The chemical element with atomic number 92. Its long-lived radioactive isotopes illustrate actinide production by the rapid neutron-capture process.
The orthorhombic low-temperature phase of uranium metal. Its anisotropic thermal and irradiation response makes crystal grain crystallographic texture important for dimensional stability.
uranium with less uranium-235 than natural uranium. Addition to an immobilised plutonium inventory can dilute uranium-235 subsequently formed by plutonium-239 radioactive decay; chemical coexistence is not irreversible protection against deliberate separation.
An unstable uranium isotope produced by neutron capture on uranium-238. Two successive beta-minus decays, through neptunium-239, lead to plutonium-239.
A fertile material whose neutron capture produces uranium-239. It can undergo neutron-induced fission at sufficiently high incident neutron energies, while slow-neutron capture can instead initiate breeding of plutonium-239.
A uranium isotope that is a principal fissile material in thermal-neutron reactors. Capturing a neutron produces excited uranium-236.
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Uranium is a heavy, radioactive metallic element with the chemical symbol U and atomic number 92. It is part of the actinide series in the periodic table and is primarily known for its use as a fuel in nuclear reactors and in the production of nuclear weapons. Uranium is found in various minerals in the Earth's crust, most commonly in uranium oxide minerals such as uraninite.
