| Nuc- lide | Atomic Mass | NN | Abun % | Spin | Half Life | DM | DT | BR % | Decay Energy (MeV) |
|---|---|---|---|---|---|---|---|---|---|
| Ra202 | 114 | Syn | 0+ | 0.7ms | α | ||||
| Ra203 | 115 | Syn | 3/2- | 1ms | α | ||||
| Ra204 | 204.006 | 116 | Syn | 0+ | 59ms | α | Rn200 | 7.650 | |
| Ra205 | 205.006 | 117 | Syn | 3/2- | 210ms | α | Rn201 | 7.510 | |
| 210ms | ε | Fr205 | 7.000 | ||||||
| Ra206 | 206.004 | 118 | Syn | 0+ | 0.24s | α | Rn202 | ~100 | 7.416 |
| Ra207 | 207.004 | 119 | Syn | 2-, 3/2- | 1.3s | α | Rn203 | ~90 | 7.270 |
| 1.3s | ε | Fr207 | ~10 | 6.400 | |||||
| meta state 0.470MeV | Syn | 13/2+ | 55ms | IT | Ra207 | 85 | 0.470 | ||
| 55ms | α | Rn203 | 15 | 7.740 | |||||
| 55ms | ε | Fr207 | ~0.35 | 6.870 | |||||
| Ra208 | 208.002 | 120 | Syn | 0+ | 1.3s | α | Rn204 | 95 | 7.273 |
| 1.3s | ε | Fr208 | 5 | 4.330 | |||||
| Ra209 | 209.002 | 121 | Syn | 5/2- | 4.6s | α | Rn205 | ~90 | 7.150 |
| 4.6s | ε | Fr209 | ~10 | 5.610 | |||||
| Ra210 | :210.000 | 122 | Syn | 0+ | 3.7s | α | Rn206 | ~96 | 7.157 |
| 3.7s | ε | Fr210 | ~4 | 3.770 | |||||
| Ra211 | 211.0009 | 123 | Syn | 5/2- | 13s | α | Rn207 | >93 | 7.046 |
| 13s | ε | Fr211 | <7 | 5.000 | |||||
| Ra212 | 211.9998 | 124 | Syn | 0+ | 13s | α | Rn208 | ~90 | 7.032 |
| 13s | ε | Fr212 | ~15 | 3.350 | |||||
| Ra213 | 213.0003 | 125 | Syn | 1/2- | 2.74m | α | Rn209 | 80 | 6.859 |
| 2.74m | ε | Fr213 | 20 | 3.880 | |||||
| meta state 1.770MeV | Syn | 2.1ms | IT | ~99 | 1.770 | ||||
| 2.1ms | α | Rn209 | ~1 | 8.629 | |||||
| Ra214 | 214. | 126 | Syn | 0+ | 2.46s | α | Rn210 | 99.94 | 7.273 |
| 2.46s | ε | Fr214 | 0.06 | 1.059 | |||||
| Ra215 | 215.0027 | 127 | Syn | 9/2+ | 1.59ms | α | Rn211 | 8.864 | |
| Ra216 | 216.0035 | 128 | Syn | 0+ | 182ns | ε | Fr216 | <1.0E -8 | 0.308 |
| 182ns | α | Rn212 | 9.526 | ||||||
| meta state 1.507MeV | Syn | 6+ | <0.2ns | α | Rn212 | 0.58 | 11.034 | ||
| meta state 1.711MeV | Syn | 8+ | 1.42ns | α | Rn212 | 1.86 | 11.237 | ||
| meta state 2.026MeV | Syn | 10+ | 0.6ns | α | Rn212 | 0.12 | 11.552 | ||
| Ra217 | 217.0063 | 129 | Syn | 9/2+ | 1.6us | α | Rn213 | 9.161 | |
| Ra218 | 218.0071 | 130 | Syn | 0+ | 25.6us | α | Rn214 | 8.546 | |
| Ra219 | 219.0101 | 131 | Syn | 7/2+ | 10ms | α | Rn215 | 8.130 | |
| Ra220 | 220.011 | 132 | Syn | 0+ | 18ms | α | Rn216 | 7.595 | |
| Ra221 | 221.0139 | 133 | Syn | 5/2+ | 28s | α | Rn217 | 6.886 | |
| Ra222 | 222.0154 | 134 | Syn | 0+ | 38s | α | Rn218 | 6.681 | |
| Ra223 | 223.0185 | 135 | Syn | 3/2+ | 11.435d | α | Rn219 | 5.979 | |
| Ra224 | 224.0202 | 136 | Syn | 0+ | 3.66d | α | Rn220 | 5.789 | |
| Ra225 | 225.0236 | 137 | Syn | 1/2+ | 14.9d | β- | Ac225 | 0.357 | |
| Ra226 | 226.0254 | 138 | 0+ | 1600y | α | Rn222 | 4.871 | ||
| Ra227 | 227.0292 | 139 | Syn | 3/2+ | 42.2m | β- | Ac227 | 1.325 | |
| Ra228 | 228.0311 | 140 | Syn | 0+ | 5.75y | β- | Ac228 | 0.046 | |
| Ra229 | 229.0348 | 141 | Syn | 5/2+ | 4m | β- | Ac229 | 1.760 | |
| Ra230 | 230.0371 | 142 | Syn | 0+ | 93m | β- | Ac230 | 0.990 | |
| Ra231 | 231.041 | 143 | Syn | 7/2-, 1/2+ | 103s | β- | Ac231 | ||
| Ra232 | 232.044 | 144 | Syn | 0+ | 250s | β- | Ac232 | ||
| Ra233 | 233.048 | 145 | Syn | 30s | β- | Ac233 | |||
| Ra234 | 234.051 | 146 | Syn | 0+ | 30s | β- | Ac234 | ||
| Nuclide | Potential Parent Nuclides |
|---|---|
| Ra202 | None known |
| Ra203 | None known |
| Ra204 | None known |
| Ra205 | None known |
| Ra206 | None known |
| Ra207 | Ra207m (Syn) |
| meta state 0.470MeV | None known |
| Ra208 | Th212 (Syn) |
| Ra209 | Ac209 (Syn) Th213 (Syn) |
| Ra210 | Ac210 (Syn) Th214 (Syn) |
| Ra211 | Th215 (Syn) |
| Ra212 | Ac212 (Syn) Th216 (Syn) Th216m (Syn) |
| Ra213 | Th217 (Syn) |
| meta state 1.770MeV | None known |
| Ra214 | Ac214 (Syn) Th218 (Syn) |
| Ra215 | Ac215 (Syn) Th219 (Syn) |
| Ra216 | Th220 (Syn) |
| meta state 1.507MeV | None known |
| meta state 1.711MeV | None known |
| meta state 2.026MeV | None known |
| Ra217 | Ac217 (Syn) Th221 (Syn) |
| Ra218 | Th222 (Syn) |
| Ra219 | Th223 (Syn) |
| Ra220 | Ac220 (Syn) Fr220 (Syn) Th224 (Syn) |
| Ra221 | Fr221 (Syn) Th225 (Syn) |
| Ra222 | Ac222 (Syn) Ac222m (Syn) Fr222 (Syn) Th226 (Syn) |
| Ra223 | Ac223 (Syn) Fr223 (Natural) Th227 (Syn) |
| Ra224 | Ac224 (Syn) Fr224 (Syn) Th228 (Syn) |
| Ra225 | Fr225 (Syn) Th229 (Syn) |
| Ra226 | Ac226 (Syn) Fr226 (Syn) Th230 (Syn) |
| Ra227 | Fr227 (Syn) Th231 (Syn) |
| Ra228 | Fr228 (Syn) Th232 (Natural) |
| Ra229 | Fr229 (Syn) |
| Ra230 | Fr230 (Syn) |
| Ra231 | Fr231 (Syn) |
| Ra232 | None known |
| Ra233 | None known |
| Ra234 | None known |
Key:
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Kenneth Barbalace. Periodic Table of Elements - Ra - Radium. EnvironmentalChemistry.com. 1995 - 2024. Accessed on-line: 4/26/2024
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