U
Uranium
Z 92 238.029 g/molActinide Radioactive
| 238U | 146 | 238.0508 | 47,307.7 | 99.2742% | 4.46 Gy | 0+ | α→234Th(~100%) SF(5.44e-5%) β⁻(2.2e-10%) | 1896 |
| 235U | 143 | 235.0439 | 40,918.8 | 0.7204% | 704.0 My | 7/2- | α→231Th(~100%) SF(7e-9%) CD→215Pb(8e-10%) CD→210Pb(8e-10%) CD→207Hg(8e-10%) | 1935 |
| 234U | 142 | 234.041 | 38,145.0 | 0.0054% | 245.5 ky | 0+ | α→230Th(~100%) SF(1.64e-9%) CD→206Hg(1.4e-11%) CD(9e-12%) | 1912 |
| 215U | 123 | 215.0267 | 24,890.0 | --- | 1.4 ms | (5/2-) | α→211Th β⁺→215Pa | 2015 |
| 216U | 124 | 216.0248 | 23,066.0 | --- | 6.9 ms | 0+ | α→212Th(100%) | 2015 |
| 216mU | 124 | 216.0272 | 25,320.0 | --- | 1.4 ms | (8+) | α→212Th(100%) | 2015 |
| 217U | 125 | 217.0247 | 22,970.0 | --- | 850.0 µs | (1/2-) | α→213Th(100%) β⁻→217Np | 2000 |
| 218U | 126 | 218.0235 | 21,895.0 | --- | 354.0 µs | 0+ | α→214Th(100%) | 1992 |
| 218mU | 126 | 218.0258 | 24,004.0 | --- | 408.0 µs | (8+) | α→214Th(100%) γ→218U | 2005 |
| 219U | 127 | 219.025 | 23,296.0 | --- | 60.0 µs | (9/2+) | α→215Th(100%) β⁺→219Pa | 1993 |
| 220U | 128 | 220.0247 | 23,010.0 | --- | 60.0 ns | 0+ | α→216Th β⁺→220Pa | --- |
| 221U | 129 | 221.0263 | 24,520.0 | --- | 660.0 ns | (9/2+) | α→217Th(100%) β⁺→221Pa | 2015 |
| 222U | 130 | 222.0261 | 24,270.0 | --- | 4.7 µs | 0+ | α→218Th(100%) β⁺→222Pa | 1983 |
| 223U | 131 | 223.028 | 26,050.0 | --- | 65.0 µs | (7/2+) | α→219Th(100%) β⁺→223Pa | 1991 |
| 224U | 132 | 224.0276 | 25,743.0 | --- | 396.0 µs | 0+ | α→220Th(100%) β⁺→224Pa | 1991 |
| 225U | 133 | 225.0294 | 27,372.0 | --- | 62.0 ms | (5/2+) | α→221Th(100%) | 1989 |
| 226U | 134 | 226.0293 | 27,329.0 | --- | 269.0 ms | 0+ | α→222Th(100%) | 1973 |
| 227U | 135 | 227.0312 | 29,045.0 | --- | 1.1 m | (3/2+) | α→223Th(100%) β⁺→227Pa | 1952 |
| 228U | 136 | 228.0314 | 29,220.0 | --- | 9.1 m | 0+ | α→224Th(97.5%) EC→228Pa(2.5%) | 1949 |
| 229U | 137 | 229.0335 | 31,211.0 | --- | 57.8 m | 3/2+ | β⁺→229Pa(80%) α→225Th(20%) | 1949 |
| 230U | 138 | 230.0339 | 31,615.0 | --- | 20.23 d | 0+ | α→226Th(~100%) CD→208Pb(4.8e-12%) SF | 1948 |
| 231U | 139 | 231.0363 | 33,806.0 | --- | 4.2 d | (5/2+) | EC→231Pa(~100%) α→227Th(0.004%) | 1949 |
| 232U | 140 | 232.0372 | 34,609.4 | --- | 68.9 y | 0+ | α→228Th(~100%) CD→208Pb(8.9e-10%) CD→204Hg(<5e-12%) SF(2.7e-12%) | 1949 |
| 233U | 141 | 233.0396 | 36,919.1 | --- | 159.19 ky | 5/2+ | α→229Th(~100%) CD→209Pb(7.2e-11%) SF(<6e-11%) CD→205Hg(<1.3e-13%) | 1947 |
| 234mU | 142 | 234.0425 | 39,566.3 | --- | 33.5 µs | 6- | γ→234U(100%) | 1963 |
| 235mU | 143 | 235.0439 | 40,918.9 | --- | 25.7 m | 1/2+ | γ→235U(100%) | 1966 |
| 235nU | 143 | 235.0466 | 43,420.0 | --- | 3.6 ms | --- | SF(100%) γ→235U | 2007 |
| 236U | 144 | 236.0456 | 42,444.6 | --- | 23.42 My | 0+ | α→232Th(~100%) SF(9.4e-8%) | 1951 |
| 236mU | 144 | 236.0467 | 43,497.1 | --- | 100.0 ns | 4- | γ→236U(100%) | 1973 |
| 236nU | 144 | 236.0485 | 45,195.0 | --- | 120.0 ns | (0+) | γ→236U(87%) SF(13%) α→232Th | 1969 |
| 237U | 145 | 237.0487 | 45,390.1 | --- | 6.75 d | 1/2+ | β⁻→237Np(100%) | 1940 |
| 237mU | 145 | 237.049 | 45,664.1 | --- | 155.0 ns | 7/2- | γ→237U(100%) | 1968 |
| 238mU | 146 | 238.0535 | 49,865.6 | --- | 280.0 ns | 0+ | γ→238U(97.4%) SF(2.6%) | 1979 |
| 239U | 147 | 239.0543 | 50,572.7 | --- | 23.45 m | 5/2+ | β⁻→239Np(100%) | 1937 |
| 239mU | 147 | 239.0544 | 50,706.5 | --- | 780.0 ns | 1/2+ | γ→239U(100%) | 1975 |
| 239nU | 147 | 239.057 | 53,070.0 | --- | --- | --- | SF γ→239U | 1994 |
| 240U | 148 | 240.0566 | 52,715.5 | --- | 14.1 h | 0+ | β⁻→240Np(100%) α→236Th | 1953 |
| 241U | 149 | 241.0603 | 56,200.0 | --- | 4.0 m | (7/2+) | β⁻→241Np | --- |
| 242U | 150 | 242.0629 | 58,620.0 | --- | 16.8 m | 0+ | β⁻→242Np(100%) | 1979 |
| 243U | 151 | 243.0671 | 62,480.0 | --- | 16.0 m | (9/2-) | β⁻→243Np | --- |