It's Elemental
Isotopes of the Element Hafnium
Hafnium
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 |
| 174 | 0.16% | 2.0×10+15 years |
| 176 | 5.26% | STABLE |
| 177 | 18.60% | STABLE |
| 178 | 27.28% | STABLE |
| 179 | 13.62% | STABLE |
| 180 | 35.08% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 153 | 60 nanoseconds | Electron Capture (suspected) | No Data Available |
| 154 | 2 seconds | Electron Capture | 100.00% |
| Alpha Decay (suspected) | No Data Available | ||
| 155 | 0.84 seconds | Electron Capture | 100.00% |
| 156 | 23 milliseconds | Alpha Decay | 100.00% |
| 156m | 0.52 milliseconds | Alpha Decay | 100.00% |
| 157 | 110 milliseconds | Alpha Decay | 86.00% |
| Electron Capture | 14.00% | ||
| 158 | 2.85 seconds | Alpha Decay | 44.30% |
| Electron Capture | 55.70% | ||
| 159 | 5.6 seconds | Electron Capture | 65.00% |
| Alpha Decay | 35.00% | ||
| 160 | 13.6 seconds | Electron Capture | 99.30% |
| Alpha Decay | 0.70% | ||
| 161 | 18.2 seconds | Electron Capture | > 99.87% |
| Alpha Decay | < 0.13% | ||
| 162 | 39.4 seconds | Electron Capture | 99.99% |
| Alpha Decay | 8.0×10-3 % | ||
| 163 | 40.0 seconds | Electron Capture | 100.00% |
| Alpha Decay | < 1.0×10-4 % | ||
| 164 | 111 seconds | Electron Capture | 100.00% |
| 165 | 76 seconds | Electron Capture | 100.00% |
| 166 | 6.77 minutes | Electron Capture | 100.00% |
| 167 | 2.05 minutes | Electron Capture | 100.00% |
| 168 | 25.95 minutes | Electron Capture | 100.00% |
| 169 | 3.24 minutes | Electron Capture | 100.00% |
| 170 | 16.01 hours | Electron Capture | 100.00% |
| 171 | 12.1 hours | Electron Capture | 100.00% |
| 171m | 29.5 seconds | Isomeric Transition | <= 100.00% |
| Electron Capture | No Data Available | ||
| 172 | 1.87 years | Electron Capture | 100.00% |
| 173 | 23.6 hours | Electron Capture | 100.00% |
| 174 | 2.0×10+15 years | Alpha Decay | 100.00% |
| 175 | 70 days | Electron Capture | 100.00% |
| 176 | STABLE | - | - |
| 177 | STABLE | - | - |
| 177m | 1.09 seconds | Isomeric Transition | 100.00% |
| 177m1 | 51.4 minutes | Isomeric Transition | 100.00% |
| 178 | STABLE | - | - |
| 178m | 4.0 seconds | Isomeric Transition | 100.00% |
| 178m1 | 31 years | Isomeric Transition | 100.00% |
| 179 | STABLE | - | - |
| 179m | 18.67 seconds | Isomeric Transition | 100.00% |
| 179m1 | 25.05 days | Isomeric Transition | 100.00% |
| 180 | STABLE | - | - |
| 180m | 5.47 hours | Isomeric Transition | 99.70% |
| Beta-minus Decay | 0.30% | ||
| 181 | 42.39 days | Beta-minus Decay | 100.00% |
| 181m | 1.5 milliseconds | Isomeric Transition | 100.00% |
| 182 | 8.90×10+6 years | Beta-minus Decay | 100.00% |
| 182m | 61.5 minutes | Beta-minus Decay | 54.00% |
| Isomeric Transition | 46.00% | ||
| 183 | 1.018 hours | Beta-minus Decay | 100.00% |
| 184 | 4.12 hours | Beta-minus Decay | 100.00% |
| 184m | 48 seconds | Isomeric Transition | 100.00% |
| 185 | 3.5 minutes | Beta-minus Decay | 100.00% |
| 186 | 2.6 minutes | Beta-minus Decay | 100.00% |
| 187 | 0.27 microseconds | Beta-minus Decay | 100.00% |
| 188 | No Data Available | Beta-minus Decay | No Data Available |
| 189 | No Data Available | No Data Available | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.