| Nuc- lide | Atomic Mass | NN | Abun % | Spin | Half Life | DM | DT | BR % | Decay Energy (MeV) |
|---|---|---|---|---|---|---|---|---|---|
| Sm130 | 129.949 | 68 | Syn | 0+ | |||||
| Sm131 | 130.946 | 69 | Syn | 1.2s | ε + P | Nd130 | >0 | ||
| 1.2s | ε | Pm131 | |||||||
| Sm132 | 131.941 | 70 | Syn | 0+ | 4s | ε | Pm132 | ||
| 4s | ε + P | Nd131 | |||||||
| Sm133 | 132.939 | 71 | Syn | 5/2+ | 3.7s | ε | Pm133 | ||
| 3.7s | ε + P | Nd132 | |||||||
| Sm134 | 133.934 | 72 | Syn | 0+ | 10s | ε | Pm134 | 5.400 | |
| Sm135 | 134.932 | 73 | Syn | 7/2+ | 10.3s | ε + P | Nd134 | 0.02 | 5.500 |
| 10.3s | ε | Pm135 | 7.200 | ||||||
| Sm136 | 135.928 | 74 | Syn | 0+ | 47s | ε | Pm136 | 4.500 | |
| Sm137 | 136.927 | 75 | Syn | 9/2- | 45s | ε | Pm137 | 6.100 | |
| Sm138 | 137.924 | 76 | Syn | 0+ | 3.1m | ε | Pm138 | 3.900 | |
| Sm139 | 138.9223 | 77 | Syn | 1/2+ | 2.57m | ε | Pm139 | 5.460 | |
| Sm140 | 139.919 | 78 | Syn | 0+ | 14.82m | ε | Pm140 | 3.020 | |
| Sm141 | 140.9185 | 79 | Syn | 1/2+ | 10.2m | ε | Pm141 | 4.543 | |
| meta state 0.176MeV | Syn | 11/2- | 22.6m | ε | Pm141 | 99.69 | 4.719 | ||
| 22.6m | IT | 0.31 | 0.176 | ||||||
| Sm142 | 141.9152 | 80 | Syn | 0+ | 72.49m | ε | Pm142 | 2.090 | |
| Sm143 | 142.9146 | 81 | Syn | 3/2+ | 8.83m | ε | Pm143 | 3.443 | |
| meta state 0.754MeV | Syn | 11/2- | 66s | IT | 99.76 | 0.754 | |||
| 66s | ε | Pm143 | 0.24 | 4.197 | |||||
| meta state 2.795MeV | Syn | 23/2- | 30ms | IT | 2.795 | ||||
| Sm144 | 143.912 | 82 | 3.1 | 0+ | Stable | ||||
| Sm145 | 144.9134 | 83 | Syn | 7/2- | 340d | ε | Pm145 | 0.617 | |
| Sm146 | 145.913 | 84 | Syn | 0+ | 1.03E 8y | α | Nd142 | 2.529 | |
| Sm147 | 146.9149 | 85 | 15. | 7/2- | 1.06E 11y | α | Nd143 | 2.310 | |
| Sm148 | 147.9148 | 86 | 11.3 | 0+ | 7E 15y | α | Nd144 | 1.986 | |
| Sm149 | 148.9172 | 87 | 13.8 | 7/2- | >2E 15y | α | Nd145 | ||
| Sm150 | 149.9173 | 88 | 7.4 | 0+ | Stable | ||||
| Sm151 | 150.9199 | 89 | Syn | 5/2- | 90y | β- | Eu151 | 0.077 | |
| Sm152 | 151.9197 | 90 | 26.7 | 0+ | Stable | ||||
| Sm153 | 152.9221 | 91 | Syn | 3/2+ | 46.284h | β- | Eu153 | 0.808 | |
| Sm154 | 153.9222 | 92 | 22.7 | 0+ | Stable | ||||
| Sm155 | 154.9246 | 93 | Syn | 3/2- | 22.3m | β- | Eu155 | 1.627 | |
| Sm156 | 155.9255 | 94 | Syn | 0+ | 9.4h | β- | Eu156 | 0.722 | |
| Sm157 | 156.9284 | 95 | Syn | 3/2- | 482s | β- | Eu157 | 2.730 | |
| Sm158 | 157.93 | 96 | Syn | 0+ | 5.3m | β- | Eu158 | 1.999 | |
| Sm159 | 158.933 | 97 | Syn | 5/2- | 11.37s | β- | Eu159 | 3.800 | |
| Sm160 | 159.935 | 98 | Syn | 0+ | 9.6s | β- | Eu160 | 3.000 | |
| Sm161 | 160.939 | 99 | Syn | ||||||
| Sm162 | 161.941 | 100 | Syn | 0+ | |||||
| Sm163 | 162.945 | 101 | Syn | ||||||
| Sm164 | 163.948 | 102 | Syn | 0+ | |||||
| Sm165 | 164.953 | 103 | Syn | ||||||
| Nuclide | Potential Parent Nuclides |
|---|---|
| Sm130 | None known |
| Sm131 | None known |
| Sm132 | None known |
| Sm133 | None known |
| Sm134 | Eu134 (Syn) |
| Sm135 | Eu135 (Syn) |
| Sm136 | Eu136 (Syn) Eu136m (Syn) |
| Sm137 | Eu137 (Syn) |
| Sm138 | Eu138 (Syn) Gd139 (Syn) |
| Sm139 | Eu139 (Syn) |
| Sm140 | Eu140 (Syn) Eu140m (Syn) Gd141 (Syn) |
| Sm141 | Eu141 (Syn) Eu141m (Syn) |
| meta state 0.176MeV | None known |
| Sm142 | Eu142 (Syn) Eu142m (Syn) |
| Sm143 | Eu143 (Syn) |
| meta state 0.754MeV | None known |
| meta state 2.795MeV | None known |
| Sm144 | Eu144 (Syn) Gd148 (Syn) |
| Sm145 | Eu145 (Syn) Gd149 (Syn) |
| Sm146 | Eu146 (Syn) Gd150 (Syn) Pm146 (Syn) |
| Sm147 | Eu147 (Syn) Gd151 (Syn) Pm147 (Syn) |
| Sm148 | Eu148 (Syn) Gd152 (Natural) Pm148 (Syn) Pm148m (Syn) |
| Sm149 | Eu149 (Syn) Pm149 (Syn) |
| Sm150 | Eu150 (Syn) Eu150m (Syn) Nd150 (Natural) Pm150 (Syn) |
| Sm151 | Pm151 (Syn) |
| Sm152 | Eu152 (Syn) Eu152m (Syn) Pm152 (Syn) Pm152m (Syn) |
| Sm153 | Pm153 (Syn) |
| Sm154 | Eu154 (Syn) Pm154 (Syn) Pm154m (Syn) |
| Sm155 | Pm155 (Syn) |
| Sm156 | Pm156 (Syn) |
| Sm157 | Pm157 (Syn) |
| Sm158 | Pm158 (Syn) |
| Sm159 | None known |
| Sm160 | None known |
| Sm161 | None known |
| Sm162 | None known |
| Sm163 | None known |
| Sm164 | None known |
| Sm165 | None known |
Key:
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Kenneth Barbalace. Periodic Table of Elements - Sm - Samarium. EnvironmentalChemistry.com. 1995 - 2024. Accessed on-line: 4/20/2024
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