It's Elemental
Isotopes of the Element Gadolinium
Gadolinium
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 |
| 152 | 0.20% | 1.08×1014 years |
| 154 | 2.18% | STABLE |
| 155 | 14.80% | STABLE |
| 156 | 20.47% | STABLE |
| 157 | 15.65% | STABLE |
| 158 | 24.84% | STABLE |
| 160 | 21.86% | > 3.1×10+19 years |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 133 | No Data Available | No Data Available | No Data Available |
| 134 | No Data Available | Electron Capture (suspected) | No Data Available |
| 135 | 1.1 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 18.00% | ||
| 136 | >= 200 nanoseconds | No Data Available | No Data Available |
| 137 | 2.2 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 138 | 4.7 seconds | Electron Capture | 100.00% |
| 139 | 5.8 seconds | Electron Capture with delayed Proton Emission | > 0.00% |
| Electron Capture | > 0.00% | ||
| 139m | 4.8 seconds | Electron Capture | > 0.00% |
| Electron Capture with delayed Proton Emission | > 0.00% | ||
| 140 | 15.8 seconds | Electron Capture | 100.00% |
| 141 | 14 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.03% | ||
| 141m | 24.5 seconds | Electron Capture | 89.00% |
| Isomeric Transition | 11.00% | ||
| 142 | 70.2 seconds | Electron Capture | 100.00% |
| 143 | 39 seconds | Electron Capture | 100.00% |
| 143m | 110.0 seconds | Electron Capture | 100.00% |
| 144 | 4.47 minutes | Electron Capture | 100.00% |
| 145 | 23.0 minutes | Electron Capture | 100.00% |
| 145m | 85 seconds | Isomeric Transition | 94.30% |
| Electron Capture | 5.70% | ||
| 146 | 48.27 days | Electron Capture | 100.00% |
| 147 | 38.06 hours | Electron Capture | 100.00% |
| 148 | 70.9 years | Alpha Decay | 100.00% |
| 149 | 9.28 days | Electron Capture | 100.00% |
| Alpha Decay | 4.3×10-4 % | ||
| 150 | 1.79×10+6 years | Alpha Decay | 100.00% |
| 151 | 123.9 days | Electron Capture | 100.00% |
| Alpha Decay | ~ 8.0×10-7 % | ||
| 152 | 1.08×1014 years | Alpha Decay | 100.00% |
| 153 | 240.4 days | Electron Capture | 100.00% |
| 154 | STABLE | - | - |
| 155 | STABLE | - | - |
| 155m | 31.97 milliseconds | Isomeric Transition | 100.00% |
| 156 | STABLE | - | - |
| 157 | STABLE | - | - |
| 158 | STABLE | - | - |
| 159 | 18.479 hours | Beta-minus Decay | 100.00% |
| 160 | > 3.1×10+19 years | Double Beta-minus Decay | No Data Available |
| 161 | 3.66 minutes | Beta-minus Decay | 100.00% |
| 162 | 8.4 minutes | Beta-minus Decay | 100.00% |
| 163 | 68 seconds | Beta-minus Decay | 100.00% |
| 164 | 45 seconds | Beta-minus Decay | 100.00% |
| 165 | 10.3 seconds | Beta-minus Decay | 100.00% |
| 166 | 4.8 seconds | Beta-minus Decay | 100.00% |
| 167 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 168 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 169 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
Citation and linking information
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