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 |
| 90 | 51.45% | STABLE |
| 91 | 11.22% | STABLE |
| 92 | 17.15% | STABLE |
| 94 | 17.38% | STABLE |
| 96 | 2.80% | 2.35×10+19 years |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 78 | > 170 nanoseconds | Electron Capture | No Data Available |
| 79 | 56 milliseconds | Electron Capture | No Data Available |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 80 | 4.6 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 81 | 5.5 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.12% | ||
| 82 | 32 seconds | Electron Capture | 100.00% |
| 83 | 41.6 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 84 | 25.8 minutes | Electron Capture | 100.00% |
| 85 | 7.86 minutes | Electron Capture | 100.00% |
| 85m | 10.9 seconds | Isomeric Transition | <= 92.00% |
| Electron Capture | > 8.00% | ||
| 86 | 16.5 hours | Electron Capture | 100.00% |
| 87 | 1.68 hours | Electron Capture | 100.00% |
| 87m | 14.0 seconds | Isomeric Transition | 100.00% |
| 88 | 83.4 days | Electron Capture | 100.00% |
| 89 | 78.41 hours | Electron Capture | 100.00% |
| 89m | 4.161 minutes | Isomeric Transition | 93.77% |
| Electron Capture | 6.23% | ||
| 90 | STABLE | - | - |
| 90m | 809.2 milliseconds | Isomeric Transition | 100.00% |
| 91 | STABLE | - | - |
| 92 | STABLE | - | - |
| 93 | 1.61×10+6 years | Beta-minus Decay | 100.00% |
| 94 | STABLE | - | - |
| 95 | 64.032 days | Beta-minus Decay | 100.00% |
| 96 | 2.35×10+19 years | Double Beta-minus Decay | No Data Available |
| 97 | 16.749 hours | Beta-minus Decay | 100.00% |
| 98 | 30.7 seconds | Beta-minus Decay | 100.00% |
| 99 | 2.1 seconds | Beta-minus Decay | 100.00% |
| 100 | 7.1 seconds | Beta-minus Decay | 100.00% |
| 101 | 2.3 seconds | Beta-minus Decay | 100.00% |
| 102 | 2.9 seconds | Beta-minus Decay | 100.00% |
| 103 | 1.32 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | <= 1.00% | ||
| 104 | 0.87 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | <= 1.00% | ||
| 105 | 0.66 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | <= 2.00% | ||
| 106 | 191 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | <= 7.00% | ||
| 107 | 138 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | <= 23.00% | ||
| 108 | 73 milliseconds | Beta-minus Decay with delayed Neutron Emission | No Data Available |
| Beta-minus Decay | 100.00% | ||
| 109 | 63 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 110 | 37 milliseconds | Beta-minus Decay | No Data Available |
| 111 | > 392 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 | ||
| 112 | > 394 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.