Periodic Table of Elements
Cm - Curium
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Nuclides / Isotopes
| Nuc- lide | Atomic Mass | NN | Abun % | Spin | Half Life | DM | DT | BR % | Decay Energy (MeV) |
|---|---|---|---|---|---|---|---|---|---|
| Cm233 | 233.051 | 137 | Syn | ||||||
| Cm234 | 234.05 | 138 | Syn | 0+ | |||||
| Cm235 | 235.052 | 139 | Syn | ||||||
| Cm236 | 236.051 | 140 | Syn | 0+ |  | Pu232 | 7.100 | ||
 | Am-236 | 1.710 | |||||||
| Cm237 | 237.053 | 141 | Syn | | Cf241 | ||||
| Cm238 | 238.053 | 142 | Syn | 0+ | 2.4h | | Am238 | >=90 | 0.970 |
| 2.4h | | Pu234 | <=10 | 6.620 | |||||
| Cm239 | 239.055 | 143 | Syn | 7/2- | ~2.9h | | Pu235 | <0.1 | 6.460 |
| ~2.9h | | Am-239 | 1.700 | ||||||
| Cm240 | 240.0555 | 144 | Syn | 0+ | 27d | | Pu236 | >99.5 | 6.397 |
| 27d | | Am240 | <0.5 | 0.215 | |||||
| 27d | SF | 3.9E -6 | |||||||
| meta state 2.000MeV | Syn | 10ps | SF | <=100 | 0.000 | ||||
| meta state 3.000MeV | Syn | 55ns | SF | ~100 | |||||
| Cm241 | 241.0577 | 145 | Syn | 1/2+ | 32.8d | | Am241 | 99 | 0.767 |
| 32.8d | | Pu237 | 1 | 6.185 | |||||
| 32.8d | | ||||||||
| Cm242 | 242.0588 | 146 | Syn | 0+ | 162.8d | SF | 6.2E -6 | ||
| 162.8d | | Pu238 | 6.216 | ||||||
| meta state 2.800MeV | Syn | 180ns | IT | Cm242 | 2.800 | ||||
| 180ns | SF | ||||||||
| Cm243 | 243.0614 | 147 | Syn | 5/2+ | 29.1y | | Pu239 | 99.71 | 6.169 |
| 29.1y | | Am243 | 0.29 | 0.009 | |||||
| 29.1y | SF | 5.3E -9 | |||||||
| Cm244 | 244.0627 | 148 | Syn | 0+ | 18.1y | SF | 0.00013 | ||
| 18.1y | | Pu240 | 5.902 | ||||||
| meta state 1.040MeV | Syn | 6+ | 34ms | SF | |||||
| Cm245 | 245.0655 | 149 | Syn | 7/2+ | 8500y | SF | 6.1E -7 | ||
| 8500y | | Pu241 | 5.623 | ||||||
| Cm246 | 246.0672 | 150 | Syn | 0+ | 4730y | | Pu242 | 99.97 | 5.475 |
| 4730y | SF | 0.03 | |||||||
| Cm247 | 247.0704 | 151 | Syn | 9/2- | 1.56E 7y | | Pu243 | 5.353 | |
| Cm248 | 248.0723 | 152 | Syn | 0+ | 3.40E 5y | | Pu244 | 91.74 | 5.162 |
| 3.40E 5y | SF | 8.26 | |||||||
| Cm249 | 249.076 | 153 | Syn | 1/2+ | 64.15m |  - | Bk249 | 0.900 | |
| Cm250 | 250.0784 | 154 | Syn | 0+ | 9000y | SF | ~80 | ||
| 9000y | | Pu246 | ~11 | 5.169 | |||||
| 9000y | - | Bk250 | ~9 | 0.037 | |||||
| Cm251 | 251.0823 | 155 | Syn | 1/2+ | 16.8m | - | Bk251 | 1.420 | |
| Cm252 | 252.085 | 156 | Syn | 0+ | <2d | - | Bk252 | ||
| Nuclide | Potential Parent Nuclides |
|---|---|
| Cm233 | None known |
| Cm234 | None known |
| Cm235 | Cf239 (Syn) |
| Cm236 | Cf240 (Syn) |
| Cm237 | Cf241 (Syn) |
| Cm238 | Bk238 (Syn) Cf242 (Syn) |
| Cm239 | Cf243 (Syn) |
| Cm240 | Bk240 (Syn) Cf244 (Syn) |
| meta state 2.000MeV | None known |
| meta state 3.000MeV | None known |
| Cm241 | Cf245 (Syn) |
| Cm242 | Am242 (Syn) Bk242 (Syn) Cf246 (Syn) Cm242m (Syn) |
| meta state 2.800MeV | None known |
| Cm243 | Bk243 (Syn) Cf247 (Syn) |
| Cm244 | Am244 (Syn) Am244m1 (Syn) Bk244 (Syn) Cf248 (Syn) |
| meta state 1.040MeV | None known |
| Cm245 | Am245 (Syn) Bk245 (Syn) Cf249 (Syn) |
| Cm246 | Am246 (Syn) Am246m (Syn) Bk246 (Syn) Cf250 (Syn) |
| Cm247 | Am247 (Syn) Cf251 (Syn) |
| Cm248 | Am248 (Syn) Bk248m (Syn) Cf252 (Syn) |
| Cm249 | Cf253 (Syn) |
| Cm250 | Cf254 (Syn) |
| Cm251 | None known |
| Cm252 | Cf256 (Syn) |
Key:
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