It's Elemental
Isotopes of the Element Lutetium
Lutetium
Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.
Isotopes With A Known Natural Abundance
| Mass Number | Natural Abundance | Half-life |
| 175 | 97.401% | STABLE |
| 176 | 2.599% | 3.76×10+10 years |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 150 | 45 milliseconds | Proton Emission | 70.90% |
| Electron Capture | 29.10% | ||
| 151 | 80.6 milliseconds | Proton Emission | 63.40% |
| Electron Capture | 36.60% | ||
| 152 | 0.7 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 15.00% | ||
| 153 | 0.9 seconds | Alpha Decay | ~ 70.00% |
| Electron Capture | ~ 30.00% | ||
| 154 | No Data Available | No Data Available | No Data Available |
| 154m | 1.12 seconds | Electron Capture | 100.00% |
| 155 | 68 milliseconds | Alpha Decay | 90.00% |
| Electron Capture | 10.00% | ||
| 155m | 138 milliseconds | Alpha Decay | 76.00% |
| Electron Capture | 24.00% | ||
| 155m1 | 2.69 milliseconds | Alpha Decay | 100.00% |
| 156 | 494 milliseconds | Alpha Decay | ~ 95.00% |
| Electron Capture | ~ 5.00% | ||
| 156m | 198 milliseconds | Alpha Decay | 100.00% |
| 157 | 6.8 seconds | Alpha Decay | > 0.00% |
| 157m | 4.79 seconds | Electron Capture | 94.00% |
| Alpha Decay | 6.00% | ||
| 158 | 10.6 seconds | Electron Capture | 99.09% |
| Alpha Decay | 0.91% | ||
| 159 | 12.1 seconds | Electron Capture | 100.00% |
| Alpha Decay | 0.10% | ||
| 160 | 36.1 seconds | Electron Capture | 100.00% |
| Alpha Decay | <= 1.0×10-4 % | ||
| 160m | 40 seconds | Electron Capture | <= 100.00% |
| Alpha Decay | No Data Available | ||
| 161 | 77 seconds | Electron Capture | 100.00% |
| 161m | 7.3 milliseconds | Isomeric Transition | No Data Available |
| 162 | 1.37 minutes | Electron Capture | <= 100.00% |
| 162m | 1.9 minutes | Electron Capture | <= 100.00% |
| 162m1 | 1.5 minutes | Electron Capture | <= 100.00% |
| 163 | 3.97 minutes | Electron Capture | 100.00% |
| 164 | 3.14 minutes | Electron Capture | 100.00% |
| 165 | 10.74 minutes | Electron Capture | 100.00% |
| 166 | 2.65 minutes | Electron Capture | 100.00% |
| 166m | 1.41 minutes | Electron Capture | 58.00% |
| Isomeric Transition | 42.00% | ||
| 166m1 | 2.12 minutes | Electron Capture | > 80.00% |
| Isomeric Transition | < 20.00% | ||
| 167 | 51.5 minutes | Electron Capture | 100.00% |
| 167m | >= 1 minutes | Isomeric Transition | No Data Available |
| Electron Capture | No Data Available | ||
| 168 | 5.5 minutes | Electron Capture | 100.00% |
| 168m | 6.7 minutes | Electron Capture | > 99.60% |
| Isomeric Transition | < 0.80% | ||
| 169 | 34.06 hours | Electron Capture | 100.00% |
| 169m | 160 seconds | Isomeric Transition | 100.00% |
| 170 | 2.012 days | Electron Capture | 100.00% |
| 170m | 0.67 seconds | Isomeric Transition | 100.00% |
| 171 | 8.24 days | Electron Capture | 100.00% |
| 171m | 79 seconds | Isomeric Transition | 100.00% |
| 172 | 6.70 days | Electron Capture | 100.00% |
| 172m | 3.7 minutes | Isomeric Transition | 100.00% |
| 173 | 1.37 years | Electron Capture | 100.00% |
| 174 | 3.31 years | Electron Capture | 100.00% |
| 174m | 142 days | Isomeric Transition | 99.38% |
| Electron Capture | 0.62% | ||
| 175 | STABLE | - | - |
| 176 | 3.76×10+10 years | Beta-minus Decay | 100.00% |
| 176m | 3.664 hours | Beta-minus Decay | 99.90% |
| Electron Capture | 0.09% | ||
| 177 | 6.647 days | Beta-minus Decay | 100.00% |
| 177m | 160.44 days | Isomeric Transition | 21.40% |
| Beta-minus Decay | 78.60% | ||
| 177m1 | 6 minutes | Beta-minus Decay | 100.00% |
| Isomeric Transition (suspected) | No Data Available | ||
| 178 | 28.4 minutes | Beta-minus Decay | 100.00% |
| 178m | 23.1 minutes | Beta-minus Decay | 100.00% |
| 179 | 4.59 hours | Beta-minus Decay | 100.00% |
| 179m | 3.1 milliseconds | Isomeric Transition | 100.00% |
| 180 | 5.7 minutes | Beta-minus Decay | 100.00% |
| 181 | 3.5 minutes | Beta-minus Decay | 100.00% |
| 182 | 2.0 minutes | Beta-minus Decay | 100.00% |
| 183 | 58 seconds | Beta-minus Decay | 100.00% |
| 184 | 19 seconds | Beta-minus Decay | 100.00% |
Citation and linking information
For questions about this page, please contact Carol McKisson.