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cobalt-60
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cobalt-60
Wikipedia
Noun
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cobalt
-60
(
uncountable
)
(
physics
)
An
isotope
of cobalt,
60
27
Co, with a
half-life
of 5.2 years; it beta-decays into
nickel
-60 (
60
Ni) and is a potent source of
gamma rays
.