It's Elemental
Isotopes of the Element Praseodymium
Praseodymium
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 |
| 141 | 100% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 121 | 10 milliseconds | Proton Emission | 100.00% |
| 122 | 0.5 seconds | Electron Capture (suspected) | No Data Available |
| 123 | 0.8 seconds | Electron Capture (suspected) | No Data Available |
| 124 | 1.2 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | > 0.00% | ||
| 125 | 3.3 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 126 | 3.14 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 127 | 4.2 seconds | Electron Capture | 100.00% |
| 128 | 2.84 seconds | Electron Capture | 100.00% |
| 129 | 30 seconds | Electron Capture | > 0.00% |
| 130 | 40 seconds | Electron Capture | 100.00% |
| Electron Capture | 100.00% | ||
| Electron Capture | 100.00% | ||
| 131 | 1.51 minutes | Electron Capture | 100.00% |
| 131m | 5.73 seconds | Isomeric Transition | 96.40% |
| Electron Capture | 3.60% | ||
| 132 | 1.6 minutes | Electron Capture | 100.00% |
| 133 | 6.5 minutes | Electron Capture | 100.00% |
| 133m | 1.1 seconds | Isomeric Transition | 100.00% |
| 134 | ≈ 11 minutes | Electron Capture | 100.00% |
| 134m | 17 minutes | Electron Capture | 100.00% |
| 135 | 24 minutes | Electron Capture | 100.00% |
| 136 | 13.1 minutes | Electron Capture | 100.00% |
| 137 | 1.28 hours | Electron Capture | 100.00% |
| 138 | 1.45 minutes | Electron Capture | 100.00% |
| 138m | 2.12 hours | Electron Capture | 100.00% |
| 139 | 4.41 hours | Electron Capture | 100.00% |
| 140 | 3.39 minutes | Electron Capture | 100.00% |
| 141 | STABLE | - | - |
| 142 | 19.12 hours | Beta-minus Decay | 99.98% |
| Electron Capture | 0.02% | ||
| 142m | 14.6 minutes | Isomeric Transition | 100.00% |
| 143 | 13.57 days | Beta-minus Decay | 100.00% |
| 144 | 17.28 minutes | Beta-minus Decay | 100.00% |
| 144m | 7.2 minutes | Isomeric Transition | 99.93% |
| Beta-minus Decay | 0.07% | ||
| 145 | 5.984 hours | Beta-minus Decay | 100.00% |
| 146 | 24.15 minutes | Beta-minus Decay | 100.00% |
| 147 | 13.4 minutes | Beta-minus Decay | 100.00% |
| 148 | 2.29 minutes | Beta-minus Decay | 100.00% |
| 148m | 2.01 minutes | Beta-minus Decay | 100.00% |
| 149 | 2.26 minutes | Beta-minus Decay | 100.00% |
| 150 | 6.19 seconds | Beta-minus Decay | 100.00% |
| 151 | 18.90 seconds | Beta-minus Decay | 100.00% |
| 152 | 3.57 seconds | Beta-minus Decay | 100.00% |
| 153 | 4.28 seconds | Beta-minus Decay | 100.00% |
| 154 | 2.3 seconds | Beta-minus Decay | 100.00% |
| 155 | > 300 nanoseconds | Beta-minus Decay (suspected) | No Data Available |
| 156 | > 300 nanoseconds | Beta-minus Decay (suspected) | No Data Available |
| 157 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 158 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 159 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
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