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 |
174 | 0.16% | 2.0×10+15 years |
176 | 5.26% | STABLE |
177 | 18.60% | STABLE |
178 | 27.28% | STABLE |
179 | 13.62% | STABLE |
180 | 35.08% | STABLE |
Known Isotopes
Mass Number | Half-life | Decay Mode | Branching Percentage |
153 | 60 nanoseconds | Electron Capture (suspected) | No Data Available |
154 | 2 seconds | Electron Capture | 100.00% |
Alpha Decay (suspected) | No Data Available | ||
155 | 0.84 seconds | Electron Capture | 100.00% |
156 | 23 milliseconds | Alpha Decay | 100.00% |
156m | 0.52 milliseconds | Alpha Decay | 100.00% |
157 | 110 milliseconds | Alpha Decay | 86.00% |
Electron Capture | 14.00% | ||
158 | 2.85 seconds | Alpha Decay | 44.30% |
Electron Capture | 55.70% | ||
159 | 5.6 seconds | Electron Capture | 65.00% |
Alpha Decay | 35.00% | ||
160 | 13.6 seconds | Electron Capture | 99.30% |
Alpha Decay | 0.70% | ||
161 | 18.2 seconds | Electron Capture | > 99.87% |
Alpha Decay | < 0.13% | ||
162 | 39.4 seconds | Electron Capture | 99.99% |
Alpha Decay | 8.0×10-3 % | ||
163 | 40.0 seconds | Electron Capture | 100.00% |
Alpha Decay | < 1.0×10-4 % | ||
164 | 111 seconds | Electron Capture | 100.00% |
165 | 76 seconds | Electron Capture | 100.00% |
166 | 6.77 minutes | Electron Capture | 100.00% |
167 | 2.05 minutes | Electron Capture | 100.00% |
168 | 25.95 minutes | Electron Capture | 100.00% |
169 | 3.24 minutes | Electron Capture | 100.00% |
170 | 16.01 hours | Electron Capture | 100.00% |
171 | 12.1 hours | Electron Capture | 100.00% |
171m | 29.5 seconds | Isomeric Transition | <= 100.00% |
Electron Capture | No Data Available | ||
172 | 1.87 years | Electron Capture | 100.00% |
173 | 23.6 hours | Electron Capture | 100.00% |
174 | 2.0×10+15 years | Alpha Decay | 100.00% |
175 | 70 days | Electron Capture | 100.00% |
176 | STABLE | - | - |
177 | STABLE | - | - |
177m | 1.09 seconds | Isomeric Transition | 100.00% |
177m1 | 51.4 minutes | Isomeric Transition | 100.00% |
178 | STABLE | - | - |
178m | 4.0 seconds | Isomeric Transition | 100.00% |
178m1 | 31 years | Isomeric Transition | 100.00% |
179 | STABLE | - | - |
179m | 18.67 seconds | Isomeric Transition | 100.00% |
179m1 | 25.05 days | Isomeric Transition | 100.00% |
180 | STABLE | - | - |
180m | 5.47 hours | Isomeric Transition | 99.70% |
Beta-minus Decay | 0.30% | ||
181 | 42.39 days | Beta-minus Decay | 100.00% |
181m | 1.5 milliseconds | Isomeric Transition | 100.00% |
182 | 8.90×10+6 years | Beta-minus Decay | 100.00% |
182m | 61.5 minutes | Beta-minus Decay | 54.00% |
Isomeric Transition | 46.00% | ||
183 | 1.018 hours | Beta-minus Decay | 100.00% |
184 | 4.12 hours | Beta-minus Decay | 100.00% |
184m | 48 seconds | Isomeric Transition | 100.00% |
185 | 3.5 minutes | Beta-minus Decay | 100.00% |
186 | 2.6 minutes | Beta-minus Decay | 100.00% |
187 | 0.27 microseconds | Beta-minus Decay | 100.00% |
188 | No Data Available | Beta-minus Decay | No Data Available |
189 | No Data Available | No Data Available | No Data Available |
This page is maintained by Steve Gagnon.