mean life
noun
,
Physics.
1.
the average time that an unstable particle or nucleus survives before it decays.
2.
decay time
.
Also called
average life,
lifetime
.
British Dictionary definitions for
mean life
mean life
noun
1.
(
physics
) the average time of existence of an unstable or reactive entity, such as a nucleus, elementary particle, charge carrier, etc; lifetime. It is equal to the half-life divided by 0.693 15
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