Xenon-135
Xenon-135 (135Xe) is an unstable isotope of xenon with a half-life of about 9.2 hours. 135Xe is a fission product of uranium and it is the most powerful known neutron-absorbing nuclear poison (2 million barns; up to 3 million barns under reactor conditions), with a significant effect on nuclear reactor operation. The ultimate yield of xenon-135 from fission is 6.3%, though most of this is from fission-produced tellurium-135 and iodine-135.
| General | |
|---|---|
| Symbol | 135Xe |
| Names | xenon-135, 135Xe, Xe-135 |
| Protons (Z) | 54 |
| Neutrons (N) | 81 |
| Nuclide data | |
| Natural abundance | syn |
| Half-life (t1/2) | 9.14±0.02 h |
| Spin | 3/2+ |
| Excess energy | −86413±4 keV |
| Binding energy | 8398.476±0.028 keV |
| Decay products | 135Cs |
| Decay modes | |
| Decay mode | Decay energy (MeV) |
| Beta decay | 1.168 |
| Isotopes of xenon Complete table of nuclides | |
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