It's Elemental
Isotopes of the Element Krypton
Krypton
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 |
| 78 | 0.355% | >= 1.5×10+21 years |
| 80 | 2.286% | STABLE |
| 82 | 11.593% | STABLE |
| 83 | 11.500% | STABLE |
| 84 | 56.987% | STABLE |
| 86 | 17.279% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 69 | 32 milliseconds | Electron Capture | 100.00% |
| 70 | 52 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | <= 1.30% | ||
| 71 | 100 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 2.10% | ||
| 72 | 17.1 seconds | Electron Capture with delayed Proton Emission | < 1.0×10-6 % |
| Electron Capture | 100.00% | ||
| 73 | 27.3 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 0.25% | ||
| 74 | 11.50 minutes | Electron Capture | 100.00% |
| 75 | 4.29 minutes | Electron Capture | 100.00% |
| 76 | 14.8 hours | Electron Capture | 100.00% |
| 77 | 74.4 minutes | Electron Capture | 100.00% |
| 78 | >= 1.5×10+21 years | Double Electron Capture | No Data Available |
| 79 | 35.04 hours | Electron Capture | 100.00% |
| 79m | 50 seconds | Isomeric Transition | 100.00% |
| 80 | STABLE | - | - |
| 81 | 2.29×10+5 years | Electron Capture | 100.00% |
| 81m | 13.10 seconds | Isomeric Transition | 100.00% |
| Electron Capture | 2.5×10-3 % | ||
| 82 | STABLE | - | - |
| 83 | STABLE | - | - |
| 83m | 1.85 hours | Isomeric Transition | 100.00% |
| 84 | STABLE | - | - |
| 85 | 10.752 years | Beta-minus Decay | 100.00% |
| 85m | 4.480 hours | Beta-minus Decay | 78.60% |
| Isomeric Transition | 21.40% | ||
| 86 | STABLE | - | - |
| 87 | 76.3 minutes | Beta-minus Decay | 100.00% |
| 88 | 2.84 hours | Beta-minus Decay | 100.00% |
| 89 | 3.15 minutes | Beta-minus Decay | 100.00% |
| 90 | 32.32 seconds | Beta-minus Decay | 100.00% |
| 91 | 8.57 seconds | Beta-minus Decay | 100.00% |
| 92 | 1.840 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 0.03% | ||
| 93 | 1.286 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 1.95% | ||
| 94 | 212 milliseconds | Beta-minus Decay with delayed Neutron Emission | 1.11% |
| Beta-minus Decay | 100.00% | ||
| 95 | 0.114 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 2.87% | ||
| 96 | 80 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 3.70% | ||
| 97 | 63 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 6.70% | ||
| 98 | 46 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 7.00% | ||
| 99 | 13 milliseconds | Beta-minus Decay with delayed Neutron Emission | 11.00% |
| Beta-minus Decay | 100.00% | ||
| 100 | 7 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 101 | > 635 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.