鋦的同位素
圖表

| 符號 | Z> 激發能量 | N> 激發能量 | 同位素質量（u） > 激發能量 | 半衰期 | 衰變方式 | 衰變產物 | 原子核 自旋 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 233Cm | 96 | 137 | 233.05077(8) | 1# min | β+ | 233Am | 3/2+# |
| 233Cm | 96 | 137 | 233.05077(8) | 1# min | α | 229Pu | 3/2+# |
| 234Cm | 96 | 138 | 234.05016(2) | 51(12) s | β+ | 234Am | 0+ |
| 234Cm | 96 | 138 | 234.05016(2) | 51(12) s | α | 230Pu | 0+ |
| 235Cm | 96 | 139 | 235.05143(22)# | 5# min | β+ | 235Am | 5/2+# |
| 235Cm | 96 | 139 | 235.05143(22)# | 5# min | α | 231Pu | 5/2+# |
| 236Cm | 96 | 140 | 236.05141(22)# | 10# min | β+ | 236Am | 0+ |
| 236Cm | 96 | 140 | 236.05141(22)# | 10# min | α | 232Pu | 0+ |
| 237Cm | 96 | 141 | 237.05290(22)# | 20# min | β+ | 237Am | 5/2+# |
| 237Cm | 96 | 141 | 237.05290(22)# | 20# min | α | 233Pu | 5/2+# |
| 238Cm | 96 | 142 | 238.05303(4) | 2.4(1) h | ε (90%) | 238Am | 0+ |
| 238Cm | 96 | 142 | 238.05303(4) | 2.4(1) h | α (10%) | 234Pu | 0+ |
| 239Cm | 96 | 143 | 239.05496(11)# | ~2.9 h | β+ (99.9%) | 239Am | (7/2−) |
| 239Cm | 96 | 143 | 239.05496(11)# | ~2.9 h | α (.1%) | 235Pu | (7/2−) |
| 240Cm | 96 | 144 | 240.0555295(25) | 27(1) d | α (99.5%) | 236Pu | 0+ |
| 240Cm | 96 | 144 | 240.0555295(25) | 27(1) d | ε (.5%) | 240Am | 0+ |
| 240Cm | 96 | 144 | 240.0555295(25) | 27(1) d | SF (3.9×10−6%) | (various) | 0+ |
| 241Cm | 96 | 145 | 241.0576530(23) | 32.8(2) d | ε (99%) | 241Am | 1/2+ |
| 241Cm | 96 | 145 | 241.0576530(23) | 32.8(2) d | α (1%) | 237Pu | 1/2+ |
| 242Cm | 96 | 146 | 242.0588358(20) | 162.8(2) d | α | 238Pu | 0+ |
| 242Cm | 96 | 146 | 242.0588358(20) | 162.8(2) d | SF (6.33×10−6%) | (various) | 0+ |
| 242Cm | 96 | 146 | 242.0588358(20) | 162.8(2) d | CD (10−14%) | 208Pb 34Si | 0+ |
| 243Cm | 96 | 147 | 243.0613891(22) | 29.1(1) y | α (99.71%) | 239Pu | 5/2+ |
| 243Cm | 96 | 147 | 243.0613891(22) | 29.1(1) y | ε (.29%) | 243Am | 5/2+ |
| 243Cm | 96 | 147 | 243.0613891(22) | 29.1(1) y | SF (5.3×10−9%) | (various) | 5/2+ |
| 243mCm | 87.4(1) keV | 87.4(1) keV | 87.4(1) keV | 1.08(3) µs |  |  | 1/2+ |
| 244Cm | 96 | 148 | 244.0627526(20) | 18.10(2) y | α | 240Pu | 0+ |
| 244Cm | 96 | 148 | 244.0627526(20) | 18.10(2) y | SF (1.34×10−4%) | (various) | 0+ |
| 244mCm | 1040.188(12) keV | 1040.188(12) keV | 1040.188(12) keV | 34(2) ms | IT | 244Cm | 6+ |
| 245Cm | 96 | 149 | 245.0654912(22) | 8.5(1)×103 y | α | 241Pu | 7/2+ |
| 245Cm | 96 | 149 | 245.0654912(22) | 8.5(1)×103 y | SF (6.1×10−7%) | (various) | 7/2+ |
| 245mCm | 355.90(10) keV | 355.90(10) keV | 355.90(10) keV | 290(20) ns |  |  | 1/2+ |
| 246Cm | 96 | 150 | 246.0672237(22) | 4.76(4)×103 y | α (99.97%) | 242Pu | 0+ |
| 246Cm | 96 | 150 | 246.0672237(22) | 4.76(4)×103 y | SF (.0261%) | (various) | 0+ |
| 246mCm | 1179.66(13) keV | 1179.66(13) keV | 1179.66(13) keV | 1.12(0.24) s | IT | 246Cm | 8- |
| 247Cm | 96 | 151 | 247.070354(5) | 1.56(5)×107 y | α | 243Pu | 9/2− |
| 248Cm | 96 | 152 | 248.072349(5) | 3.48(6)×105 y | α (91.74%) | 244Pu | 0+ |
| 248Cm | 96 | 152 | 248.072349(5) | 3.48(6)×105 y | SF (8.26%) | (various) | 0+ |
| 249Cm | 96 | 153 | 249.075953(5) | 64.15(3) min | β− | 249Bk | 1/2(+) |
| 249mCm | 48.758(17) keV | 48.758(17) keV | 48.758(17) keV | 23 µs |  |  | (7/2+) |
| 250Cm | 96 | 154 | 250.078357(12) | 8,300# y | SF (80%) | (various) | 0+ |
| 250Cm | 96 | 154 | 250.078357(12) | 8,300# y | α (11%) | 246Pu | 0+ |
| 250Cm | 96 | 154 | 250.078357(12) | 8,300# y | β− (9%) | 250Bk | 0+ |
| 251Cm | 96 | 155 | 251.082285(24) | 16.8(2) min | β− | 251Bk | (1/2+) |
1 2 3  畫上#號的數據代表沒有經過實驗的証明，僅為理論推測。
1 2 3  用括號括起來的數據代表不確定性。
↑  穩定的衰變產物以粗體表示。
1 2  Most common isotopes
↑  Heaviest known nuclide to undergo cluster decay
↑  Lightest nuclide to undergo spontaneous fission as the main decay mode
| 0 | 1 | 2 |
| --- | --- | --- |

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