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3 definitions found
From:
DICT.TW English-Chinese Medical Dictionary 英漢醫學字典
alpha particle
名詞
α-粒子
From:
Webster's Revised Unabridged Dictionary (1913)
alpha particle
.
Physics & Chem.
a
particle
emitted
at
high
velocity
from
certain
radioactive
substances
.
It
is
identical
to
the
helium
nucleus
,
consisting
of
two
protons
and
two
neutrons
.
Rays
of
such
particles
are
called
alpha rays
.
◄
►
From:
WordNet (r) 2.0
alpha
particle
n
:
a
positively
charged
particle
that
is
the
nucleus
of
the
helium
atom
;
emitted
from
natural
or
radioactive
isotopes
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