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 |
| 106 | 1.25% | > 3.6×10+20 years |
| 108 | 0.89% | > 1.9×10+18 years |
| 110 | 12.49% | STABLE |
| 111 | 12.80% | STABLE |
| 112 | 24.13% | STABLE |
| 113 | 12.22% | 8.00×1015 years |
| 114 | 28.73% | > 2.1×1018 years |
| 116 | 7.49% | 3.3×10+19 years |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 95 | No Data Available | Electron Capture with delayed Proton Emission (suspected) | No Data Available |
| Electron Capture (suspected) | No Data Available | ||
| 96 | 1.03 seconds | Electron Capture | 100.00% |
| 97 | 1.10 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 12.0% | ||
| 97m | 3.70 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 25.0% | ||
| 98 | 9.2 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | < 0.03% | ||
| 99 | 16 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Alpha Decay | < 1.0×10-4 % | ||
| Electron Capture with delayed Proton Emission | 0.17% | ||
| 100 | 49.1 seconds | Electron Capture | 100.00% |
| 101 | 1.36 minutes | Electron Capture | 100.00% |
| 102 | 5.5 minutes | Electron Capture | 100.00% |
| 103 | 7.3 minutes | Electron Capture | 100.00% |
| 104 | 57.7 minutes | Electron Capture | 100.00% |
| 105 | 55.5 minutes | Electron Capture | 100.00% |
| 106 | > 3.6×10+20 years | Double Electron Capture | No Data Available |
| 107 | 6.50 hours | Electron Capture | 100.00% |
| 108 | > 1.9×10+18 years | Double Electron Capture | No Data Available |
| 109 | 461.4 days | Electron Capture | 100.00% |
| 110 | STABLE | - | - |
| 111 | STABLE | - | - |
| 111m | 48.50 minutes | Isomeric Transition | 100.00% |
| 112 | STABLE | - | - |
| 113 | 8.00×1015 years | Beta-minus Decay | 100.00% |
| 113m | 14.1 years | Beta-minus Decay | 99.86% |
| Isomeric Transition | 0.14% | ||
| 114 | > 2.1×1018 years | Double Beta-minus Decay | No Data Available |
| 115 | 53.46 hours | Beta-minus Decay | 100.00% |
| 115m | 44.56 days | Beta-minus Decay | 100.00% |
| 116 | 3.3×10+19 years | Double Beta-minus Decay | No Data Available |
| 117 | 2.49 hours | Beta-minus Decay | 100.00% |
| 117m | 3.36 hours | Beta-minus Decay | 100.00% |
| 118 | 50.3 minutes | Beta-minus Decay | 100.00% |
| 119 | 2.69 minutes | Beta-minus Decay | 100.00% |
| 119m | 2.20 minutes | Beta-minus Decay | 100.00% |
| 120 | 50.80 seconds | Beta-minus Decay | 100.00% |
| 121 | 13.5 seconds | Beta-minus Decay | 100.00% |
| 121m | 8.3 seconds | Beta-minus Decay | 100.00% |
| 122 | 5.24 seconds | Beta-minus Decay | 100.00% |
| 123 | 2.10 seconds | Beta-minus Decay | 100.00% |
| 123m | 1.82 seconds | Beta-minus Decay | <= 100.00% |
| Isomeric Transition | No Data Available | ||
| 124 | 1.25 seconds | Beta-minus Decay | 100.00% |
| 125 | 0.68 seconds | Beta-minus Decay | 100.00% |
| 125m | 0.48 seconds | Beta-minus Decay | 100.00% |
| 126 | 0.515 seconds | Beta-minus Decay | 100.00% |
| 127 | 0.37 seconds | Beta-minus Decay | 100.00% |
| 128 | 0.28 seconds | Beta-minus Decay | 100.00% |
| 129 | 0.27 seconds | No Data Available | No Data Available |
| 130 | 162 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 3.50% | ||
| 131 | 68 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 3.50% | ||
| 132 | 97 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 60.00% | ||
| 133 | 57 milliseconds | Beta-minus Decay with delayed Neutron Emission | No Data Available |
| Beta-minus Decay with delayed Double Neutron Emission | No Data Available | ||
| Beta-minus Decay | 100.00% |
This page is maintained by Steve Gagnon.