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 |
This page is maintained by Steve Gagnon.