.00% |
| 76 | 32.6 seconds | Beta-minus Decay | 100.00% |
| 77 | 13.2 seconds | Beta-minus Decay | 100.00% |
| 78 | 5.09 seconds | Beta-minus Decay | 100.00% |
| 79 | 2.847 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.09% | ||
| 80 | 1.676 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.86% | ||
| 81 | 1.217 seconds | Beta-minus Decay with delayed Neutron Emission | 11.90% |
| Beta-minus Decay | 100.00% | ||
| 82 | 0.599 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 19.80% | ||
| 83 | 308.1 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 62.80% | ||
| 84 | 0.085 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 74.00% | ||
| 84m | < 0.085 seconds | Beta-minus Decay | 100.00% |
| 84m1 | 0.085 seconds | Beta-minus Decay with delayed Neutron Emission (suspected) | No Data Available |
| 85 | < 100 milliseconds | Beta-minus Decay with delayed Neutron Emission | > 35.0% |
| Beta-minus Decay | No Data Available | ||
| 86 | > 150 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 87 | > 634 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| Beta-minus Decay with delayed Double Neutron Emission | No Data Available |
This page is maintained by Steve Gagnon.