| Nuc- lide | Atomic Mass | NN | Abun % | Spin | Half Life | DM | DT | BR % | Decay Energy (MeV) |
|---|---|---|---|---|---|---|---|---|---|
| Pa212 | 121 | Syn | 3+ | 5.1ms | α | ||||
| Pa213 | 122 | Syn | 5.3ms | ||||||
| Pa214 | 123 | Syn | 17ms | ||||||
| Pa215 | 215.019 | 124 | Syn | 14ms | α | Ac211 | 8.170 | ||
| Pa216 | 216.019 | 125 | Syn | 0.20s | α | Ac212 | ~98 | 8.100 | |
| 0.20s | ε | Th216 | ~2 | 7.510 | |||||
| Pa217 | 217.0183 | 126 | Syn | 4.9ms | α | Ac213 | 8.490 | ||
| meta state 1.854MeV | Syn | 1.6ms | α | Ac213 | <=100 | 10.344 | |||
| Pa218 | 218.02 | 127 | Syn | 0.12ms | α | Ac214 | 9.790 | ||
| Pa219 | 219.0199 | 128 | Syn | 9/2- | 53ns | α | Ac215 | 10.080 | |
| Pa220 | 220.0219 | 129 | Syn | 0.78us | ε | Th220 | 3.0E -7 | 5.720 | |
| 0.78us | α | Ac216 | 9.830 | ||||||
| Pa221 | 221.0219 | 130 | Syn | 9/2- | 5.9us | α | Ac217 | 9.250 | |
| Pa222 | 222.0237 | 131 | Syn | 2.9ms | α | Ac218 | 8.850 | ||
| Pa223 | 223.023 | 132 | Syn | 6.5ms | α | Ac219 | 8.340 | ||
| Pa224 | 224.0256 | 133 | Syn | 0.79s | α | Ac220 | 7.694 | ||
| Pa225 | 225.0261 | 134 | Syn | 1.7s | α | Ac221 | 7.390 | ||
| Pa226 | 226.0279 | 135 | Syn | 1.8m | α | Ac222 | 74 | 6.987 | |
| 1.8m | ε | Th226 | 26 | 2.834 | |||||
| Pa227 | 227.0288 | 136 | Syn | 5/2- | 38.3m | α | Ac223 | 85 | 6.580 |
| 38.3m | ε | Th227 | 15 | 1.019 | |||||
| Pa228 | 228.031 | 137 | Syn | 3+ | 22h | ε | Th228 | 98 | 2.148 |
| 22h | α | Ac224 | 2 | 6.265 | |||||
| Pa229 | 229.0321 | 138 | Syn | 5/2+ | 1.50d | ε | Th229 | 99.52 | 0.316 |
| 1.50d | α | Ac225 | 0.48 | 5.841 | |||||
| Pa230 | 230.0345 | 139 | Syn | 2- | 17.4d | ε | Th230 | 91.60 | 1.310 |
| 17.4d | β- | U230 | 8.40 | 0.563 | |||||
| 17.4d | α | Ac226 | 0.0032 | 5.439 | |||||
| Pa231 | 231.0359 | 140 | 100. | 3/2- | 32760y | ε | Th231 | 13E -10 | |
| 32760y | SF | <=3E -10 | |||||||
| 32760y | α | Ac227 | 5.149 | ||||||
| Pa232 | 232.0386 | 141 | Syn | 2- | 1.31d | ε | Th232 | 0.0030 | 0.495 |
| 1.31d | β- | U232 | 1.337 | ||||||
| Pa233 | 233.0402 | 142 | Syn | 3/2- | 26.967d | β- | U233 | 0.571 | |
| Pa234 | 234.0433 | 143 | Syn | 4+ | 6.70h | β- | U234 | 2.197 | |
| meta state 0.074MeV | Syn | 0- | 1.17m | β- | U234 | 99.84 | 2.271 | ||
| 1.17m | IT | 0.16 | 0.074 | ||||||
| Pa235 | 235.0454 | 144 | Syn | 3/2- | 24.5m | β- | U235 | 1.410 | |
| Pa236 | 236.049 | 145 | Syn | 1- | 9.1m | β- | U236 | 2.900 | |
| Pa237 | 237.051 | 146 | Syn | 1/2+ | 8.7m | β- | U237 | 2.250 | |
| Pa238 | 238.0545 | 147 | Syn | 3- | 2.3m | SF | <2.6E -6 | 3.460 | |
| 2.3m | β- | U238 | 3.460 | ||||||
| Pa239 | 239.057 | 148 | Syn | ||||||
| Pa240 | 240.061 | 149 | Syn | ||||||
| Nuclide | Potential Parent Nuclides |
|---|---|
| Pa212 | None known |
| Pa213 | None known |
| Pa214 | None known |
| Pa215 | None known |
| Pa216 | None known |
| Pa217 | None known |
| meta state 1.854MeV | None known |
| Pa218 | None known |
| Pa219 | None known |
| Pa220 | None known |
| Pa221 | None known |
| Pa222 | Np226 (Syn) |
| Pa223 | Np227 (Syn) |
| Pa224 | Np228 (Syn) |
| Pa225 | Np229 (Syn) |
| Pa226 | Np230 (Syn) |
| Pa227 | Np231 (Syn) |
| Pa228 | U228 (Syn) |
| Pa229 | Np233 (Syn) U229 (Syn) |
| Pa230 | None known |
| Pa231 | Np235 (Syn) Th231 (Syn) U231 (Syn) |
| Pa232 | Np236 (Syn) |
| Pa233 | Np237 (Syn) Th233 (Syn) |
| Pa234 | Th234 (Syn) |
| meta state 0.074MeV | None known |
| Pa235 | Th235 (Syn) |
| Pa236 | Th236 (Syn) |
| Pa237 | None known |
| Pa238 | None known |
| Pa239 | None known |
| Pa240 | None known |
Key:
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A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.
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Kenneth Barbalace. Periodic Table of Elements - Pa - Protactinium. EnvironmentalChemistry.com. 1995 - 2024. Accessed on-line: 12/3/2024
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