It's Elemental
Isotopes of the Element Rubidium
Rubidium
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 |
| 85 | 72.17% | STABLE |
| 87 | 27.83% | 4.81×10+10 years |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 71 | No Data Available | Proton Emission (suspected) | No Data Available |
| 72 | 1.2 microseconds | Proton Emission (suspected) | No Data Available |
| 73 | 30 nanoseconds | Electron Capture (suspected) | No Data Available |
| 73m | < 30 nanoseconds | Proton Emission | > 0.00% |
| 74 | 64.9 milliseconds | Electron Capture | 100.00% |
| 75 | 19.0 seconds | Electron Capture | 100.00% |
| 76 | 36.5 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Alpha Decay | 3.8×10-7 % | ||
| 77 | 3.77 minutes | Electron Capture | 100.00% |
| 78 | 17.66 minutes | Electron Capture | 100.00% |
| 78m | 5.74 minutes | Isomeric Transition | 9.00% |
| Electron Capture | 91.00% | ||
| 79 | 22.9 minutes | Electron Capture | 100.00% |
| 80 | 33.4 seconds | Electron Capture | 100.00% |
| 81 | 4.572 hours | Electron Capture | 100.00% |
| 81m | 30.5 minutes | Isomeric Transition | 97.60% |
| Electron Capture | 2.40% | ||
| 82 | 1.2575 minutes | Electron Capture | 100.00% |
| 82m | 6.472 hours | Electron Capture | 100.00% |
| Isomeric Transition | < 0.33% | ||
| 83 | 86.2 days | Electron Capture | 100.00% |
| 84 | 32.82 days | Beta-minus Decay | 3.90% |
| Electron Capture | 96.10% | ||
| 84m | 20.26 minutes | Isomeric Transition | 100.00% |
| 85 | STABLE | - | - |
| 86 | 18.642 days | Beta-minus Decay | 99.99% |
| Electron Capture | 5.2×10-3 % | ||
| 86m | 1.017 minutes | Isomeric Transition | 100.00% |
| Beta-minus Decay | < 0.30% | ||
| 87 | 4.81×10+10 years | Beta-minus Decay | 100.00% |
| 88 | 17.773 minutes | Beta-minus Decay | 100.00% |
| 89 | 15.15 minutes | Beta-minus Decay | 100.00% |
| 90 | 158 seconds | Beta-minus Decay | 100.00% |
| 90m | 258 seconds | Beta-minus Decay | 97.40% |
| Isomeric Transition | 2.60% | ||
| 91 | 58.4 seconds | Beta-minus Decay | 100.00% |
| 92 | 4.492 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.01% | ||
| 93 | 5.84 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 1.39% | ||
| 94 | 2.702 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 10.50% | ||
| 95 | 377.7 milliseconds | Beta-minus Decay with delayed Neutron Emission | 8.70% |
| Beta-minus Decay | 100.00% | ||
| 96 | 203 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 13.30% | ||
| 97 | 169.1 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 25.50% | ||
| 98 | 102 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 13.80% | ||
| Beta-minus Decay with delayed Double Neutron Emission | 0.05% | ||
| 98m | 96 milliseconds | Beta-minus Decay | 100.00% |
| 99 | 54 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 15.80% | ||
| 100 | 51 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 6.00% | ||
| Beta-minus Decay with delayed Double Neutron Emission | 0.16% | ||
| 101 | 32 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 28.00% | ||
| 102 | 37 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 18.00% | ||
| 103 | > 633 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.