mean life

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Related to Mean lifetime: decay constant

mean life

See half-life.

mean life

[′mēn ′līf]
(physics)
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.
References in periodicals archive ?
0] is the number of positrons created at time zero, and [Tau] is the mean lifetime.
The tables indicate that the apparent mean lifetime decreased by 3.
The study found that mean lifetime number of partners of men in the immediate local community was predictive of risk of HIV acquisition in women, whereas a high prevalence of partnership concurrency in the same local community was not associated with any increase in risk of HIV acquisition.
5 million, or almost 58%--represents mean lifetime lost productivity from deaths caused by infection.