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 |
| 70 | 20.57% | STABLE |
| 72 | 27.45% | STABLE |
| 73 | 7.75% | STABLE |
| 74 | 36.50% | STABLE |
| 76 | 7.73% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 58 | No Data Available | Double Proton Emission (suspected) | No Data Available |
| 59 | No Data Available | Double Proton Emission (suspected) | No Data Available |
| 60 | > 110 nanoseconds | Electron Capture with delayed Proton Emission | No Data Available |
| Electron Capture | No Data Available | ||
| 61 | 44 milliseconds | Electron Capture with delayed Proton Emission | > 58.00% |
| Electron Capture | 100.00% | ||
| 62 | 129 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 63 | 150 milliseconds | Electron Capture | 100.00% |
| 64 | 63.7 seconds | Electron Capture | 100.00% |
| 65 | 30.9 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.01% | ||
| 66 | 2.26 hours | Electron Capture | 100.00% |
| 67 | 18.9 minutes | Electron Capture | 100.00% |
| 68 | 270.95 days | Electron Capture | 100.00% |
| 69 | 39.05 hours | Electron Capture | 100.00% |
| 70 | STABLE | - | - |
| 71 | 11.43 days | Electron Capture | 100.00% |
| 71m | 20.41 milliseconds | Isomeric Transition | 100.00% |
| 72 | STABLE | - | - |
| 73 | STABLE | - | - |
| 73m | 0.499 seconds | Isomeric Transition | 100.00% |
| 74 | STABLE | - | - |
| 75 | 82.78 minutes | Beta-minus Decay | 100.00% |
| 75m | 47.7 seconds | Isomeric Transition | 99.97% |
| Beta-minus Decay | 0.03% | ||
| 76 | STABLE | - | - |
| 77 | 11.30 hours | Beta-minus Decay | 100.00% |
| 77m | 52.9 seconds | Beta-minus Decay | 81.00% |
| Isomeric Transition | 19.00% | ||
| 78 | 88.0 minutes | Beta-minus Decay | 100.00% |
| 79 | 18.98 seconds | Beta-minus Decay | 100.00% |
| 79m | 39.0 seconds | Beta-minus Decay | 96.00% |
| Isomeric Transition | 4.00% | ||
| 80 | 29.5 seconds | Beta-minus Decay | 100.00% |
| 81 | 7.6 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay | 100.00% | ||
| 82 | 4.56 seconds | Beta-minus Decay | 100.00% |
| 83 | 1.85 seconds | Beta-minus Decay | 100.00% |
| 84 | 0.954 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 10.20% | ||
| 85 | 0.56 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 14.00% | ||
| 86 | > 150 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 87 | ≈ 0.14 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 88 | >= 300 nanoseconds | Beta-minus Decay | 100.00% |
| 89 | >= 300 nanoseconds | Beta-minus Decay (suspected) | No Data Available |
| 90 | > 635 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.