xenon-135
Xenon-135 (135Xe) is an unstable isotope of xenon with a half-life of 9.14 hours, decaying to long-lived caesium-135.
Key facts
- Isotope.symbol
- Xe
- Isotope.mass_number
- 135
- Isotope.num_neutrons
- 81
- Isotope.num_protons
- 54
- Isotope.abundance
- 0 (synthetic)
- Isotope.image
- Xenon-135.svg
- Isotope.decay_product
- caesium-135
- Isotope.decay_symbol
- Cs
- Isotope.decay_mass
- 135
- Isotope.decay_mode1
- Beta decay
- Isotope.decay_energy1
- 1.165
- Isotope.spin
- 3/2+
via Wikipedia infobox
Article
6 sectionsContents
- <sup>135</sup>Xe effects on reactor restart
- Decay and capture products
- Spatial xenon oscillations
- See also
- References
- Further reading
Xenon-135 (135Xe) is an unstable isotope of xenon with a half-life of 9.14 hours, decaying to long-lived caesium-135.
135Xe is a fission product 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 yield of xenon-135 from fission is about 6.6% (uranium) or 7.4% (plutonium), the great majority from iodine-135. (It is normal for fission products to be formed in such a chain of decays.)