Ce
Cerium
Z 58 140.116 g/molLanthanide
| 140Ce | 82 | 139.9054 | -88,074.2 | 88.449% | Stable | 0+ | --- | 1925 |
| 142Ce | 84 | 141.9093 | -84,532.9 | 11.114% | Stable | 0+ | α→138Ba β⁻ | 1925 |
| 138Ce | 80 | 137.906 | -87,565.9 | 0.251% | Stable | 0+ | β⁺ | 1936 |
| 136Ce | 78 | 135.9071 | -86,508.5 | 0.186% | Stable | 0+ | β⁺ | 1936 |
| 119Ce | 61 | 118.953 | -43,820.0 | --- | 200.0 ms | (5/2+) | β⁺→119La β⁺p→118Ba | --- |
| 120Ce | 62 | 119.9466 | -49,730.0 | --- | 250.0 ms | 0+ | β⁺→120La β⁺p→119Ba | --- |
| 121Ce | 63 | 120.9434 | -52,690.0 | --- | 1.1 s | (5/2+) | β⁺→121La(99%) β⁺p→120Ba(1%) | 1997 |
| 122Ce | 64 | 121.9379 | -57,870.0 | --- | 2.0 s | 0+ | β⁺→122La β⁺p→121Ba | 2005 |
| 123Ce | 65 | 122.9353 | -60,290.0 | --- | 3.8 s | (5/2+) | β⁺→123La(100%) β⁺p→122Ba | 1984 |
| 124Ce | 66 | 123.9303 | -64,920.0 | --- | 9.1 s | 0+ | β⁺→124La(100%) | 1978 |
| 125Ce | 67 | 124.9284 | -66,660.0 | --- | 9.7 s | (7/2-) | β⁺→125La(100%) β⁺p→124Ba | 1978 |
| 125mCe | 67 | 124.9285 | -66,570.0 | --- | 13.0 s | (1/2+) | γ→125Ce(100%) | 2007 |
| 126Ce | 68 | 125.924 | -70,821.0 | --- | 51.0 s | 0+ | β⁺→126La(100%) | 1978 |
| 127Ce | 69 | 126.9227 | -71,979.0 | --- | 34.0 s | (1/2+) | β⁺→127La(100%) | 1978 |
| 127mCe | 69 | 126.9227 | -71,972.0 | --- | 28.6 s | (5/2+) | β⁺→127La(100%) | 1978 |
| 127nCe | 69 | 126.9228 | -71,942.0 | --- | --- | (7/2-) | γ→127Ce(100%) | 1995 |
| 128Ce | 70 | 127.9189 | -75,534.0 | --- | 3.93 m | 0+ | β⁺→128La(100%) | 1968 |
| 129Ce | 71 | 128.9181 | -76,288.0 | --- | 3.5 m | (5/2+) | β⁺→129La(100%) | 1977 |
| 130Ce | 72 | 129.9147 | -79,423.0 | --- | 22.9 m | 0+ | β⁺→130La(100%) | 1965 |
| 130mCe | 72 | 129.9174 | -76,969.0 | --- | 100.0 ns | 7- | γ→130Ce(100%) | 1999 |
| 131Ce | 73 | 130.9144 | -79,710.0 | --- | 10.3 m | 7/2+ | β⁺→131La(100%) | 1966 |
| 131mCe | 73 | 130.9145 | -79,650.0 | --- | 5.4 m | (1/2+) | β⁺→131La(100%) | 1966 |
| 132Ce | 74 | 131.9115 | -82,469.0 | --- | 3.51 h | 0+ | β⁺→132La(100%) | 1960 |
| 132mCe | 74 | 131.914 | -80,128.0 | --- | 9.4 ms | 8- | γ→132Ce(100%) | 1969 |
| 133Ce | 75 | 132.9115 | -82,418.0 | --- | 1.62 h | 1/2+ | β⁺→133La(100%) | 1951 |
| 133mCe | 75 | 132.9116 | -82,381.0 | --- | 5.1 h | 9/2- | β⁺→133La(100%) | 1951 |
| 134Ce | 76 | 133.9089 | -84,833.0 | --- | 3.16 d | 0+ | EC→134La(100%) | 1951 |
| 134mCe | 76 | 133.9124 | -81,624.0 | --- | 308.0 ns | 10+ | γ→134Ce(100%) | 1980 |
| 135Ce | 77 | 134.9092 | -84,616.0 | --- | 17.7 h | 1/2+ | β⁺→135La(100%) | 1948 |
| 135mCe | 77 | 134.9096 | -84,170.0 | --- | 20.0 s | (11/2-) | γ→135Ce(100%) | 1963 |
| 136mCe | 78 | 135.9105 | -83,413.5 | --- | 1.96 µs | 10+ | γ→136Ce(100%) | 1991 |
| 137Ce | 79 | 136.9078 | -85,918.8 | --- | 9.0 h | 3/2+ | β⁺→137La(100%) | 1948 |
| 137mCe | 79 | 136.908 | -85,664.5 | --- | 1.43 d | 11/2- | γ→137Ce(99.21%) β⁺→137La(0.79%) | 1958 |
| 138mCe | 80 | 137.9083 | -85,436.6 | --- | 8.73 ms | 7- | γ→138Ce(100%) | 1960 |
| 139Ce | 81 | 138.9066 | -86,957.7 | --- | 137.64 d | 3/2+ | EC→139La(100%) | 1948 |
| 139mCe | 81 | 138.9075 | -86,203.5 | --- | 57.58 s | 11/2- | γ→139Ce(100%) | 1967 |
| 140mCe | 82 | 139.9077 | -85,966.3 | --- | 7.3 µs | 6+ | γ→140Ce(100%) | 1966 |
| 141Ce | 83 | 140.9083 | -85,431.1 | --- | 32.51 d | 7/2- | β⁻→141Pr(100%) | 1948 |
| 143Ce | 85 | 142.9124 | -81,606.4 | --- | 1.38 d | 3/2- | β⁻→143Pr(100%) | 1948 |
| 144Ce | 86 | 143.9137 | -80,431.9 | --- | 284.89 d | 0+ | β⁻→144Pr(100%) | 1945 |
| 145Ce | 87 | 144.9173 | -77,070.0 | --- | 3.01 m | (5/2-) | β⁻→145Pr(100%) | 1954 |
| 146Ce | 88 | 145.9188 | -75,626.0 | --- | 13.49 m | 0+ | β⁻→146Pr(100%) | 1953 |
| 147Ce | 89 | 146.9227 | -72,014.0 | --- | 56.4 s | (5/2-) | β⁻→147Pr(100%) | 1964 |
| 148Ce | 90 | 147.9244 | -70,398.0 | --- | 56.8 s | 0+ | β⁻→148Pr(100%) | 1964 |
| 149Ce | 91 | 148.9284 | -66,670.0 | --- | 4.94 s | (3/2-) | β⁻→149Pr(100%) | 1974 |
| 150Ce | 92 | 149.9304 | -64,847.0 | --- | 6.05 s | 0+ | β⁻→150Pr(100%) | 1970 |
| 151Ce | 93 | 150.9343 | -61,225.0 | --- | 1.76 s | (3/2-) | β⁻→151Pr(100%) | 1997 |
| 152Ce | 94 | 151.9367 | -58,980.0 | --- | 1.42 s | 0+ | β⁻→152Pr(100%) | 1990 |
| 153Ce | 95 | 152.9411 | -54,910.0 | --- | 865.0 ms | (3/2-) | β⁻→153Pr(100%) β⁻n→152Pr | 1994 |
| 154Ce | 96 | 153.9439 | -52,220.0 | --- | 722.0 ms | 0+ | β⁻→154Pr(100%) β⁻n→153Pr | 1994 |
| 155Ce | 97 | 154.9487 | -47,780.0 | --- | 313.0 ms | (5/2-) | β⁻→155Pr(100%) β⁻n→154Pr | 1994 |
| 156Ce | 98 | 155.9519 | -44,820.0 | --- | 233.0 ms | 0+ | β⁻→156Pr(100%) β⁻n→155Pr | 2017 |
| 157Ce | 99 | 156.9571 | -39,930.0 | --- | 175.0 ms | (7/2+) | β⁻→157Pr(100%) β⁻n→156Pr | 2017 |
| 158Ce | 100 | 157.9608 | -36,540.0 | --- | 99.0 ms | 0+ | β⁻→158Pr(100%) β⁻n→157Pr | 2016 |
| 159Ce | 101 | 158.9664 | -31,340.0 | --- | --- | (1/2-) | β⁻→159Pr β⁻n→158Pr | --- |