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 |
| 89 | 100% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 76 | > 200 nanoseconds | Proton Emission | No Data Available |
| Electron Capture | No Data Available | ||
| 77 | 57 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| Proton Emission | No Data Available | ||
| 78 | 53 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 78m | 5.8 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 79 | 14.8 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 80 | 30.1 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 80m | 4.8 seconds | Isomeric Transition | 81.00% |
| Electron Capture | 19.00% | ||
| 81 | 70.4 seconds | Electron Capture | 100.00% |
| 82 | 8.30 seconds | Electron Capture | 100.00% |
| 83 | 7.08 minutes | Electron Capture | 100.00% |
| 83m | 2.85 minutes | Electron Capture | 60.00% |
| Isomeric Transition | 40.00% | ||
| 84 | 39.5 minutes | Electron Capture | 100.00% |
| 84m | 4.6 seconds | Electron Capture | 100.00% |
| 85 | 2.68 hours | Electron Capture | 100.00% |
| 85m | 4.86 hours | Electron Capture | 100.00% |
| Isomeric Transition | < 2.0×10-3 % | ||
| 86 | 14.74 hours | Electron Capture | 100.00% |
| 86m | 48 minutes | Isomeric Transition | 99.31% |
| Electron Capture | 0.69% | ||
| 87 | 79.8 hours | Electron Capture | 100.00% |
| 87m | 13.37 hours | Isomeric Transition | 98.43% |
| Electron Capture | 1.57% | ||
| 88 | 106.626 days | Electron Capture | 100.00% |
| 89 | STABLE | - | - |
| 89m | 15.663 seconds | Isomeric Transition | 100.00% |
| 90 | 64.053 hours | Beta-minus Decay | 100.00% |
| 90m | 3.19 hours | Isomeric Transition | 100.00% |
| Beta-minus Decay | 1.8×10-3 % | ||
| 91 | 58.51 days | Beta-minus Decay | 100.00% |
| 91m | 49.71 minutes | Isomeric Transition | 100.00% |
| Beta-minus Decay | < 1.50% | ||
| 92 | 3.54 hours | Beta-minus Decay | 100.00% |
| 93 | 10.18 hours | Beta-minus Decay | 100.00% |
| 93m | 0.82 seconds | Isomeric Transition | 100.00% |
| 94 | 18.7 minutes | Beta-minus Decay | 100.00% |
| 95 | 10.3 minutes | Beta-minus Decay | 100.00% |
| 96 | 5.34 seconds | Beta-minus Decay | 100.00% |
| 96m | 9.6 seconds | Beta-minus Decay | 100.00% |
| 97 | 3.75 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.06% | ||
| 97m | 1.17 seconds | Beta-minus Decay | > 99.30% |
| Isomeric Transition | < 0.70% | ||
| Beta-minus Decay with delayed Neutron Emission | < 0.08% | ||
| 97m1 | 142 milliseconds | Isomeric Transition | 98.40% |
| Beta-minus Decay | 1.60% | ||
| 98 | 0.548 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.33% | ||
| 98m | 2.0 seconds | Beta-minus Decay | > 80.00% |
| Isomeric Transition | < 20.00% | ||
| Beta-minus Decay with delayed Neutron Emission | 3.40% | ||
| 99 | 1.484 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 1.70% | ||
| 100 | 735 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.92% | ||
| 100m | 0.94 seconds | Beta-minus Decay | 100.00% |
| 101 | 0.45 seconds | Beta-minus Decay with delayed Neutron Emission | 1.94% |
| Beta-minus Decay | 100.00% | ||
| 102 | 0.36 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 4.90% | ||
| 102m | 0.298 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 4.90% | ||
| 103 | 0.23 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 8.00% | ||
| 104 | 197 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 105 | 85 milliseconds | Beta-minus Decay with delayed Neutron Emission | < 82.00% |
| Beta-minus Decay | No Data Available | ||
| 106 | 62 milliseconds | Beta-minus Decay | No Data Available |
| 107 | 41 milliseconds | Beta-minus Decay | 100.00% |
| 108 | 25 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 109 | > 393 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.