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Plutonium-239
Plutonium-239
is an
isotope
of
plutonium
. Plutonium-239 is the primary
fissile
isotope used for the production of
nuclear weapons
, although
uranium-235
has also been used. Plutonium-239 is also one of the three main isotopes demonstrated usable as fuel in thermal spectrum
nuclear reactors
, along with
uranium-235
and
uranium-233
. Plutonium-239 has a
half-life
of 24,110 years.
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