It's Elemental
Isotopes of the Element Ruthenium
Ruthenium
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 |
| 96 | 5.54% | STABLE |
| 98 | 1.87% | STABLE |
| 99 | 12.76% | STABLE |
| 100 | 12.60% | STABLE |
| 101 | 17.06% | STABLE |
| 102 | 31.55% | STABLE |
| 104 | 18.62% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 87 | 1.5 microseconds | Electron Capture (suspected) | No Data Available |
| 88 | 1.2 seconds | Electron Capture | 100.00% |
| 89 | 1.5 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | < 0.15% | ||
| 90 | 11.7 seconds | Electron Capture | 100.00% |
| 91 | 7.9 seconds | Electron Capture | 100.00% |
| 91m | 7.6 seconds | Isomeric Transition | No Data Available |
| Electron Capture | > 0.00% | ||
| Electron Capture with delayed Proton Emission | > 0.00% | ||
| 92 | 3.65 minutes | Electron Capture | 100.00% |
| 93 | 59.7 seconds | Electron Capture | 100.00% |
| 93m | 10.8 seconds | Electron Capture | 78.00% |
| Isomeric Transition | 22.00% | ||
| Electron Capture with delayed Proton Emission | 0.03% | ||
| 94 | 51.8 minutes | Electron Capture | 100.00% |
| 95 | 1.643 hours | Electron Capture | 100.00% |
| 96 | STABLE | - | - |
| 97 | 2.83 days | Electron Capture | 100.00% |
| 98 | STABLE | - | - |
| 99 | STABLE | - | - |
| 100 | STABLE | - | - |
| 101 | STABLE | - | - |
| 102 | STABLE | - | - |
| 103 | 39.247 days | Beta-minus Decay | 100.00% |
| 104 | STABLE | - | - |
| 105 | 4.44 hours | Beta-minus Decay | 100.00% |
| 106 | 371.8 days | Beta-minus Decay | 100.00% |
| 107 | 3.75 minutes | Beta-minus Decay | 100.00% |
| 108 | 4.55 minutes | Beta-minus Decay | 100.00% |
| 109 | 34.5 seconds | Beta-minus Decay | 100.00% |
| 110 | 11.6 seconds | Beta-minus Decay | 100.00% |
| 111 | 2.12 seconds | Beta-minus Decay | 100.00% |
| 112 | 1.75 seconds | Beta-minus Decay | 100.00% |
| 113 | 0.80 seconds | Beta-minus Decay | 100.00% |
| 113m | 510 milliseconds | Beta-minus Decay | 100.00% |
| 114 | 0.52 seconds | Beta-minus Decay | 100.00% |
| 115 | 318 milliseconds | Beta-minus Decay | No Data Available |
| 115m | 740 milliseconds | Beta-minus Decay with delayed Neutron Emission | No Data Available |
| Beta-minus Decay | 100.00% | ||
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| Beta-minus Decay | 100.00% | ||
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| Beta-minus Decay | 100.00% | ||
| 116 | 204 milliseconds | Beta-minus Decay | No Data Available |
| 117 | 142 milliseconds | Beta-minus Decay | 100.00% |
| 118 | 123 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 119 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 120 | > 150 nanoseconds | Beta-minus Decay | No Data Available |
| 121 | > 390 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 122 | > 392 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 123 | > 394 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 | ||
| 124 | > 396 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.