It's Elemental
Isotopes of the Element Europium
Europium
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 |
| 151 | 47.81% | >= 1.7×10+18 years |
| 153 | 52.19% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 130 | 0.90 milliseconds | Proton Emission | 100.00% |
| 131 | 17.8 milliseconds | Proton Emission | 89.00% |
| Electron Capture | 11.00% | ||
| 132 | No Data Available | Proton Emission | No Data Available |
| Electron Capture | No Data Available | ||
| 133 | No Data Available | Electron Capture (suspected) | No Data Available |
| 134 | 0.5 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | > 0.00% | ||
| 135 | 1.5 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 136 | 3.3 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.09% | ||
| 136m | 3.8 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.09% | ||
| 137 | 11 seconds | Electron Capture | 100.00% |
| 138 | 12.1 seconds | Electron Capture | 100.00% |
| 139 | 17.9 seconds | Electron Capture | 100.00% |
| 140 | 1.51 seconds | Electron Capture | 100.00% |
| 140m | 125 milliseconds | Electron Capture | < 1.00% |
| Isomeric Transition | 100.00% | ||
| 141 | 40.7 seconds | Electron Capture | 100.00% |
| 141m | 2.7 seconds | Isomeric Transition | 87.00% |
| Electron Capture | 13.00% | ||
| 142 | 2.34 seconds | Electron Capture | 100.00% |
| 142m | 1.223 minutes | Electron Capture | 100.00% |
| 143 | 2.59 minutes | Electron Capture | 100.00% |
| 144 | 10.2 seconds | Electron Capture | 100.00% |
| 145 | 5.93 days | Electron Capture | 100.00% |
| 146 | 4.61 days | Electron Capture | 100.00% |
| 147 | 24.1 days | Electron Capture | 100.00% |
| Alpha Decay | 2.2×10-3 % | ||
| 148 | 54.5 days | Electron Capture | 100.00% |
| Alpha Decay | 9.4×10-7 % | ||
| 149 | 93.1 days | Electron Capture | 100.00% |
| 150 | 36.9 years | Electron Capture | 100.00% |
| 150m | 12.8 hours | Beta-minus Decay | 89.00% |
| Electron Capture | 11.00% | ||
| Isomeric Transition | <= 5.0×10-8 % | ||
| 151 | >= 1.7×10+18 years | Alpha Decay | No Data Available |
| 152 | 13.528 years | Beta-minus Decay | 27.90% |
| Electron Capture | 72.10% | ||
| 152m | 9.3116 hours | Beta-minus Decay | 72.00% |
| Electron Capture | 28.00% | ||
| 152m1 | 96 minutes | Isomeric Transition | 100.00% |
| 153 | STABLE | - | - |
| 154 | 8.601 years | Beta-minus Decay | 99.98% |
| Electron Capture | 0.02% | ||
| 154m | 46.3 minutes | Isomeric Transition | 100.00% |
| 155 | 4.753 years | Beta-minus Decay | 100.00% |
| 156 | 15.19 days | Beta-minus Decay | 100.00% |
| 157 | 15.18 hours | Beta-minus Decay | 100.00% |
| 158 | 45.9 minutes | Beta-minus Decay | 100.00% |
| 159 | 18.1 minutes | Beta-minus Decay | 100.00% |
| 160 | 38 seconds | Beta-minus Decay | 100.00% |
| 161 | 26 seconds | Beta-minus Decay | 100.00% |
| 162 | 10.6 seconds | Beta-minus Decay | 100.00% |
| 163 | 7.7 seconds | Beta-minus Decay | 100.00% |
| 164 | 4.2 seconds | Beta-minus Decay | 100.00% |
| 165 | 2.3 seconds | Beta-minus Decay | 100.00% |
| 166 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 167 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.