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 |
| 162 | 0.139% | STABLE |
| 164 | 1.601% | STABLE |
| 166 | 33.503% | STABLE |
| 167 | 22.869% | STABLE |
| 168 | 26.978% | STABLE |
| 170 | 14.910% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 142 | No Data Available | No Data Available | No Data Available |
| 143 | No Data Available | Electron Capture (suspected) | No Data Available |
| 144 | >= 200 nanoseconds | Electron Capture | 100.00% |
| 145 | No Data Available | Electron Capture (suspected) | No Data Available |
| 145m | 1.0 seconds | Electron Capture with delayed Proton Emission | No Data Available |
| Electron Capture | 100.00% | ||
| 146 | 1.7 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 100.00% | ||
| 147 | 2.5 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | > 0.00% | ||
| 147m | 1.6 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | > 0.00% | ||
| 148 | 4.6 seconds | Electron Capture | 100.00% |
| 149 | 4 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 7.00% | ||
| 149m | 8.9 seconds | Isomeric Transition | 3.50% |
| Electron Capture with delayed Proton Emission | 0.18% | ||
| Electron Capture | 96.50% | ||
| 150 | 18.5 seconds | Electron Capture | 100.00% |
| 151 | 23.5 seconds | Electron Capture | 100.00% |
| 151m | 0.58 seconds | Isomeric Transition | 95.30% |
| Electron Capture | 4.70% | ||
| 152 | 10.3 seconds | Alpha Decay | 90.00% |
| Electron Capture | 10.00% | ||
| 153 | 37.1 seconds | Alpha Decay | 53.00% |
| Electron Capture | 47.00% | ||
| 154 | 3.73 minutes | Electron Capture | 99.53% |
| Alpha Decay | 0.47% | ||
| 155 | 5.3 minutes | Electron Capture | 99.98% |
| Alpha Decay | 0.02% | ||
| 156 | 19.5 minutes | Electron Capture | 100.00% |
| Alpha Decay | 1.7×10-5 % | ||
| 157 | 18.65 minutes | Electron Capture | 100.00% |
| 157m | 76 milliseconds | Isomeric Transition | 100.00% |
| 158 | 2.29 hours | Electron Capture | 100.00% |
| 159 | 36 minutes | Electron Capture | 100.00% |
| 160 | 28.58 hours | Electron Capture | 100.00% |
| 161 | 3.21 hours | Electron Capture | 100.00% |
| 162 | STABLE | - | - |
| 163 | 75.0 minutes | Electron Capture | 100.00% |
| 164 | STABLE | - | - |
| 165 | 10.36 hours | Electron Capture | 100.00% |
| 166 | STABLE | - | - |
| 167 | STABLE | - | - |
| 167m | 2.269 seconds | Isomeric Transition | 100.00% |
| 168 | STABLE | - | - |
| 169 | 9.392 days | Beta-minus Decay | 100.00% |
| 170 | STABLE | - | - |
| 171 | 7.516 hours | Beta-minus Decay | 100.00% |
| 172 | 49.3 hours | Beta-minus Decay | 100.00% |
| 173 | 1.4 minutes | Beta-minus Decay | 100.00% |
| 174 | 3.2 minutes | Beta-minus Decay | 100.00% |
| 175 | 1.2 minutes | Beta-minus Decay | 100.00% |
| 176 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 177 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
This page is maintained by Steve Gagnon.