| Nuc- lide | Atomic Mass | NN | Abun % | Spin | Half Life | DM | DT | BR % | Decay Energy (MeV) |
|---|---|---|---|---|---|---|---|---|---|
| Ac206 | 117 | Syn | 3+ | 22ms | α | ||||
| meta state | Syn | 10- | 33ms | ||||||
| Ac207 | 118 | Syn | 9/2- | 22ms | |||||
| Ac208 | 119 | Syn | 3+ | 95ms | |||||
| Ac209 | 209.001 | 120 | Syn | 9/2- | 0.10s | α | Fr205 | ~99 | 7.730 |
| 0.10s | ε | Ra209 | ~1 | 7.110 | |||||
| Ac210 | 210.009 | 121 | Syn | 0.35s | α | Fr206 | ~96 | 7.610 | |
| 0.35s | ε | Ra210 | ~4 | 8.200 | |||||
| Ac211 | 211.008 | 122 | Syn | 0.25s | α | Fr207 | ~100 | 7.620 | |
| Ac212 | 212.0078 | 123 | Syn | 0.93s | α | Fr208 | ~97 | 7.520 | |
| 0.93s | ε | Ra212 | ~3 | 7.480 | |||||
| Ac213 | 213.0066 | 124 | Syn | 0.80s | α | Fr209 | <=100 | 7.500 | |
| Ac214 | 214.007 | 125 | Syn | 8.2s | α | Fr210 | >=89 | 7.350 | |
| 8.2s | ε | Ra214 | <=11 | 6.340 | |||||
| Ac215 | 215.0065 | 126 | Syn | 9/2- | 0.17s | α | Fr211 | 99.91 | 7.750 |
| 0.17s | ε | Ra215 | 0.09 | 3.490 | |||||
| Ac216 | 216.0087 | 127 | Syn | 1- | ~0.33ms | α | Fr212 | 9.243 | |
| meta state 0.037MeV | Syn | 9- | 0.33ms | α | Fr212 | 9.280 | |||
| Ac217 | 217.0093 | 128 | Syn | 9/2- | 69ns | ε | Ra217 | <=2 | 2.819 |
| 69ns | α | Fr213 | 9.832 | ||||||
| Ac218 | 218.0116 | 129 | Syn | 1- | 1.08us | α | Fr214 | 9.380 | |
| Ac219 | 219.0124 | 130 | Syn | 9/2- | 11.8us | α | Fr215 | 8.830 | |
| Ac220 | 220.0148 | 131 | Syn | 3- | 26.4ms | ε | Ra220 | 0.00050 | 3.480 |
| 26.4ms | α | Fr216 | 8.350 | ||||||
| Ac221 | 221.0156 | 132 | Syn | 3/2- | 52ms | α | Fr217 | 7.780 | |
| Ac222 | 222.0178 | 133 | Syn | 1- | 5s | α | Fr218 | 99 | 7.137 |
| 5s | ε | Ra222 | 1 | 2.298 | |||||
| meta state 0.000MeV | Syn | 63s | α | Fr218 | >=88 | 7.137 | |||
| 63s | IT | Ac222 | <=10 | ||||||
| 63s | ε | Ra222 | >=0.70 | 2.298 | |||||
| Ac223 | 223.0191 | 134 | Syn | 5/2- | 2.10m | α | Fr219 | 99 | 6.783 |
| 2.10m | ε | Ra223 | 1 | 0.586 | |||||
| Ac224 | 224.0217 | 135 | Syn | 0- | 2.78h | ε | Ra224 | 90.90 | 1.403 |
| 2.78h | α | Fr220 | 9.10 | 6.327 | |||||
| 2.78h | β- | Th224 | <1.60 | 0.232 | |||||
| Ac225 | 225.0232 | 136 | Syn | 3/2- | 10d | α | Fr221 | 5.935 | |
| Ac226 | 226.0261 | 137 | Syn | 1 | 29.37h | β- | Th226 | 83 | 1.117 |
| 29.37h | ε | Ra226 | 17 | 0.640 | |||||
| 29.37h | α | Fr222 | 0.0060 | 5.536 | |||||
| Ac227 | 227.0278 | 138 | 100. | 3/2- | 21.773y | β- | Th227 | 98.62 | 0.045 |
| 21.773y | α | Fr223 | 1.38 | 5.042 | |||||
| Ac228 | 228.031 | 139 | Syn | 3+ | 6.15h | β- | Th228 | 2.127 | |
| Ac229 | 229.0329 | 140 | Syn | 3/2+ | 62.7m | β- | Th229 | 1.100 | |
| Ac230 | 230.036 | 141 | Syn | 1+ | 122s | β- | Th230 | 2.700 | |
| Ac231 | 231.039 | 142 | Syn | 1/2+ | 7.5m | β- | Th231 | 2.100 | |
| Ac232 | 232.042 | 143 | Syn | 1+ | 119s | β- | Th232 | 3.700 | |
| Ac233 | 233.045 | 144 | Syn | 1/2+ | 145s | β- | Th233 | ||
| Ac234 | 234.048 | 145 | Syn | 44s | β- | Th234 | |||
| Ac235 | 146 | Syn | |||||||
| Ac236 | 147 | Syn | |||||||
| Nuclide | Potential Parent Nuclides |
|---|---|
| Ac206 | None known |
| meta state | None known |
| Ac207 | None known |
| Ac208 | None known |
| Ac209 | None known |
| Ac210 | None known |
| Ac211 | Pa215 (Syn) |
| Ac212 | Pa216 (Syn) Th212 (Syn) |
| Ac213 | Pa217 (Syn) Pa217m (Syn) |
| Ac214 | Pa218 (Syn) |
| Ac215 | Pa219 (Syn) |
| Ac216 | Pa220 (Syn) Th216 (Syn) |
| meta state 0.037MeV | None known |
| Ac217 | Pa221 (Syn) |
| Ac218 | Pa222 (Syn) |
| Ac219 | Pa223 (Syn) |
| Ac220 | Pa224 (Syn) Th220 (Syn) |
| Ac221 | Pa225 (Syn) |
| Ac222 | Ac222m (Syn) Pa226 (Syn) |
| meta state 0.000MeV | None known |
| Ac223 | Pa227 (Syn) |
| Ac224 | Pa228 (Syn) |
| Ac225 | Pa229 (Syn) Ra225 (Syn) Th225 (Syn) |
| Ac226 | Pa230 (Syn) |
| Ac227 | Pa231 (Natural) Ra227 (Syn) |
| Ac228 | Ra228 (Syn) |
| Ac229 | Ra229 (Syn) |
| Ac230 | Ra230 (Syn) |
| Ac231 | Ra231 (Syn) |
| Ac232 | Ra232 (Syn) |
| Ac233 | Ra233 (Syn) |
| Ac234 | Ra234 (Syn) |
| Ac235 | None known |
| Ac236 | None known |
Key:
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Kenneth Barbalace. Periodic Table of Elements - Ac - Actinium. EnvironmentalChemistry.com. 1995 - 2024. Accessed on-line: 12/23/2024
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