Eu
Europium
Z 63 151.964 g/molLanthanide
| 153Eu | 90 | 152.9212 | -73,367.5 | 52.19% | Stable | 5/2+ | --- | 1933 |
| 151Eu | 88 | 150.9199 | -74,653.1 | 47.81% | 4.6 Ey | 5/2+ | α→147Pm(100%) | 1933 |
| 130Eu | 67 | 129.964 | -33,510.0 | --- | 1.0 ms | (1+) | p→129Sm(100%) β⁺→130Sm β⁺p→129Pm | 2004 |
| 131Eu | 68 | 130.9576 | -39,460.0 | --- | 17.8 ms | 3/2+ | p→130Sm(89%) β⁺→131Sm β⁺p→130Pm | 1998 |
| 132Eu | 69 | 131.9547 | -42,200.0 | --- | 100.0 ms | (1+) | β⁺→132Sm β⁺p→131Pm | --- |
| 133Eu | 70 | 132.9493 | -47,240.0 | --- | 200.0 ms | (5/2+) | β⁺→133Sm β⁺p→132Pm | --- |
| 134Eu | 71 | 133.9465 | -49,800.0 | --- | 500.0 ms | --- | β⁺→134Sm(100%) β⁺p→133Pm | 1989 |
| 135Eu | 72 | 134.9419 | -54,150.0 | --- | 1.5 s | (5/2+) | β⁺→135Sm(100%) β⁺p→134Pm | 1989 |
| 136Eu | 73 | 135.9396 | -56,240.0 | --- | 3.3 s | (6+) | β⁺→136Sm(99.91%) β⁺p→135Pm(0.09%) | 1987 |
| 136mEu | 73 | 135.9397 | -56,140.0 | --- | 3.8 s | (1+) | β⁺→136Sm(99.91%) β⁺p→135Pm(0.09%) | 1987 |
| 137Eu | 74 | 136.9354 | -60,146.0 | --- | 8.4 s | (5/2+) | β⁺→137Sm(100%) | 1982 |
| 138Eu | 75 | 137.9337 | -61,750.0 | --- | 5.0 s | (2-) | β⁺→138Sm | 1982 |
| 138mEu | 75 | 137.9338 | -61,650.0 | --- | 12.1 s | (7-) | β⁺→138Sm(100%) | 1982 |
| 139Eu | 76 | 138.9298 | -65,398.0 | --- | 17.9 s | (11/2-) | β⁺→139Sm(100%) | 1975 |
| 139mEu | 76 | 138.93 | -65,250.0 | --- | 10.0 µs | (7/2+) | γ→139Eu(100%) | 2011 |
| 140Eu | 77 | 139.9281 | -66,990.0 | --- | 1.51 s | 1+ | β⁺→140Sm(100%) β⁺(95.1%) EC→140Sm(4.9%) | 1982 |
| 140mEu | 77 | 139.9283 | -66,780.0 | --- | 125.0 ms | (5-) | γ→140Eu(100%) β⁺→140Sm(<1%) | 1988 |
| 140nEu | 77 | 139.9288 | -66,320.0 | --- | 299.8 ns | (8+) | γ→140Eu(100%) | 2002 |
| 141Eu | 78 | 140.9249 | -69,926.0 | --- | 40.7 s | 5/2+ | β⁺→141Sm(100%) | 1977 |
| 141mEu | 78 | 140.925 | -69,830.0 | --- | 2.7 s | 11/2- | γ→141Eu(86%) β⁺→141Sm(14%) | 1973 |
| 142Eu | 79 | 141.9234 | -71,310.0 | --- | 2.36 s | 1+ | β⁺→142Sm(100%) β⁺(89.9%) EC→142Sm(10.1%) | 1966 |
| 142mEu | 79 | 141.9239 | -70,856.0 | --- | 1.22 m | 8- | β⁺→142Sm(100%) | 1966 |
| 143Eu | 80 | 142.9203 | -74,241.0 | --- | 2.59 m | 5/2+ | β⁺→143Sm(100%) | 1965 |
| 143mEu | 80 | 142.9207 | -73,851.0 | --- | 50.0 µs | 11/2- | γ→143Eu(100%) | 1978 |
| 144Eu | 81 | 143.9188 | -75,619.0 | --- | 10.2 s | 1+ | β⁺→144Sm(100%) | 1965 |
| 144mEu | 81 | 143.92 | -74,491.0 | --- | 1.0 µs | 8- | γ→144Eu(100%) | 1976 |
| 145Eu | 82 | 144.9163 | -77,992.0 | --- | 5.93 d | 5/2+ | β⁺→145Sm(100%) | 1951 |
| 145mEu | 82 | 144.917 | -77,276.0 | --- | 490.0 ns | 11/2- | γ→145Eu(100%) | 1975 |
| 146Eu | 83 | 145.9172 | -77,118.0 | --- | 4.61 d | 4- | β⁺→146Sm(100%) | 1957 |
| 146mEu | 83 | 145.9179 | -76,452.0 | --- | 235.0 µs | 9+ | γ→146Eu(100%) | 1962 |
| 147Eu | 84 | 146.9168 | -77,544.6 | --- | 24.1 d | 5/2+ | β⁺→147Sm(~100%) α→143Pm(0.002%) | 1951 |
| 147mEu | 84 | 146.9174 | -76,919.3 | --- | 765.0 ns | 11/2- | γ→147Eu(100%) | 1970 |
| 148Eu | 85 | 147.9181 | -76,297.0 | --- | 54.5 d | 5- | β⁺→148Sm(~100%) α→144Pm(9.4e-7%) | 1951 |
| 148mEu | 85 | 147.9189 | -75,577.0 | --- | 162.0 ns | 9+ | γ→148Eu(100%) | 1980 |
| 149Eu | 86 | 148.9179 | -76,441.0 | --- | 93.1 d | 5/2+ | EC→149Sm(100%) | 1959 |
| 149mEu | 86 | 148.9185 | -75,945.0 | --- | 2.45 µs | 11/2- | γ→149Eu(100%) | 1961 |
| 150Eu | 87 | 149.9197 | -74,792.0 | --- | 36.9 y | 5- | β⁺→150Sm(100%) | 1950 |
| 150mEu | 87 | 149.9198 | -74,750.0 | --- | 12.8 h | 0- | β⁻→150Gd(89%) β⁺→150Sm(11%) γ→150Eu | 1953 |
| 151mEu | 88 | 150.9201 | -74,456.9 | --- | 58.9 µs | 11/2- | γ→151Eu(100%) | 1958 |
| 152Eu | 89 | 151.9218 | -72,888.5 | --- | 13.52 y | 3- | β⁺→152Sm(72.08%) β⁻→152Gd(27.92%) | 1938 |
| 152mEu | 89 | 151.9218 | -72,842.9 | --- | 9.31 h | 0- | β⁻→152Gd(73%) β⁺→152Sm(27%) | 1958 |
| 152nEu | 89 | 151.9218 | -72,823.2 | --- | 940.0 ns | 1- | γ→152Eu(100%) | 1978 |
| 153mEu | 90 | 152.9231 | -71,596.5 | --- | 475.0 ns | 19/2- | γ→153Eu(100%) | 2000 |
| 154Eu | 91 | 153.923 | -71,738.4 | --- | 8.59 y | 3- | β⁻→154Gd(99.982%) EC→154Sm(0.018%) | 1947 |
| 154mEu | 91 | 153.9231 | -71,670.2 | --- | 2.2 µs | 2+ | γ→154Eu(100%) | 1964 |
| 154nEu | 91 | 153.9231 | -71,593.1 | --- | 46.3 m | (8-) | γ→154Eu(100%) | 1975 |
| 155Eu | 92 | 154.9229 | -71,818.3 | --- | 4.74 y | 5/2+ | β⁻→155Gd(100%) | 1947 |
| 156Eu | 93 | 155.9248 | -70,083.0 | --- | 15.19 d | 0+ | β⁻→156Gd(100%) | 1947 |
| 157Eu | 94 | 156.9254 | -69,459.0 | --- | 15.18 h | 5/2+ | β⁻→157Gd(100%) | 1951 |
| 158Eu | 95 | 157.9278 | -67,270.5 | --- | 45.9 m | 1- | β⁻→158Gd(100%) | 1951 |
| 159Eu | 96 | 158.9291 | -66,043.0 | --- | 18.1 m | 5/2+ | β⁻→159Gd(100%) | 1961 |
| 160Eu | 97 | 159.9318 | -63,493.4 | --- | 42.6 s | (5-) | β⁻→160Gd(100%) | 1973 |
| 160mEu | 97 | 159.9319 | -63,400.4 | --- | 30.8 s | (1-) | β⁻→160Gd(100%) | 2016 |
| 161Eu | 98 | 160.9337 | -61,792.0 | --- | 26.2 s | (5/2+) | β⁻→161Gd(100%) | 1986 |
| 162Eu | 99 | 161.937 | -58,722.9 | --- | --- | (1+) | β⁻→162Gd(100%) | 1987 |
| 162mEu | 99 | 161.9371 | -58,565.0 | --- | 15.0 s | (6+) | β⁻→162Gd(100%) | 2016 |
| 163Eu | 100 | 162.9393 | -56,573.8 | --- | 7.7 s | (5/2+) | β⁻→163Gd(100%) | 2007 |
| 163mEu | 100 | 162.9403 | -55,609.3 | --- | 911.0 ns | (13/2-) | γ→163Eu(100%) | 2017 |
| 164Eu | 101 | 163.9429 | -53,232.1 | --- | 4.16 s | (3-) | β⁻→164Gd(100%) | 2007 |
| 165Eu | 102 | 164.9455 | -50,729.0 | --- | 2.53 s | (5/2+) | β⁻→165Gd(100%) β⁻n→164Gd | 2007 |
| 166Eu | 103 | 165.9498 | -46,750.0 | --- | 1.24 s | (0-) | β⁻→166Gd(100%) β⁻n→165Gd | 2007 |
| 167Eu | 104 | 166.953 | -43,770.0 | --- | 1.33 s | (5/2+) | β⁻→167Gd(100%) β⁻n→166Gd | 2012 |
| 168Eu | 105 | 167.9579 | -39,250.0 | --- | 200.0 ms | (6-) | β⁻→168Gd(100%) β⁻n→167Gd | 2012 |
| 169Eu | 106 | 168.9617 | -35,660.0 | --- | 420.0 ms | (5/2+) | β⁻→169Gd | 2018 |
| 170Eu | 107 | 169.9669 | -30,860.0 | --- | --- | --- | β⁻→170Gd β⁻n→169Gd | --- |