It's Elemental
Isotopes of the Element Terbium
Terbium
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 |
| 159 | 100% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 135 | 0.94 milliseconds | Proton Emission | 100.00% |
| 136 | No Data Available | Electron Capture (suspected) | No Data Available |
| 137 | No Data Available | Electron Capture (suspected) | No Data Available |
| Proton Emission (suspected) | No Data Available | ||
| 138 | >= 200 nanoseconds | Electron Capture | 100.00% |
| Proton Emission | No Data Available | ||
| 139 | 1.6 seconds | Electron Capture | No Data Available |
| Electron Capture with delayed Proton Emission (suspected) | No Data Available | ||
| 140 | 2.0 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.26% | ||
| 141 | 3.5 seconds | Electron Capture | 100.00% |
| 141m | 7.9 seconds | Electron Capture | 100.00% |
| 142 | 597 milliseconds | Electron Capture with delayed Proton Emission | 2.2×10-3 % |
| Electron Capture | 100.00% | ||
| 142m | 303 milliseconds | Isomeric Transition | 100.00% |
| 143 | 12 seconds | Electron Capture | 100.00% |
| 143m | < 21 seconds | Electron Capture | No Data Available |
| 144 | ≈ 1 seconds | Electron Capture | 100.00% |
| 144m | 4.25 seconds | Isomeric Transition | 66.00% |
| Electron Capture | 34.00% | ||
| 145 | No Data Available | Electron Capture (suspected) | No Data Available |
| 145m | 30.9 seconds | Electron Capture | 100.00% |
| 146 | 8 seconds | Electron Capture | 100.00% |
| 146m | 23 seconds | Electron Capture | 100.00% |
| 146m1 | 1.18 milliseconds | Isomeric Transition | 100.00% |
| 147 | 1.64 hours | Electron Capture | 100.00% |
| 147m | 1.83 minutes | Electron Capture | 100.00% |
| 148 | 60 minutes | Electron Capture | 100.00% |
| 148m | 2.20 minutes | Electron Capture | 100.00% |
| 149 | 4.118 hours | Electron Capture | 83.30% |
| Alpha Decay | 16.70% | ||
| 149m | 4.16 minutes | Electron Capture | 99.98% |
| Alpha Decay | 0.02% | ||
| 150 | 3.48 hours | Electron Capture | 100.00% |
| Alpha Decay | < 0.05% | ||
| 150m | 5.8 minutes | Electron Capture | No Data Available |
| 151 | 17.609 hours | Electron Capture | 99.99% |
| Alpha Decay | 9.5×10-3 % | ||
| 151m | 25 seconds | Isomeric Transition | 93.40% |
| Electron Capture | 6.60% | ||
| 152 | 17.5 hours | Electron Capture | 100.00% |
| Alpha Decay | < 7.0×10-7 % | ||
| 152m | 4.2 minutes | Isomeric Transition | 78.80% |
| Electron Capture | 21.20% | ||
| 153 | 2.34 days | Electron Capture | 100.00% |
| 154 | 21.5 hours | Electron Capture | 100.00% |
| Beta-minus Decay | < 0.10% | ||
| 154m | 22.7 hours | Electron Capture | 98.20% |
| Isomeric Transition | 1.80% | ||
| 154m1 | 9.4 hours | Electron Capture | 78.20% |
| Isomeric Transition | 21.80% | ||
| Beta-minus Decay | < 0.10% | ||
| 155 | 5.32 days | Electron Capture | 100.00% |
| 156 | 5.35 days | Electron Capture | 100.00% |
| 156m | 24.4 hours | Isomeric Transition | 100.00% |
| 156m1 | 5.3 hours | Electron Capture | > 0.00% |
| Isomeric Transition | < 100.00% | ||
| 157 | 71 years | Electron Capture | 100.00% |
| 158 | 180 years | Electron Capture | 83.40% |
| Beta-minus Decay | 16.60% | ||
| 158m | 10.70 seconds | Isomeric Transition | 100.00% |
| Beta-minus Decay | < 0.60% | ||
| Electron Capture | < 0.01% | ||
| 158m1 | 0.40 milliseconds | Isomeric Transition | 100.00% |
| 159 | STABLE | - | - |
| 160 | 72.3 days | Beta-minus Decay | 100.00% |
| 161 | 6.89 days | Beta-minus Decay | 100.00% |
| 162 | 7.60 minutes | Beta-minus Decay | 100.00% |
| 163 | 19.5 minutes | Beta-minus Decay | 100.00% |
| 164 | 3.0 minutes | Beta-minus Decay | 100.00% |
| 165 | 2.11 minutes | Beta-minus Decay | 100.00% |
| 166 | 25.1 seconds | Beta-minus Decay | 100.00% |
| 167 | 19.4 seconds | Beta-minus Decay | 100.00% |
| 168 | 8.2 seconds | Beta-minus Decay | 100.00% |
| 169 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 170 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 171 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.