It's Elemental
Isotopes of the Element Iron
Iron
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 |
| 54 | 5.845% | STABLE |
| 56 | 91.754% | STABLE |
| 57 | 2.119% | STABLE |
| 58 | 0.282% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 45 | 1.89 milliseconds | Double Proton Emission | 70.00% |
| Electron Capture | <= 30.00% | ||
| Electron Capture with delayed Proton Emission | 19.00% | ||
| Electron Capture with delayed Double Proton Emission | 7.80% | ||
| Electron Capture with delayed Triple Proton Emission | 3.30% | ||
| 46 | 13.0 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 78.70% | ||
| 47 | 21.9 milliseconds | Electron Capture with delayed Proton Emission | 88.4% |
| Electron Capture with delayed Double Proton Emission | No Data Available | ||
| Electron Capture | 100.00% | ||
| 48 | 45.3 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 15.90% | ||
| 49 | 64.7 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 56.70% | ||
| 50 | 155 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission (suspected) | No Data Available | ||
| 51 | 305 milliseconds | Electron Capture | 100.00% |
| 52 | 8.275 hours | Electron Capture | 100.00% |
| 52m | 45.9 seconds | Isomeric Transition | < 4.0×10-3 % |
| Electron Capture | 100.00% | ||
| 53 | 8.51 minutes | Electron Capture | 100.00% |
| 53m | 2.54 minutes | Isomeric Transition | 100.00% |
| 54 | STABLE | - | - |
| 55 | 2.744 years | Electron Capture | 100.00% |
| 56 | STABLE | - | - |
| 57 | STABLE | - | - |
| 58 | STABLE | - | - |
| 59 | 44.495 days | Beta-minus Decay | 100.00% |
| 60 | 2.62×10+6 years | Beta-minus Decay | 100.00% |
| 61 | 5.98 minutes | Beta-minus Decay | 100.00% |
| 62 | 68 seconds | Beta-minus Decay | 100.00% |
| 63 | 6.1 seconds | Beta-minus Decay | 100.00% |
| 64 | 2.0 seconds | Beta-minus Decay | 100.00% |
| 65 | 0.81 seconds | Beta-minus Decay | 100.00% |
| 65m | 1.12 seconds | Beta-minus Decay | 100.00% |
| 66 | 440 milliseconds | Beta-minus Decay | 100.00% |
| 67 | 0.40 seconds | Beta-minus Decay | 100.00% |
| 68 | 180 milliseconds | Beta-minus Decay | 100.00% |
| 69 | 110 milliseconds | Beta-minus Decay | 100.00% |
| 70 | 71 milliseconds | Beta-minus Decay | 100.00% |
| 71 | 28 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 72 | >= 150 nanoseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 27.60% | ||
| 73 | > 633 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| Beta-minus Decay with delayed Double Neutron Emission | No Data Available | ||
| 74 | > 638 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| Beta-minus Decay with delayed Double Neutron Emission | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.