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 |
133 | 100% | STABLE |
Known Isotopes
Mass Number | Half-life | Decay Mode | Branching Percentage |
112 | 0.5 milliseconds | Proton Emission | 100.00% |
113 | 16.7 microseconds | Proton Emission | 100.00% |
Alpha Decay | No Data Available | ||
114 | 0.57 seconds | Electron Capture | 99.98% |
Electron Capture with delayed Proton Emission | 8.70% | ||
Electron Capture with delayed Alpha Decay | 0.19% | ||
Alpha Decay | 0.02% | ||
115 | 1.4 seconds | Electron Capture | 100.00% |
Electron Capture with delayed Proton Emission | ~ 0.07% | ||
116 | 0.70 seconds | Electron Capture | 100.00% |
Electron Capture with delayed Proton Emission | 2.80% | ||
Electron Capture with delayed Alpha Decay | 0.05% | ||
116m | 3.85 seconds | Electron Capture | 100.00% |
Electron Capture with delayed Proton Emission | 0.51% | ||
Electron Capture with delayed Alpha Decay | 8.0×10-3 % | ||
117 | 8.4 seconds | Electron Capture | 100.00% |
117m | 6.5 seconds | Electron Capture | No Data Available |
118 | 14 seconds | Electron Capture | 100.00% |
Electron Capture with delayed Proton Emission | < 0.04% | ||
Electron Capture with delayed Alpha Decay | < 2.4×10-3 % | ||
118m | 17 seconds | Electron Capture | 100.00% |
Electron Capture with delayed Proton Emission | < 0.04% | ||
Electron Capture with delayed Alpha Decay | < 2.4×10-3 % | ||
119 | 43.0 seconds | Electron Capture | 100.00% |
119m | 30.4 seconds | Electron Capture | 100.00% |
120 | 61.3 seconds | Electron Capture | 100.00% |
Electron Capture with delayed Alpha Decay | 2.0×10-5 % | ||
Electron Capture with delayed Proton Emission | 7.0×10-6 % | ||
120m | 57 seconds | Electron Capture | 100.00% |
121 | 155 seconds | Electron Capture | 100.00% |
121m | 122 seconds | Isomeric Transition | 17.00% |
Electron Capture | 83.00% | ||
122 | 21.18 seconds | Electron Capture | 100.00% |
122m | 0.36 seconds | Isomeric Transition | 100.00% |
122m1 | 3.70 minutes | Electron Capture | 100.00% |
123 | 5.88 minutes | Electron Capture | 100.00% |
123m | 1.64 seconds | Isomeric Transition | 100.00% |
124 | 30.9 seconds | Electron Capture | 100.00% |
124m | 6.3 seconds | Isomeric Transition | 100.00% |
125 | 46.7 minutes | Electron Capture | 100.00% |
125m | 0.90 milliseconds | Isomeric Transition | 100.00% |
126 | 1.64 minutes | Electron Capture | 100.00% |
127 | 6.25 hours | Electron Capture | 100.00% |
128 | 3.66 minutes | Electron Capture | 100.00% |
129 | 32.06 hours | Electron Capture | 100.00% |
130 | 29.21 minutes | Electron Capture | 98.40% |
Beta-minus Decay | 1.60% | ||
130m | 3.46 minutes | Isomeric Transition | 99.84% |
Electron Capture | 0.16% | ||
131 | 9.689 days | Electron Capture | 100.00% |
132 | 6.480 days | Electron Capture | 98.13% |
Beta-minus Decay | 1.87% | ||
133 | STABLE | - | - |
134 | 2.0652 years | Beta-minus Decay | 100.00% |
Electron Capture | 3.0×10-4 % | ||
134m | 2.912 hours | Isomeric Transition | 100.00% |
135 | 2.3×10+6 years | Beta-minus Decay | 100.00% |
135m | 53 minutes | Isomeric Transition | 100.00% |
136 | 13.04 days | Beta-minus Decay | 100.00% |
136m | 17.5 seconds | Beta-minus Decay | No Data Available |
Isomeric Transition | > 0.00% | ||
137 | 30.08 years | Beta-minus Decay | 100.00% |
138 | 33.41 minutes | Beta-minus Decay | 100.00% |
138m | 2.91 minutes | Isomeric Transition | 81.00% |
Beta-minus Decay | 19.00% | ||
139 | 9.27 minutes | Beta-minus Decay | 100.00% |
140 | 63.7 seconds | Beta-minus Decay | 100.00% |
141 | 24.84 seconds | Beta-minus Decay | 100.00% |
Beta-minus Decay with delayed Neutron Emission | 0.04% | ||
142 | 1.684 seconds | Beta-minus Decay | 100.00% |
Beta-minus Decay with delayed Neutron Emission | 0.09% | ||
143 | 1.791 seconds | Beta-minus Decay | 100.00% |
Beta-minus Decay with delayed Neutron Emission | 1.64% | ||
144 | 0.994 seconds | Beta-minus Decay | 100.00% |
Beta-minus Decay with delayed Neutron Emission | 3.03% | ||
144m | < 1 seconds | Beta-minus Decay | No Data Available |
145 | 0.587 seconds | Beta-minus Decay | 100.00% |
Beta-minus Decay with delayed Neutron Emission | 14.70% | ||
146 | 0.321 seconds | Beta-minus Decay | 100.00% |
Beta-minus Decay with delayed Neutron Emission | 14.20% | ||
147 | 0.230 seconds | Beta-minus Decay | 100.00% |
Beta-minus Decay with delayed Neutron Emission | 28.50% | ||
148 | 146 milliseconds | Beta-minus Decay | 100.00% |
Beta-minus Decay with delayed Neutron Emission | 25.10% | ||
149 | > 50 milliseconds | Beta-minus Decay | No Data Available |
Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
150 | > 50 milliseconds | Beta-minus Decay | No Data Available |
Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
151 | > 50 milliseconds | Beta-minus Decay | No Data Available |
Beta-minus Decay with delayed Neutron Emission | No Data Available |
This page is maintained by Steve Gagnon.