Xenon-135

Xenon-135, 135Xe
General
Symbol135Xe
Namesxenon-135, 135Xe, Xe-135
Protons (Z)54
Neutrons (N)81
Nuclide data
Natural abundance0 (synthetic)
Half-life (t1/2)9.14±0.02 h
Spin3/2+
Excess energy−86413±4 keV
Binding energy8398.476±0.028 keV
Decay products135Cs
Decay modes
Decay modeDecay energy (MeV)
Beta decay1.168
Isotopes of xenon
Complete table of nuclides

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;[1] up to 3 million barns[1] under reactor conditions[2]), 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.

  1. ^ a b "Livechart - Table of Nuclides - Nuclear structure and decay data".
  2. ^ ""Xenon Poisoning" or Neutron Absorption in Reactors".