It's Elemental
Isotopes of the Element Holmium
Holmium
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 |
| 165 | 100% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 140 | 6 milliseconds | Proton Emission | 100.00% |
| 141 | 4.1 milliseconds | Proton Emission | 100.00% |
| 142 | 0.4 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | > 0.00% | ||
| 143 | No Data Available | Electron Capture with delayed Proton Emission (suspected) | No Data Available |
| Electron Capture (suspected) | No Data Available | ||
| 144 | 0.7 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 145 | 2.4 seconds | Electron Capture | 100.00% |
| 146 | 3.6 seconds | Electron Capture | 100.00% |
| 147 | 5.8 seconds | Electron Capture | 100.00% |
| 148 | 2.2 seconds | Electron Capture | 100.00% |
| 148m | 9.59 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.08% | ||
| 148m1 | 2.35 milliseconds | Isomeric Transition | 100.00% |
| 149 | 21.1 seconds | Electron Capture | 100.00% |
| 149m | 56 seconds | Electron Capture | 100.00% |
| 150 | 72 seconds | Electron Capture | 100.00% |
| 150m | 24.1 seconds | Electron Capture | 100.00% |
| No Data Available | No Data Available | ||
| 151 | 35.2 seconds | Electron Capture | 78.00% |
| Alpha Decay | 22.00% | ||
| 151m | 47.2 seconds | Alpha Decay | 80.00% |
| Electron Capture | 20.00% | ||
| 152 | 161.8 seconds | Electron Capture | 88.00% |
| Alpha Decay | 12.00% | ||
| 152m | 50.0 seconds | Alpha Decay | 10.80% |
| Electron Capture | 89.20% | ||
| 153 | 2.01 minutes | Electron Capture | 99.95% |
| Alpha Decay | 0.05% | ||
| 153m | 9.3 minutes | Electron Capture | 99.82% |
| Alpha Decay | 0.18% | ||
| 154 | 11.76 minutes | Electron Capture | 99.98% |
| Alpha Decay | 0.02% | ||
| 154m | 3.10 minutes | Electron Capture | 100.00% |
| Alpha Decay | < 1.0×10-3 % | ||
| 155 | 48 minutes | Electron Capture | 100.00% |
| 155m | 0.88 milliseconds | Isomeric Transition | 100.00% |
| 156 | 56 minutes | Electron Capture | 100.00% |
| 156m | 9.5 seconds | Isomeric Transition | 100.00% |
| 156m1 | 7.8 minutes | Electron Capture | 75.00% |
| Isomeric Transition | 25.00% | ||
| 157 | 12.6 minutes | Electron Capture | 100.00% |
| 158 | 11.3 minutes | Electron Capture | 100.00% |
| 158m | 28 minutes | Isomeric Transition | > 81.00% |
| Electron Capture | < 19.00% | ||
| 158m1 | 21.3 minutes | Electron Capture | >= 93.00% |
| Isomeric Transition | <= 7.00% | ||
| 159 | 33.05 minutes | Electron Capture | 100.00% |
| 159m | 8.30 seconds | Isomeric Transition | 100.00% |
| 160 | 25.6 minutes | Electron Capture | 100.00% |
| 160m | 5.02 hours | Electron Capture | 27.00% |
| Isomeric Transition | 73.00% | ||
| 160m1 | 3 seconds | Isomeric Transition | 100.00% |
| 161 | 2.48 hours | Electron Capture | 100.00% |
| 161m | 6.76 seconds | Isomeric Transition | 100.00% |
| 162 | 15.0 minutes | Electron Capture | 100.00% |
| 162m | 67.0 minutes | Isomeric Transition | 62.00% |
| Electron Capture | 38.00% | ||
| 163 | 4570 years | Electron Capture | 100.00% |
| 163m | 1.09 seconds | Isomeric Transition | 100.00% |
| 164 | 29 minutes | Electron Capture | 60.00% |
| Beta-minus Decay | 40.00% | ||
| 164m | 37.5 minutes | Isomeric Transition | 100.00% |
| 165 | STABLE | - | - |
| 166 | 26.824 hours | Beta-minus Decay | 100.00% |
| 166m | 1.20×103 years | Beta-minus Decay | 100.00% |
| 167 | 3.003 hours | Beta-minus Decay | 100.00% |
| 168 | 2.99 minutes | Beta-minus Decay | 100.00% |
| 168m | 132 seconds | Isomeric Transition | >= 99.50% |
| Beta-minus Decay | <= 0.50% | ||
| 169 | 4.72 minutes | Beta-minus Decay | 100.00% |
| 170 | 2.76 minutes | Beta-minus Decay | 100.00% |
| 170m | 43 seconds | Beta-minus Decay | 100.00% |
| 171 | 53 seconds | Beta-minus Decay | 100.00% |
| 172 | 25 seconds | Beta-minus Decay | 100.00% |
| 173 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 174 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 175 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
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