Cm
Curium
Z 96 247.0 g/molActinide Radioactive
| 231Cm | 135 | 231.0507 | 47,270.0 | --- | 20.0 s | (3/2+) | β⁺→231Am α→227Pu | --- |
| 232Cm | 136 | 232.0497 | 46,330.0 | --- | 10.0 s | 0+ | β⁺→232Am α→228Pu | --- |
| 233Cm | 137 | 233.0508 | 47,290.0 | --- | 27.0 s | (3/2+) | β⁺→233Am(80%) α→229Pu(20%) | 2001 |
| 234Cm | 138 | 234.0502 | 46,722.0 | --- | 52.0 s | 0+ | β⁺→234Am(71%) α→230Pu(27%) SF(2%) | 2001 |
| 235Cm | 139 | 235.0515 | 48,010.0 | --- | 7.0 m | (5/2+) | α→231Pu(4%) β⁺→235Am | 1981 |
| 236Cm | 140 | 236.0514 | 47,853.0 | --- | 6.8 m | 0+ | β⁺→236Am(82%) α→232Pu(18%) SF | 2010 |
| 237Cm | 141 | 237.0529 | 49,250.0 | --- | --- | (5/2+) | β⁺→237Am α→233Pu | 2002 |
| 238Cm | 142 | 238.0531 | 49,445.0 | --- | 2.2 h | 0+ | α→234Pu(3.84%) SF(0.048%) EC→238Am | 1994 |
| 239Cm | 143 | 239.0549 | 51,150.0 | --- | 2.5 h | (7/2-) | β⁺→239Am(~100%) α→235Pu(0.006%) | 1952 |
| 240Cm | 144 | 240.0555 | 51,724.2 | --- | 30.4 d | 0+ | α→236Pu(~100%) SF(3.9e-6%) EC→240Am | 1949 |
| 241Cm | 145 | 241.0577 | 53,701.8 | --- | 32.8 d | 1/2+ | EC→241Am(99%) α→237Pu(1%) | 1952 |
| 242Cm | 146 | 242.0588 | 54,803.7 | --- | 162.8 d | 0+ | α→238Pu(~100%) SF(6.2e-6%) CD→208Pb(1.1e-14%) β⁺ | 1949 |
| 242mCm | 146 | 242.0618 | 57,600.0 | --- | 180.0 ns | --- | SF γ→242Cm | 1971 |
| 243Cm | 147 | 243.0614 | 57,181.9 | --- | 29.1 y | 5/2+ | α→239Pu(~100%) EC→243Am(0.29%) SF(5.3e-9%) | 1950 |
| 243mCm | 147 | 243.0615 | 57,269.3 | --- | 1.08 µs | 1/2+ | γ→243Cm(100%) | 1971 |
| 244Cm | 148 | 244.0628 | 58,451.8 | --- | 18.11 y | 0+ | α→240Pu(~100%) SF(1.37e-4%) | 1950 |
| 244mCm | 148 | 244.0639 | 59,492.0 | --- | 34.0 ms | 6+ | γ→244Cm(100%) | 1963 |
| 244nCm | 148 | 244.0639 | 59,550.0 | --- | --- | --- | SF(100%) γ→244Cm | 1969 |
| 245Cm | 149 | 245.0655 | 61,004.5 | --- | 8.25 ky | 7/2+ | α→241Pu(~100%) SF(6.1e-7%) | 1954 |
| 245mCm | 149 | 245.0659 | 61,360.4 | --- | 290.0 ns | 1/2+ | γ→245Cm(100%) | 1975 |
| 246Cm | 150 | 246.0672 | 62,616.9 | --- | 4.71 ky | 0+ | α→242Pu(99.974%) SF(0.026%) | 1954 |
| 246mCm | 150 | 246.0685 | 63,796.6 | --- | 1.12 s | 8- | γ→246Cm(100%) | 2012 |
| 247Cm | 151 | 247.0704 | 65,533.0 | --- | 15.6 My | 9/2- | α→243Pu(100%) | 1954 |
| 247mCm | 151 | 247.0706 | 65,760.0 | --- | 26.3 µs | 5/2+ | γ→247Cm(100%) | 1968 |
| 247nCm | 151 | 247.0708 | 65,938.0 | --- | 100.6 ns | 1/2+ | γ→247Cm(100%) | 2003 |
| 248Cm | 152 | 248.0723 | 67,392.7 | --- | 348.0 ky | 0+ | α→244Pu(91.61%) SF(8.39%) β⁻ | 1956 |
| 248mCm | 152 | 248.0739 | 68,850.8 | --- | 146.0 µs | (8-) | γ→248Cm(100%) | 2012 |
| 249Cm | 153 | 249.076 | 70,750.7 | --- | 1.07 h | 1/2+ | β⁻→249Bk(100%) | 1956 |
| 249mCm | 153 | 249.076 | 70,799.5 | --- | 23.0 µs | 7/2+ | α→245Pu(100%) | 1966 |
| 250Cm | 154 | 250.0784 | 72,990.0 | --- | 8.3 ky | 0+ | SF(74%) α→246Pu β⁻→250Bk | 1966 |
| 251Cm | 155 | 251.0823 | 76,648.0 | --- | 16.8 m | (3/2+) | β⁻→251Bk(100%) | 1978 |
| 252Cm | 156 | 252.0849 | 79,060.0 | --- | 1.0 m | 0+ | β⁻→252Bk α→248Pu | --- |