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Caesium-134 has a half-life of 2.0652 years. It is produced both directly (at a very small yield) as a fission product, but not via beta decay of other fission product nuclides of mass 134, since beta decay stops at stable Xe-134. It is also produced via neutron capture from nonradioactive Cs-133 (neutron capture cross section 29 barns) which is a common fission product.
The combined yield of Cs-133 and Cs-134 is given as 6.7896%. The proportion between the two will change with continued neutron irradiation. Cs-134 also captures neutrons with a cross section of 140 barns, becoming long-lived radioactive Cs-135.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Caesium-134". A list of authors is available in Wikipedia.|