Plutonium-239 (239Pu or Pu-239) is an isotope of plutonium. Plutonium-239 is the primary fissile isotope used for the production of nuclear weapons, although...

Thorium–uranium–plutonium was investigated as a nuclear fuel for fast breeder reactors. Trace amounts of plutonium-238, plutonium-239, plutonium-240, and plutonium-244...

8 million years; plutonium-242 with a half-life of 373,300 years; and plutonium-239 with a half-life of 24,110 years; and plutonium-240 with a half-life...

Plutonium-238 (238Pu or Pu-238) is a radioactive isotope of plutonium that has a half-life of 87.7 years. Plutonium-238 is a very powerful alpha emitter;...

uranium-235 and plutonium-239 in the element used must be sufficiently high. Uranium from natural sources is enriched by isotope separation, and plutonium is produced...

Plutonium-240 (240 Pu or Pu-240) is an isotope of plutonium formed when plutonium-239 captures a neutron. The detection of its spontaneous fission led...

fast neutrons and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced...

original working title. Pu-239 is the chemical symbol for plutonium-239 (239Pu), a radioactive isotope of the chemical element plutonium. Timofey Berezin (Paddy...

mid-20th century, plutonium in the environment has been primarily produced by human activity. The first plants to produce plutonium for use in cold war...

isotope 239Pu into a number of other isotopes of plutonium that are less fissile or more radioactive. When 239 Pu absorbs a neutron, it does not always undergo...