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 |
| 79 | 50.69% | STABLE |
| 81 | 49.31% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 67 | No Data Available | Proton Emission (suspected) | No Data Available |
| 68 | 1.2 microseconds | Proton Emission (suspected) | No Data Available |
| 69 | 24 nanoseconds | Proton Emission (suspected) | No Data Available |
| 70 | 79.1 milliseconds | Electron Capture | 100.00% |
| 70m | 2.2 seconds | Electron Capture | 100.00% |
| 71 | 21.4 seconds | Electron Capture | 100.00% |
| 72 | 78.6 seconds | Electron Capture | 100.00% |
| 72m | 10.6 seconds | Isomeric Transition | 100.00% |
| Electron Capture | No Data Available | ||
| 73 | 3.4 minutes | Electron Capture | 100.00% |
| 74 | 25.4 minutes | Electron Capture | 100.00% |
| 74m | 46 minutes | Electron Capture | 100.00% |
| 75 | 96.7 minutes | Electron Capture | 100.00% |
| 76 | 16.2 hours | Electron Capture | 100.00% |
| 76m | 1.31 seconds | Isomeric Transition | > 99.40% |
| Electron Capture | < 0.60% | ||
| 77 | 57.036 hours | Electron Capture | 100.00% |
| 77m | 4.28 minutes | Isomeric Transition | 100.00% |
| 78 | 6.45 minutes | Electron Capture | >= 99.99% |
| Beta-minus Decay | <= 0.01% | ||
| 79 | STABLE | - | - |
| 79m | 5.1 seconds | Isomeric Transition | 100.00% |
| 80 | 17.68 minutes | Beta-minus Decay | 91.70% |
| Electron Capture | 8.30% | ||
| 80m | 4.4205 hours | Isomeric Transition | 100.00% |
| 81 | STABLE | - | - |
| 82 | 35.282 hours | Beta-minus Decay | 100.00% |
| 82m | 6.13 minutes | Isomeric Transition | 97.60% |
| Beta-minus Decay | 2.40% | ||
| 83 | 2.40 hours | Beta-minus Decay | 100.00% |
| 84 | 31.76 minutes | Beta-minus Decay | 100.00% |
| 84m | 6.0 minutes | Beta-minus Decay | 100.00% |
| 85 | 2.90 minutes | Beta-minus Decay | 100.00% |
| 86 | 55.1 seconds | Beta-minus Decay | 100.00% |
| 87 | 55.65 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 2.60% | ||
| 88 | 16.29 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 6.58% | ||
| 89 | 4.40 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 13.80% | ||
| 90 | 1.91 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 25.20% | ||
| 91 | 0.541 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 20.00% | ||
| 92 | 0.343 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 33.10% | ||
| 93 | 102 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 68.00% | ||
| 94 | 70 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 68.00% | ||
| 95 | >= 150 nanoseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 34.00% | ||
| 96 | >= 150 nanoseconds | Beta-minus Decay with delayed Neutron Emission | 27.60% |
| Beta-minus Decay | 100.00% | ||
| 97 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 98 | > 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.