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 ?
The highest mean lifetime costs were among those employed in technicians and related support occupations.
0] denotes the true mean lifetime (in this example, [[Theta].
The positronium formed by these two particles is called ortho-positronium, o-Ps, and has a characteristic lifetime in a vacuum of 142 ns; a lifetime that is considerably longer than the mean lifetime of p-Ps.
0] is the number of positrons created at time zero, and [Tau] is the mean lifetime.
Ninety-eight percent considered themselves heterosexual; the mean lifetime number of sexual partners was 8.
The mean lifetime number of sexual partners was four, and the mean number of partners in the previous six months was one.