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 |
| 107 | 51.839% | STABLE |
| 109 | 48.161% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 93 | No Data Available | Proton Emission | No Data Available |
| Electron Capture | No Data Available | ||
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 94 | 26 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 94m | 0.60 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 20.00% | ||
| 94m1 | 0.40 seconds | Electron Capture | 95.40% |
| Electron Capture with delayed Proton Emission | 27.00% | ||
| Proton Emission | 4.10% | ||
| Double Proton Emission | 0.50% | ||
| 95 | 1.75 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 95m | < 500 milliseconds | Isomeric Transition | 100.00% |
| 96 | 4.40 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 8.50% | ||
| 96m | 6.9 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 18.00% | ||
| 97 | 25.5 seconds | Electron Capture | 100.00% |
| 98 | 47.5 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 1.1×10-3 % | ||
| 99 | 124 seconds | Electron Capture | 100.00% |
| 99m | 10.5 seconds | Isomeric Transition | 100.00% |
| 100 | 2.01 minutes | Electron Capture | 100.00% |
| 100m | 2.24 minutes | Isomeric Transition | No Data Available |
| Electron Capture | No Data Available | ||
| 101 | 11.1 minutes | Electron Capture | 100.00% |
| 101m | 3.10 seconds | Isomeric Transition | 100.00% |
| 102 | 12.9 minutes | Electron Capture | 100.00% |
| 102m | 7.7 minutes | Electron Capture | 51.00% |
| Isomeric Transition | 49.00% | ||
| 103 | 65.7 minutes | Electron Capture | 100.00% |
| 103m | 5.7 seconds | Isomeric Transition | 100.00% |
| 104 | 69.2 minutes | Electron Capture | 100.00% |
| 104m | 33.5 minutes | Isomeric Transition | < 0.07% |
| Electron Capture | 99.93% | ||
| 105 | 41.29 days | Electron Capture | 100.00% |
| 105m | 7.23 minutes | Isomeric Transition | 99.66% |
| Electron Capture | 0.34% | ||
| 106 | 23.96 minutes | Electron Capture | 99.50% |
| Beta-minus Decay | < 1.00% | ||
| 106m | 8.28 days | Electron Capture | 100.00% |
| 107 | STABLE | - | - |
| 107m | 44.3 seconds | Isomeric Transition | 100.00% |
| 108 | 2.382 minutes | Beta-minus Decay | 97.15% |
| Electron Capture | 2.85% | ||
| 108m | 438 years | Electron Capture | 91.30% |
| Isomeric Transition | 8.70% | ||
| 109 | STABLE | - | - |
| 109m | 39.6 seconds | Isomeric Transition | 100.00% |
| 110 | 24.6 seconds | Beta-minus Decay | 99.70% |
| Electron Capture | 0.30% | ||
| 110m | 249.76 days | Beta-minus Decay | 98.64% |
| Isomeric Transition | 1.36% | ||
| 111 | 7.45 days | Beta-minus Decay | 100.00% |
| 111m | 64.8 seconds | Isomeric Transition | 99.30% |
| Beta-minus Decay | 0.70% | ||
| 112 | 3.130 hours | Beta-minus Decay | 100.00% |
| 113 | 5.37 hours | Beta-minus Decay | 100.00% |
| 113m | 68.7 seconds | Isomeric Transition | 64.00% |
| Beta-minus Decay | 36.00% | ||
| 114 | 4.6 seconds | Beta-minus Decay | 100.00% |
| 115 | 20.0 minutes | Beta-minus Decay | 100.00% |
| 115m | 18.0 seconds | Beta-minus Decay | 79.00% |
| Isomeric Transition | 21.00% | ||
| 116 | 237 seconds | Beta-minus Decay | 100.00% |
| 116m | 20 seconds | Beta-minus Decay | 93.00% |
| Isomeric Transition | 7.00% | ||
| 116m1 | 9.3 seconds | Beta-minus Decay | 92.00% |
| Isomeric Transition | 8.00% | ||
| 117 | 72.8 seconds | Beta-minus Decay | 100.00% |
| 117m | 5.34 seconds | Beta-minus Decay | 94.00% |
| Isomeric Transition | 6.00% | ||
| 118 | 3.76 seconds | Beta-minus Decay | 100.00% |
| 118m | 2.0 seconds | Beta-minus Decay | 59.00% |
| Isomeric Transition | 41.00% | ||
| 119 | 6.0 seconds | Beta-minus Decay | 100.00% |
| 119m | 2.1 seconds | Beta-minus Decay | 100.00% |
| 120 | 1.23 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | < 3.0×10-3 % | ||
| 120m | 0.40 seconds | Isomeric Transition | ~ 37.00% |
| Beta-minus Decay | ~ 63.00% | ||
| 121 | 0.78 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.08% | ||
| 122 | 0.529 seconds | Beta-minus Decay | 99.80% |
| Beta-minus Decay with delayed Neutron Emission | 0.20% | ||
| 122m | 0.55 seconds | Beta-minus Decay | No Data Available |
| Isomeric Transition | No Data Available | ||
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 122m1 | 0.20 seconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 123 | 0.300 seconds | Beta-minus Decay with delayed Neutron Emission | 0.55% |
| Beta-minus Decay | 100.00% | ||
| 124 | 0.172 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 1.30% | ||
| 125 | 166 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 126 | 107 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 127 | 109 milliseconds | Beta-minus Decay | 100.00% |
| 128 | 58 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 129 | 46 milliseconds | Beta-minus Decay with delayed Neutron Emission | No Data Available |
| Beta-minus Decay | 100.00% | ||
| 129m | ≈ 160 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 130 | ≈ 50 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available |
This page is maintained by Steve Gagnon.