Tb
Terbium
Z 65 158.925 g/molLanthanide
| 159Tb | 94 | 158.9254 | -69,532.6 | 100.0% | Stable | 3/2+ | --- | 1933 |
| 135Tb | 70 | 134.9645 | -33,050.0 | --- | 1.01 ms | (7/2-) | p→134Gd(100%) β⁺→135Gd | 2004 |
| 136Tb | 71 | 135.9615 | -35,900.0 | --- | 200.0 ms | (5-) | β⁺→136Gd β⁺p→135Eu | --- |
| 137Tb | 72 | 136.956 | -40,970.0 | --- | 600.0 ms | (3/2+) | p→136Gd β⁺→137Gd | --- |
| 138Tb | 73 | 137.9532 | -43,600.0 | --- | 800.0 ms | (2+) | β⁺→138Gd β⁺p→137Eu | 1993 |
| 139Tb | 74 | 138.9483 | -48,130.0 | --- | 1.6 s | (5/2-) | β⁺→139Gd(100%) β⁺p→138Eu | 1999 |
| 140Tb | 75 | 139.9458 | -50,480.0 | --- | 2.29 s | (7+) | β⁺→140Gd(99.74%) EC→140Gd(<3%) β⁺p→139Eu(0.26%) | 1986 |
| 141Tb | 76 | 140.9414 | -54,540.0 | --- | 3.5 s | (5/2-) | β⁺→141Gd(100%) | 1986 |
| 141mTb | 76 | 140.9414 | -54,540.0 | --- | 7.9 s | (11/2-) | β⁺→141Gd(100%) | 1988 |
| 142Tb | 77 | 141.9393 | -56,560.0 | --- | 597.0 ms | 1+ | β⁺→142Gd(99.998%) β⁺(96.8%) EC→142Gd(3.2%) β⁺p→141Eu(0.002%) | 1991 |
| 142mTb | 77 | 141.9396 | -56,280.0 | --- | 303.0 ms | 5- | γ→142Tb(100%) | 1986 |
| 142nTb | 77 | 141.94 | -55,910.0 | --- | 26.0 µs | 8+ | γ→142Tb(100%) | 1989 |
| 143Tb | 78 | 142.9351 | -60,420.0 | --- | 12.0 s | (11/2-) | β⁺→143Gd(100%) | 1985 |
| 143mTb | 78 | 142.9351 | -60,420.0 | --- | 17.0 s | (5/2+) | β⁺→143Gd | 1986 |
| 144Tb | 79 | 143.933 | -62,368.0 | --- | --- | 1+ | β⁺→144Gd(100%) | 1982 |
| 144mTb | 79 | 143.9335 | -61,971.0 | --- | 4.25 s | 6- | γ→144Tb(66%) β⁺→144Gd(34%) | 1982 |
| 144nTb | 79 | 143.9336 | -61,892.0 | --- | 2.8 µs | (8-) | γ→144Tb(100%) | 1996 |
| 145Tb | 80 | 144.9287 | -66,400.0 | --- | 30.9 s | (11/2-) | β⁺→145Gd(100%) | 1981 |
| 145mTb | 80 | 144.9296 | -65,540.0 | --- | --- | (3/2+) | β⁺→145Gd | 1993 |
| 146Tb | 81 | 145.9273 | -67,760.0 | --- | 8.0 s | 1+ | β⁺→146Gd(100%) | 1974 |
| 146mTb | 81 | 145.9274 | -67,610.0 | --- | 24.1 s | 5- | β⁺→146Gd(100%) | 1974 |
| 146nTb | 81 | 145.9283 | -66,830.0 | --- | 1.18 ms | 10+ | γ→146Tb(100%) | 1989 |
| 147Tb | 82 | 146.9241 | -70,743.0 | --- | 1.64 h | (1/2+) | β⁺→147Gd(100%) | 1969 |
| 147mTb | 82 | 146.9241 | -70,692.0 | --- | 1.87 m | (11/2-) | β⁺→147Gd(100%) | 1987 |
| 148Tb | 83 | 147.9243 | -70,537.0 | --- | 1.0 h | 2- | β⁺→148Gd(100%) | 1960 |
| 148mTb | 83 | 147.9244 | -70,447.0 | --- | 2.2 m | (9+) | β⁺→148Gd(100%) | 1973 |
| 148nTb | 83 | 147.9335 | -61,918.0 | --- | 1.31 µs | (27+) | γ→148Tb(100%) | 1980 |
| 149Tb | 84 | 148.9233 | -71,489.0 | --- | 4.12 h | 1/2+ | β⁺→149Gd(83.3%) α→145Eu(16.7%) | 1950 |
| 149mTb | 84 | 148.9233 | -71,453.0 | --- | 4.16 m | 11/2- | β⁺→149Gd(~100%) α→145Eu(0.022%) | 1962 |
| 150Tb | 85 | 149.9237 | -71,106.0 | --- | 3.48 h | (2-) | β⁺→150Gd(100%) α→146Eu | 1959 |
| 150mTb | 85 | 149.9242 | -70,645.0 | --- | 5.8 m | 9+ | β⁺→150Gd(100%) γ→150Tb | 1993 |
| 151Tb | 86 | 150.9231 | -71,624.0 | --- | 17.61 h | 1/2+ | β⁺→151Gd(99.991%) α→147Eu(0.01%) | 1953 |
| 151mTb | 86 | 150.9232 | -71,524.0 | --- | 25.0 s | 11/2- | γ→151Tb(93.4%) β⁺→151Gd(6.6%) | 1978 |
| 152Tb | 87 | 151.9241 | -70,720.0 | --- | 17.5 h | 2- | β⁺→152Gd(100%) α→148Eu | 1959 |
| 152mTb | 87 | 151.9244 | -70,380.0 | --- | 960.0 ns | 5- | γ→152Tb(100%) | 1972 |
| 152nTb | 87 | 151.9246 | -70,220.0 | --- | 4.2 m | 8+ | γ→152Tb(78.9%) β⁺→152Gd(21.1%) | 1971 |
| 153Tb | 88 | 152.9234 | -71,314.0 | --- | 2.34 d | 5/2+ | β⁺→153Gd(100%) | 1957 |
| 153mTb | 88 | 152.9236 | -71,151.0 | --- | 186.0 µs | 11/2- | γ→153Tb(100%) | 1965 |
| 154Tb | 89 | 153.9247 | -70,160.0 | --- | 9.99 h | 3- | β⁺→154Gd(100%) β⁻→154Dy | 1972 |
| 154mTb | 89 | 153.9248 | -70,030.0 | --- | 21.5 h | 0- | β⁺→154Gd(100%) γ→154Tb β⁻→154Dy | 1950 |
| 154nTb | 89 | 153.9249 | -69,960.0 | --- | 22.7 h | 7- | β⁺→154Gd(100%) γ→154Tb | 1972 |
| 155Tb | 90 | 154.9235 | -71,250.0 | --- | 5.32 d | 3/2+ | EC→155Gd(100%) | 1957 |
| 156Tb | 91 | 155.9248 | -70,091.0 | --- | 5.35 d | 3- | β⁺→156Gd(100%) β⁻→156Dy | 1950 |
| 156mTb | 91 | 155.9248 | -70,003.0 | --- | 5.3 h | (0+) | γ→156Tb β⁺→156Gd | 1950 |
| 156nTb | 91 | 155.9249 | -69,990.0 | --- | 1.02 d | (7-) | γ→156Tb β⁻→156Dy | 1970 |
| 157Tb | 92 | 156.924 | -70,763.8 | --- | 71.0 y | 3/2+ | EC→157Gd(100%) | 1960 |
| 158Tb | 93 | 157.9254 | -69,470.9 | --- | 180.0 y | 3- | β⁺→158Gd(83.4%) β⁻→158Dy(16.6%) | 1957 |
| 158mTb | 93 | 157.9255 | -69,360.6 | --- | 10.7 s | 0- | γ→158Tb(100%) β⁻→158Dy β⁺→158Gd | 1957 |
| 158nTb | 93 | 157.9258 | -69,082.5 | --- | 400.0 µs | 7- | γ→158Tb(100%) | 1961 |
| 160Tb | 95 | 159.9272 | -67,836.5 | --- | 72.3 d | 3- | β⁻→160Dy(100%) | 1943 |
| 161Tb | 96 | 160.9276 | -67,461.8 | --- | 6.95 d | 3/2+ | β⁻→161Dy(100%) | 1949 |
| 162Tb | 97 | 161.9293 | -65,879.5 | --- | 7.6 m | (1-) | β⁻→162Dy(100%) | 1965 |
| 162mTb | 97 | 161.9296 | -65,594.0 | --- | 10.0 m | (4-) | β⁻→162Dy γ→162Tb | 2020 |
| 163Tb | 98 | 162.9307 | -64,596.0 | --- | 19.5 m | 3/2+ | β⁻→163Dy(100%) | 1966 |
| 164Tb | 99 | 163.9333 | -62,105.0 | --- | 3.0 m | (5+) | β⁻→164Dy(100%) | 1968 |
| 164mTb | 99 | 163.9335 | -61,960.0 | --- | 2.0 m | (2+) | β⁻→164Dy γ→164Tb | 2020 |
| 165Tb | 100 | 164.935 | -60,588.8 | --- | 2.11 m | (3/2+) | β⁻→165Dy(100%) | 1983 |
| 165mTb | 100 | 164.9352 | -60,382.0 | --- | 810.0 ns | (7/2-) | γ→165Tb(100%) | 2017 |
| 166Tb | 101 | 165.9379 | -57,808.8 | --- | 27.1 s | (1-) | β⁻→166Dy(100%) | 1996 |
| 166mTb | 101 | 165.9381 | -57,649.8 | --- | 3.5 µs | (4-) | γ→166Tb(100%) | 2017 |
| 167Tb | 102 | 166.94 | -55,883.1 | --- | 18.9 s | (3/2+) | β⁻→167Dy(100%) | 1999 |
| 167mTb | 102 | 166.9402 | -55,683.0 | --- | 1.2 µs | (7/2-) | γ→167Tb(100%) | 2017 |
| 168Tb | 103 | 167.9433 | -52,781.0 | --- | 9.4 s | (4-) | β⁻→168Dy(100%) | 1999 |
| 168mTb | 103 | 167.9436 | -52,570.0 | --- | 710.0 ns | (6+) | γ→168Tb(100%) | 2017 |
| 169Tb | 104 | 168.9458 | -50,480.0 | --- | 5.13 s | (3/2+) | β⁻→169Dy(100%) β⁻n→168Dy | 2012 |
| 170Tb | 105 | 169.9499 | -46,710.0 | --- | 960.0 ms | (2-) | β⁻→170Dy(100%) β⁻n→169Dy | 2012 |
| 171Tb | 106 | 170.953 | -43,770.0 | --- | 1.23 s | (3/2+) | β⁻→171Dy(100%) β⁻n→170Dy | 2012 |
| 172Tb | 107 | 171.9574 | -39,690.0 | --- | 760.0 ms | (6+) | β⁻→172Dy(100%) β⁻n→171Dy | 2012 |
| 173Tb | 108 | 172.9608 | -36,510.0 | --- | 400.0 ms | (3/2+) | β⁻→173Dy β⁻n→172Dy | 2018 |
| 174Tb | 109 | 173.9657 | -31,970.0 | --- | 240.0 ms | (2-) | β⁻→174Dy β⁻n→173Dy | 2018 |