| slovo | definícia |
plutonium
(encz) | plutonium,plutonium [chem.] fikus |
plutonium
(czen) | plutonium,plutonium[chem.] fikus |
plutonium
(wn) | plutonium
n 1: a solid silvery grey radioactive transuranic element whose
atoms can be split when bombarded with neutrons; found in
minute quantities in uranium ores but is usually
synthesized in nuclear reactors; 13 isotopes are known with
the most important being plutonium 239 [syn: plutonium,
Pu, atomic number 94] |
plutonium
(elements) | plutonium
Symbol: Pu
Atomic number: 94
Atomic weight: (242)
Dense silvery radioactive metallic transuranic element, belongs to the
actinoids. Pu-244 is the most stable isotope with a half-life of
7.6*10^7
years. Thirteen isotopes are known. Pu-239 is the most important, it
undergoes nuclear fission with slow neutrons and is hence important to
nuclear weapons and reactors. Plutonium production is monitored down to
the gram to prevent military misuse. First produced by Gleen T. Seaborg,
Edwin M. McMillan, J.W. Kennedy and A.C. Wahl in 1940.
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| | podobné slovo | definícia |
plutonium 239
(encz) | plutonium 239, n: |
plutonium bomb
(encz) | plutonium bomb, n: |
plutonium credit
(encz) | plutonium credit,postavení plutonia [eko.] RNDr. Pavel Piskač |
plutonium pit
(encz) | plutonium pit, n: |
plutonium trigger
(encz) | plutonium trigger, n: |
weapon-grade plutonium
(encz) | weapon-grade plutonium, n: |
weapons plutonium
(encz) | weapons plutonium,zbraňové plutonium n: sheeryjay |
zbraňové plutonium
(czen) | zbraňové plutonium,weapons plutoniumn: sheeryjay |
plutonium 239
(wn) | plutonium 239
n 1: a highly fissionable isotope of plutonium that is used in
atomic weapons and as a reactor fuel; produced by
irradiating uranium 238 with slow electrons |
plutonium bomb
(wn) | plutonium bomb
n 1: a nuclear weapon in which enormous energy is released by
nuclear fission (splitting the nuclei of a heavy element
like uranium 235 or plutonium 239) [syn: atom bomb,
atomic bomb, A-bomb, fission bomb, plutonium bomb] |
plutonium pit
(wn) | plutonium pit
n 1: a steel or beryllium sphere containing plutonium 239 that
triggers nuclear fission when compressed by explosives
[syn: plutonium trigger, plutonium pit] |
plutonium trigger
(wn) | plutonium trigger
n 1: a steel or beryllium sphere containing plutonium 239 that
triggers nuclear fission when compressed by explosives
[syn: plutonium trigger, plutonium pit] |
weapon-grade plutonium
(wn) | weapon-grade plutonium
n 1: plutonium 239 that is recovered when nuclear weapons are
disassembled; it is stored in plutonium pits [syn: {weapons
plutonium}, weapon-grade plutonium] |
weapons plutonium
(wn) | weapons plutonium
n 1: plutonium 239 that is recovered when nuclear weapons are
disassembled; it is stored in plutonium pits [syn: {weapons
plutonium}, weapon-grade plutonium] |
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