Last Updated
：2025/12/06
delayed neutron
Noun
(nuclear
physics)
A
neutron
produced
as
a
result
of
nuclear
fission
which
is
emitted
upon
the
radioactive
decay
of
a
fission
product
nucleus
seconds
to
minutes
later,
rather
than
at
the
time
of
the
initial
fission
event.
Less
than
2%
of
fission
neutrons
are
delayed
neutrons
(the
exact
proportion
depends
on
the
nuclide
being
fissioned).
Japanese Meaning
核分裂反応によって作られた中性子のうち、初期の核分裂の際には放出されず、核分裂生成物の原子核が放射性崩壊を起こすことによって、数秒から数分後に放出される中性子を指す。 / 全核分裂中性子の中で、約2%未満であり、その割合は反応対象の同位体に依存する。
Sense（1）
(nuclear
physics)
A
neutron
produced
as
a
result
of
nuclear
fission
which
is
emitted
upon
the
radioactive
decay
of
a
fission
product
nucleus
seconds
to
minutes
later,
rather
than
at
the
time
of
the
initial
fission
event.
Less
than
2%
of
fission
neutrons
are
delayed
neutrons
(the
exact
proportion
depends
on
the
nuclide
being
fissioned).
（ plural ）
Quizzes for review
(nuclear physics) A neutron produced as a result of nuclear fission which is emitted upon the radioactive decay of a fission product nucleus seconds to minutes later, rather than at the time of the initial fission event. Less than 2% of fission neutrons are delayed neutrons (the exact proportion depends on the nuclide being fissioned).
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See correct answer
delayed neutron
Operators depend on delayed neutron data to predict the reactor's behavior during transient conditions.
See correct answer
Operators depend on delayed neutron data to predict the reactor's behavior during transient conditions.
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