It's Elemental
Isotopes of the Element Tantalum
Tantalum
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 |
| 180 | 0.01201% | > 1.2×10+15 years |
| 180 | 0.01201% | 1.2×10+15 years |
| 181 | 99.98799% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 155 | 2.9 milliseconds | Proton Emission | 100.00% |
| 156 | 144 milliseconds | Electron Capture | No Data Available |
| Proton Emission | 100.00% | ||
| 156m | 0.36 seconds | Electron Capture | 95.80% |
| Proton Emission | 4.20% | ||
| 157 | 10.1 milliseconds | Alpha Decay | 96.60% |
| Proton Emission | 3.40% | ||
| 157m | 4.3 milliseconds | Alpha Decay | 100.00% |
| 157m1 | 1.7 milliseconds | Alpha Decay | 100.00% |
| 158 | 55 milliseconds | Alpha Decay | ~ 91.00% |
| Electron Capture | ~ 9.00% | ||
| 158m | 36.7 milliseconds | Alpha Decay | 95.00% |
| Electron Capture | 5.00% | ||
| 159 | 0.83 seconds | Electron Capture | 66.00% |
| Alpha Decay | 34.00% | ||
| 159m | 0.56 seconds | Alpha Decay | 55.00% |
| Electron Capture | 45.00% | ||
| 160 | 1.55 seconds | Electron Capture | 66.00% |
| Alpha Decay | 34.00% | ||
| 160m | 1.7 seconds | No Data Available | No Data Available |
| 161 | No Data Available | Electron Capture | No Data Available |
| Alpha Decay | No Data Available | ||
| 161m | 3.08 seconds | Electron Capture | No Data Available |
| Alpha Decay | No Data Available | ||
| 162 | 3.57 seconds | Electron Capture | 99.93% |
| Alpha Decay | 0.07% | ||
| 163 | 10.6 seconds | Electron Capture | ~ 99.80% |
| Alpha Decay | ~ 0.20% | ||
| 164 | 14.2 seconds | Electron Capture | 100.00% |
| 165 | 31.0 seconds | Electron Capture | 100.00% |
| 166 | 34.4 seconds | Electron Capture | 100.00% |
| 167 | 80 seconds | Electron Capture | 100.00% |
| 168 | 2.0 minutes | Electron Capture | 100.00% |
| 169 | 4.9 minutes | Electron Capture | 100.00% |
| 170 | 6.76 minutes | Electron Capture | 100.00% |
| 171 | 23.3 minutes | Electron Capture | 100.00% |
| 172 | 36.8 minutes | Electron Capture | 100.00% |
| 173 | 3.14 hours | Electron Capture | 100.00% |
| 174 | 1.14 hours | Electron Capture | 100.00% |
| 175 | 10.5 hours | Electron Capture | 100.00% |
| 176 | 8.09 hours | Electron Capture | 100.00% |
| 177 | 56.56 hours | Electron Capture | 100.00% |
| 178 | 9.31 minutes | Electron Capture | 100.00% |
| 178m | 2.36 hours | Electron Capture | 100.00% |
| 178m1 | 58 milliseconds | Isomeric Transition | 100.00% |
| 178m2 | 290 milliseconds | Isomeric Transition | 100.00% |
| 179 | 1.82 years | Electron Capture | 100.00% |
| 179m | 9.0 milliseconds | Isomeric Transition | 100.00% |
| 179m1 | 54.1 milliseconds | Isomeric Transition | 100.00% |
| 180 | 8.154 hours | Electron Capture | 86.00% |
| Beta-minus Decay | 14.00% | ||
| 180m | 1.2×10+15 years | Electron Capture (suspected) | No Data Available |
| 180m1 | > 1.2×10+15 years | Beta-minus Decay (suspected) | No Data Available |
| 181 | STABLE | - | - |
| 182 | 114.74 days | Beta-minus Decay | 100.00% |
| 182m | 283 milliseconds | Isomeric Transition | 100.00% |
| 182m1 | 15.84 minutes | Isomeric Transition | 100.00% |
| 183 | 5.1 days | Beta-minus Decay | 100.00% |
| 184 | 8.7 hours | Beta-minus Decay | 100.00% |
| 185 | 49.4 minutes | Beta-minus Decay | 100.00% |
| 185m | > 1 milliseconds | No Data Available | No Data Available |
| 186 | 10.5 minutes | Beta-minus Decay | 100.00% |
| 186m | 1.54 minutes | Beta-minus Decay | 100.00% |
| 187 | 2.3 minutes | Beta-minus Decay | 100.00% |
| 187m | 22 seconds | Beta-minus Decay (suspected) | No Data Available |
| Isomeric Transition (suspected) | No Data Available | ||
| 187m1 | > 5 minutes | Beta-minus Decay (suspected) | No Data Available |
| 187m2 | 5 minutes | Isomeric Transition (suspected) | No Data Available |
| 188 | 19.6 seconds | Beta-minus Decay | No Data Available |
| 189 | 1.6 microseconds | Beta-minus Decay (suspected) | No Data Available |
| 190 | 5.3 seconds | Beta-minus Decay | 100.00% |
| 191 | > 300 nanoseconds | Beta-minus Decay (suspected) | No Data Available |
| 192 | 2.2 seconds | Beta-minus Decay | 100.00% |
Citation and linking information
For questions about this page, please contact Carol McKisson.