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 |
| 169 | 100% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 144 | 1.9 microseconds | Proton Emission | > 0.00% |
| 145 | 3.17 microseconds | Proton Emission | 100.00% |
| 146 | 80 milliseconds | Electron Capture | No Data Available |
| Proton Emission | No Data Available | ||
| 146m | 200 milliseconds | Proton Emission | No Data Available |
| Electron Capture | No Data Available | ||
| 147 | 0.58 seconds | Electron Capture | 85.00% |
| Proton Emission | 15.00% | ||
| 147m | 0.36 milliseconds | Proton Emission | 100.00% |
| 148 | 0.7 seconds | Electron Capture | 100.00% |
| 149 | 0.9 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.20% | ||
| 150 | 2.20 seconds | Electron Capture | 100.00% |
| 150m | 5.2 milliseconds | Isomeric Transition | 100.00% |
| 151 | 4.17 seconds | Electron Capture | 100.00% |
| 151m | 6.6 seconds | Electron Capture | 100.00% |
| 152 | 8.0 seconds | Electron Capture | 100.00% |
| 152m | 5.2 seconds | Electron Capture | 100.00% |
| 153 | 1.48 seconds | Alpha Decay | 91.00% |
| Electron Capture | 9.00% | ||
| 153m | 2.5 seconds | Alpha Decay | 92.00% |
| Electron Capture | 8.00% | ||
| 154 | 8.1 seconds | Alpha Decay | 54.00% |
| Electron Capture | 46.00% | ||
| 154m | 3.30 seconds | Electron Capture | 42.00% |
| Isomeric Transition | No Data Available | ||
| Alpha Decay | 58.00% | ||
| 155 | 21.6 seconds | Electron Capture | 99.11% |
| Alpha Decay | 0.89% | ||
| 155m | 45 seconds | Electron Capture | > 98.00% |
| Alpha Decay | < 2.00% | ||
| 156 | 83.8 seconds | Electron Capture | 99.94% |
| Alpha Decay | 0.06% | ||
| 157 | 3.63 minutes | Electron Capture | 100.00% |
| 158 | 3.98 minutes | Electron Capture | 100.00% |
| 158m | 20 seconds | Electron Capture (suspected) | No Data Available |
| 159 | 9.13 minutes | Electron Capture | 100.00% |
| 160 | 9.4 minutes | Electron Capture | 100.00% |
| 160m | 74.5 seconds | Isomeric Transition | 85.00% |
| Electron Capture | 15.00% | ||
| 161 | 30.2 minutes | Electron Capture | 100.00% |
| 162 | 21.70 minutes | Electron Capture | 100.00% |
| 162m | 24.3 seconds | Isomeric Transition | 81.00% |
| Electron Capture | 19.00% | ||
| 163 | 1.810 hours | Electron Capture | 100.00% |
| 164 | 2.0 minutes | Electron Capture | 100.00% |
| 164m | 5.1 minutes | Isomeric Transition | ~ 80.00% |
| Electron Capture | ~ 20.00% | ||
| 165 | 30.06 hours | Electron Capture | 100.00% |
| 166 | 7.70 hours | Electron Capture | 100.00% |
| 166m | 340 milliseconds | Isomeric Transition | 100.00% |
| 167 | 9.25 days | Electron Capture | 100.00% |
| 168 | 93.1 days | Electron Capture | 99.99% |
| Beta-minus Decay | 0.01% | ||
| 169 | STABLE | - | - |
| 170 | 128.6 days | Beta-minus Decay | 99.87% |
| Electron Capture | 0.13% | ||
| 171 | 1.92 years | Beta-minus Decay | 100.00% |
| 172 | 63.6 hours | Beta-minus Decay | 100.00% |
| 173 | 8.24 hours | Beta-minus Decay | 100.00% |
| 174 | 5.4 minutes | Beta-minus Decay | 100.00% |
| 174m | 2.29 seconds | Isomeric Transition | 99.00% |
| Beta-minus Decay | < 1.00% | ||
| 175 | 15.2 minutes | Beta-minus Decay | 100.00% |
| 176 | 1.9 minutes | Beta-minus Decay | 100.00% |
| 177 | 90 seconds | Beta-minus Decay | 100.00% |
| 178 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 179 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
This page is maintained by Steve Gagnon.