Xe
Xenon
Z 54 131.293 g/molNoble Gas
| 132Xe | 78 | 131.9042 | -89,278.975 | 26.909% | Stable | 0+ | --- | 1920 |
| 129Xe | 75 | 128.9048 | -88,696.07 | 26.401% | Stable | 1/2+ | --- | 1920 |
| 131Xe | 77 | 130.9051 | -88,413.575 | 21.232% | Stable | 3/2+ | --- | 1920 |
| 134Xe | 80 | 133.9054 | -88,125.834 | 10.436% | Stable | 0+ | β⁻ | 1920 |
| 136Xe | 82 | 135.9072 | -86,429.17 | 8.857% | 2.18 Zy | 0+ | β⁻(100%) | 1920 |
| 130Xe | 76 | 129.9035 | -89,880.474 | 4.071% | Stable | 0+ | --- | 1922 |
| 128Xe | 74 | 127.9035 | -89,860.534 | 1.91% | Stable | 0+ | --- | 1922 |
| 124Xe | 70 | 123.9059 | -87,667.4 | 0.095% | Stable | 0+ | β⁺ | 1922 |
| 126Xe | 72 | 125.9043 | -89,146.387 | 0.089% | Stable | 0+ | β⁺ | 1922 |
| 108Xe | 54 | 107.9542 | -42,630.0 | --- | 72.0 µs | 0+ | α→104Te(100%) | 2018 |
| 109Xe | 55 | 108.9504 | -46,170.0 | --- | 13.0 ms | (7/2+) | α→105Te(100%) β⁺→109I β⁺p→108Te | 2006 |
| 110Xe | 56 | 109.9443 | -51,920.0 | --- | 93.0 ms | 0+ | α→106Te(64%) β⁺→110I(36%) β⁺p→109Te | 1981 |
| 111Xe | 57 | 110.9415 | -54,520.0 | --- | 740.0 ms | (5/2+) | β⁺→111I(89.6%) α→107Te(10.4%) β⁺p→110Te | 1979 |
| 112Xe | 58 | 111.9356 | -60,026.0 | --- | 2.7 s | 0+ | β⁺→112I(98.8%) α→108Te(1.2%) β⁺p→111Te | 1978 |
| 113Xe | 59 | 112.9332 | -62,204.0 | --- | 2.74 s | (5/2+) | β⁺→113I(92.993%) β⁺p→112Te(7%) β⁺α→109Sb(0.007%) α→109Te | 1973 |
| 113mXe | 59 | 112.9337 | -61,800.0 | --- | 6.9 µs | (11/2-) | γ→113Xe(100%) | 2013 |
| 114Xe | 60 | 113.928 | -67,086.0 | --- | 10.0 s | 0+ | β⁺→114I(100%) | 1977 |
| 115Xe | 61 | 114.9263 | -68,657.0 | --- | 18.0 s | (5/2+) | β⁺→115I(99.66%) β⁺p→114Te(0.34%) | 1969 |
| 116Xe | 62 | 115.9216 | -73,047.0 | --- | 59.0 s | 0+ | β⁺→116I(100%) | 1969 |
| 117Xe | 63 | 116.9204 | -74,185.0 | --- | 1.02 m | 5/2+ | β⁺→117I(99.997%) β⁺p→116Te(0.003%) | 1969 |
| 118Xe | 64 | 117.9162 | -78,079.0 | --- | 3.8 m | 0+ | β⁺→118I(100%) | 1965 |
| 119Xe | 65 | 118.9154 | -78,794.0 | --- | 5.8 m | 5/2+ | β⁺→119I(100%) β⁺(79%) EC→119I(21%) | 1965 |
| 120Xe | 66 | 119.9118 | -82,172.0 | --- | 46.0 m | 0+ | β⁺→120I(100%) | 1965 |
| 121Xe | 67 | 120.9115 | -82,481.0 | --- | 40.1 m | 5/2+ | β⁺→121I(100%) | 1952 |
| 122Xe | 68 | 121.9084 | -85,355.0 | --- | 20.1 h | 0+ | EC→122I(100%) | 1952 |
| 123Xe | 69 | 122.9085 | -85,248.0 | --- | 2.08 h | 1/2+ | β⁺→123I(100%) | 1952 |
| 123mXe | 69 | 122.9087 | -85,063.0 | --- | 5.49 µs | 7/2- | γ→123Xe(100%) | 1981 |
| 125Xe | 71 | 124.9064 | -87,199.4 | --- | 16.87 h | 1/2+ | β⁺→125I(100%) | 1950 |
| 125mXe | 71 | 124.9067 | -86,946.8 | --- | 56.9 s | 9/2- | γ→125Xe(100%) | 1954 |
| 125nXe | 71 | 124.9067 | -86,903.5 | --- | 140.0 ns | 7/2+ | γ→125Xe(100%) | 1979 |
| 127Xe | 73 | 126.9052 | -88,321.0 | --- | 36.34 d | 1/2+ | EC→127I(100%) | 1950 |
| 127mXe | 73 | 126.9055 | -88,024.0 | --- | 1.15 m | 9/2- | γ→127Xe(100%) | 1940 |
| 128mXe | 74 | 127.9065 | -87,073.3 | --- | 83.0 ns | 8- | γ→128Xe(100%) | 1981 |
| 129mXe | 75 | 128.905 | -88,459.93 | --- | 8.88 d | 11/2- | γ→129Xe(100%) | 1951 |
| 131mXe | 77 | 130.9053 | -88,249.645 | --- | 11.95 d | 11/2- | γ→131Xe(100%) | 1966 |
| 132mXe | 78 | 131.9071 | -86,526.77 | --- | 8.39 ms | (10+) | γ→132Xe(100%) | 1976 |
| 133Xe | 79 | 132.9059 | -87,643.6 | --- | 5.25 d | 3/2+ | β⁻→133Cs(100%) | 1940 |
| 133mXe | 79 | 132.9062 | -87,410.4 | --- | 2.2 d | 11/2- | γ→133Xe(100%) | 1951 |
| 133nXe | 79 | 132.9082 | -85,497.0 | --- | 8.64 ms | (23/2+) | γ→133Xe(100%) | 2017 |
| 134mXe | 80 | 133.9075 | -86,160.3 | --- | 290.0 ms | 7- | γ→134Xe(100%) | 1968 |
| 134nXe | 80 | 133.9086 | -85,100.6 | --- | 5.0 µs | (10+) | γ→134Xe(100%) | 2001 |
| 135Xe | 81 | 134.9072 | -86,413.0 | --- | 9.14 h | 3/2+ | β⁻→135Cs(100%) | 1940 |
| 135mXe | 81 | 134.9078 | -85,886.0 | --- | 15.29 m | 11/2- | γ→135Xe(~100%) β⁻→135Cs(0.3%) | 1960 |
| 136mXe | 82 | 135.9092 | -84,537.43 | --- | 2.92 µs | 6+ | γ→136Xe(100%) | 1969 |
| 137Xe | 83 | 136.9116 | -82,383.41 | --- | 3.82 m | 7/2- | β⁻→137Cs(100%) | 1943 |
| 138Xe | 84 | 137.9141 | -79,972.2 | --- | 14.14 m | 0+ | β⁻→138Cs(100%) | 1943 |
| 139Xe | 85 | 138.9188 | -75,644.6 | --- | 39.68 s | 3/2- | β⁻→139Cs(100%) | 1951 |
| 140Xe | 86 | 139.9216 | -72,986.5 | --- | 13.6 s | 0+ | β⁻→140Cs(100%) | 1951 |
| 141Xe | 87 | 140.9268 | -68,197.3 | --- | 1.73 s | 5/2- | β⁻→141Cs(99.956%) β⁻n→140Cs(0.044%) | 1951 |
| 142Xe | 88 | 141.93 | -65,229.6 | --- | 1.23 s | 0+ | β⁻→142Cs(99.63%) β⁻n→141Cs(0.37%) | 1960 |
| 143Xe | 89 | 142.9354 | -60,203.0 | --- | 511.0 ms | 5/2- | β⁻→143Cs(99%) β⁻n→142Cs(1%) | 1951 |
| 144Xe | 90 | 143.9389 | -56,872.0 | --- | 388.0 ms | 0+ | β⁻→144Cs(97%) β⁻n→143Cs(3%) | 2003 |
| 145Xe | 91 | 144.9447 | -51,493.0 | --- | 188.0 ms | (3/2-) | β⁻→145Cs(95%) β⁻n→144Cs(5%) β⁻n→143Cs | 2003 |
| 146Xe | 92 | 145.9485 | -47,955.0 | --- | 146.0 ms | 0+ | β⁻→146Cs(93.1%) β⁻n→145Cs(6.9%) | 1989 |
| 147Xe | 93 | 146.9545 | -42,400.0 | --- | 88.0 ms | (3/2-) | β⁻→147Cs(100%) β⁻n→146Cs(<8%) β⁻n→145Cs | 1994 |
| 148Xe | 94 | 147.9585 | -38,650.0 | --- | 85.0 ms | 0+ | β⁻→148Cs(100%) β⁻n→147Cs β⁻n→146Cs | 2010 |
| 149Xe | 95 | 148.9646 | -33,000.0 | --- | 50.0 ms | (3/2-) | β⁻→149Cs β⁻n→148Cs β⁻n→147Cs | 2018 |
| 150Xe | 96 | 149.9689 | -28,990.0 | --- | 40.0 ms | 0+ | β⁻→150Cs β⁻n→149Cs β⁻n→148Cs | 2018 |