Hf
Hafnium
Z 72 178.486 g/molTransition Metal
| 180Hf | 108 | 179.9466 | -49,779.5 | 35.08% | Stable | 0+ | --- | 1934 |
| 178Hf | 106 | 177.9437 | -52,435.4 | 27.28% | Stable | 0+ | --- | 1934 |
| 177Hf | 105 | 176.9432 | -52,880.7 | 18.6% | Stable | 7/2- | --- | 1934 |
| 179Hf | 107 | 178.9458 | -50,463.0 | 13.62% | Stable | 9/2+ | --- | 1934 |
| 176Hf | 104 | 175.9414 | -54,576.4 | 5.26% | Stable | 0+ | --- | 1934 |
| 174Hf | 102 | 173.94 | -55,844.6 | 0.16% | 2.0 Py | 0+ | α→170Yb(100%) β⁺ | 1939 |
| 153Hf | 81 | 152.9707 | -27,300.0 | --- | 400.0 ms | (1/2+) | β⁺→153Lu | 2000 |
| 153mHf | 81 | 152.9715 | -26,550.0 | --- | 500.0 ms | (11/2-) | β⁺→153Lu γ→153Hf | --- |
| 154Hf | 82 | 153.9649 | -32,730.0 | --- | 2.0 s | 0+ | β⁺→154Lu(100%) | 1981 |
| 154mHf | 82 | 153.9678 | -30,010.0 | --- | 9.0 µs | (10+) | γ→154Hf(100%) | 1989 |
| 155Hf | 83 | 154.9632 | -34,310.0 | --- | 843.0 ms | (7/2-) | β⁺→155Lu(100%) α→151Yb | 1981 |
| 156Hf | 84 | 155.9594 | -37,820.0 | --- | 23.0 ms | 0+ | α→152Yb(100%) β⁺→156Lu | 1979 |
| 156mHf | 84 | 155.9615 | -35,860.0 | --- | 480.0 µs | (8+) | α→152Yb(100%) γ→156Hf | 1979 |
| 157Hf | 85 | 156.9583 | -38,860.0 | --- | 115.0 ms | 7/2- | α→153Yb(94%) β⁺→157Lu(14%) | 1965 |
| 158Hf | 86 | 157.9548 | -42,102.0 | --- | 2.85 s | 0+ | β⁺→158Lu(55.7%) α→154Yb(44.3%) | 1965 |
| 159Hf | 87 | 158.954 | -42,853.0 | --- | 5.2 s | 7/2- | β⁺→159Lu(65%) α→155Yb(35%) | 1973 |
| 160Hf | 88 | 159.9507 | -45,939.0 | --- | 13.6 s | 0+ | β⁺→160Lu(99.3%) α→156Yb(0.7%) | 1973 |
| 161Hf | 89 | 160.9503 | -46,316.0 | --- | 18.4 s | (7/2-) | β⁺→161Lu(99.71%) α→157Yb(0.29%) | 1973 |
| 161mHf | 89 | 160.9506 | -45,987.0 | --- | 4.8 µs | (13/2+) | γ→161Hf(100%) | 2014 |
| 162Hf | 90 | 161.9472 | -49,168.0 | --- | 39.4 s | 0+ | β⁺→162Lu(99.992%) α→158Yb(0.008%) | 1982 |
| 163Hf | 91 | 162.9471 | -49,269.0 | --- | 40.0 s | (5/2-) | β⁺→163Lu(100%) α→159Yb | 1982 |
| 164Hf | 92 | 163.9444 | -51,818.0 | --- | 1.85 m | 0+ | β⁺→164Lu(100%) | 1981 |
| 165Hf | 93 | 164.9446 | -51,636.0 | --- | 1.27 m | (5/2-) | β⁺→165Lu(100%) | 1981 |
| 166Hf | 94 | 165.9422 | -53,859.0 | --- | 6.77 m | 0+ | β⁺→166Lu(100%) | 1965 |
| 167Hf | 95 | 166.9426 | -53,468.0 | --- | 2.05 m | (5/2-) | β⁺→167Lu(100%) | 1969 |
| 168Hf | 96 | 167.9406 | -55,361.0 | --- | 25.95 m | 0+ | β⁺→168Lu(100%) EC→168Lu(98%) β⁺(2%) | 1961 |
| 169Hf | 97 | 168.9413 | -54,717.0 | --- | 3.24 m | (5/2-) | β⁺→169Lu(100%) | 1969 |
| 170Hf | 98 | 169.9396 | -56,254.0 | --- | 16.01 h | 0+ | EC→170Lu(100%) | 1961 |
| 171Hf | 99 | 170.9405 | -55,431.0 | --- | 12.1 h | 7/2+ | β⁺→171Lu(100%) | 1951 |
| 171mHf | 99 | 170.9405 | -55,409.0 | --- | 29.5 s | 1/2- | γ→171Hf(100%) β⁺→171Lu | 1997 |
| 172Hf | 100 | 171.9394 | -56,402.0 | --- | 1.87 y | 0+ | EC→172Lu(100%) | 1951 |
| 172mHf | 100 | 171.9416 | -54,396.0 | --- | 163.0 ns | (8-) | γ→172Hf(100%) | 1976 |
| 173Hf | 101 | 172.9405 | -55,412.0 | --- | 23.6 h | 1/2- | β⁺→173Lu(100%) | 1951 |
| 173mHf | 101 | 172.9406 | -55,305.0 | --- | 180.0 ns | 5/2- | γ→173Hf(100%) | 1973 |
| 173nHf | 101 | 172.9407 | -55,215.0 | --- | 160.0 ns | 7/2+ | γ→173Hf(100%) | 1973 |
| 174mHf | 102 | 173.9417 | -54,295.3 | --- | 138.0 ns | 6+ | γ→174Hf(100%) | 1976 |
| 174nHf | 102 | 173.942 | -54,047.0 | --- | 2.39 µs | 8- | γ→174Hf(100%) | 1974 |
| 175Hf | 103 | 174.9415 | -54,481.8 | --- | 70.65 d | 5/2- | EC→175Lu(100%) | 1949 |
| 175mHf | 103 | 174.9416 | -54,355.9 | --- | 53.7 µs | 1/2- | γ→175Hf(100%) | 1964 |
| 175nHf | 103 | 174.9431 | -53,048.4 | --- | 1.1 µs | 19/2+ | γ→175Hf(100%) | 1990 |
| 176mHf | 104 | 175.9428 | -53,243.3 | --- | 9.6 µs | 6+ | γ→176Hf(100%) | 1964 |
| 176nHf | 104 | 175.9431 | -53,017.1 | --- | 9.9 µs | 8- | γ→176Hf(100%) | 1967 |
| 177mHf | 105 | 176.9446 | -51,565.2 | --- | 1.09 s | 23/2+ | γ→177Hf(100%) | 1966 |
| 177nHf | 105 | 176.9447 | -51,538.3 | --- | 55.9 µs | (19/2-) | γ→177Hf(100%) | 1976 |
| 178mHf | 106 | 177.9449 | -51,288.0 | --- | 4.0 s | 8- | γ→178Hf(100%) | 1960 |
| 178nHf | 106 | 177.9463 | -49,989.3 | --- | 31.0 y | 16+ | γ→178Hf(100%) | 1968 |
| 179mHf | 107 | 178.9462 | -50,088.0 | --- | 18.67 s | 1/2- | γ→179Hf(100%) | 1962 |
| 179nHf | 107 | 178.947 | -49,356.6 | --- | 25.0 d | 25/2- | γ→179Hf(100%) | 1970 |
| 180mHf | 108 | 179.9478 | -48,637.9 | --- | 5.53 h | 8- | γ→180Hf(~100%) β⁻→180Ta(0.31%) | 1951 |
| 180nHf | 108 | 179.948 | -48,405.1 | --- | 570.0 µs | 4- | γ→180Hf(100%) | 1990 |
| 181Hf | 109 | 180.9491 | -47,403.0 | --- | 42.39 d | 1/2- | β⁻→181Ta(100%) | 1935 |
| 181mHf | 109 | 180.9497 | -46,807.7 | --- | 80.0 µs | 9/2+ | γ→181Hf(100%) | 2001 |
| 181nHf | 109 | 180.9502 | -46,359.5 | --- | --- | (17/2+) | γ→181Hf(100%) | 2001 |
| 182Hf | 110 | 181.9506 | -46,050.0 | --- | 8.9 My | 0+ | β⁻→182Ta(100%) | 1961 |
| 182mHf | 110 | 181.9518 | -44,877.0 | --- | 1.02 h | 8- | β⁻→182Ta(54%) γ→182Hf(46%) | 1971 |
| 182nHf | 110 | 181.9533 | -43,479.0 | --- | 40.0 µs | (13+) | γ→182Hf(100%) | 1999 |
| 183Hf | 111 | 182.9535 | -43,280.0 | --- | 1.02 h | (3/2-) | β⁻→183Ta(100%) | 1956 |
| 183mHf | 111 | 182.9551 | -41,820.0 | --- | 40.0 s | (27/2-) | γ→183Hf(100%) β⁻→183Ta | 2010 |
| 184Hf | 112 | 183.9554 | -41,500.0 | --- | 4.12 h | 0+ | β⁻→184Ta(100%) | 1973 |
| 184mHf | 112 | 183.9568 | -40,230.0 | --- | 48.0 s | 8- | γ→184Hf(100%) β⁻→184Ta | 1995 |
| 184nHf | 112 | 183.9581 | -39,020.0 | --- | 16.0 m | (15+) | β⁻→184Ta γ→184Hf | 2010 |
| 185Hf | 113 | 184.9589 | -38,320.0 | --- | 3.5 m | (9/2-) | β⁻→185Ta(100%) | 1993 |
| 186Hf | 114 | 185.9609 | -36,420.0 | --- | 2.6 m | 0+ | β⁻→186Ta(100%) | 1998 |
| 186mHf | 114 | 185.9641 | -33,450.0 | --- | --- | (17+) | β⁻→186Ta γ→186Hf | 2010 |
| 187Hf | 115 | 186.9646 | -33,000.0 | --- | 14.0 s | (9/2-) | β⁻→187Ta | 1999 |
| 187mHf | 115 | 186.9651 | -32,500.0 | --- | 270.0 ns | (3/2-) | γ→187Hf(100%) | 2009 |
| 188Hf | 116 | 187.9669 | -30,830.0 | --- | 7.0 s | 0+ | β⁻→188Ta | 1999 |
| 189Hf | 117 | 188.9709 | -27,150.0 | --- | 400.0 ms | (3/2-) | β⁻→189Ta(100%) | 2009 |
| 190Hf | 118 | 189.9734 | -24,800.0 | --- | 600.0 ms | 0+ | β⁻→190Ta | 2012 |