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IEVref:395-01-13ID:
Language:enStatus: Standard
Term: mean life
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Symbol: τ
Definition: for a radionuclide, time elapsed when the number of atoms or atomic nuclei in the considered state has decreased by a factor 1/e from its initial value

Note 1 to entry: For a radionuclide the radioactive mean life is the reciprocal of the decay constant λ, (τ = 1/ λ).

Note 2 to entry: This entry was numbered 393-14-20 in IEC 60050-393:2003.


Publication date:2014-03
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Internal notes:2015-05-20: Link added to <a href=IEV113-05-21>atomic nuclei</a>. JGO
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