Translate:
English
Chinese (S)
Chinese (T)
Croatian
Dutch
French
German
Hebrew
Italian
Japanese
Korean
Portuguese
Russian
Serbian
Spanish
Swedish
Turkish
Additional
uranium-238
English Wikipedia - The Free Encyclopedia
Download this dictionary
Uranium-238
Uranium-238
(
238
U
or
U-238
) is the most common
isotope
of
uranium
found in nature. It is not
fissile
, but is a
fertile material
: it can
capture
a slow
neutron
and after two
beta decays
become fissile
plutonium-239
.
238
U is
fissionable
by
fast neutrons
, but cannot support a
chain reaction
because
inelastic scattering
reduces
neutron energy
below the range where
fast fission
of one or more next-generation nuclei is probable.
Doppler broadening
of U-238's
neutron absorption
resonances
, increasing absorption as fuel temperature increases, is also an essential
negative feedback
mechanism for reactor control.
See more at Wikipedia.org...
© This article uses material from
Wikipedia
®
and is licensed under the
GNU Free Documentation License
and under the
Creative Commons Attribution-ShareAlike License