mean life(redirected from Mean lifetime)
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Related to Mean lifetime: decay constant
mean lifeSee half-life.
mean life[′mēn ′līf]
The average time during which a system, such as an atom, nucleus, or elementary particle, exists in a specified form; for a radionuclide or an excited state of an atom or nucleus, it is the reciprocal of the decay constant. Also known as average life; lifetime.