IEVref:395-01-11ID:
Language:enStatus: Obsolete
Term: decay constant
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Symbol: λ
Definition: disintegrations per unit time dN/dt for an atomic nucleus divided by the number of nuclei N existing at the same time t

Note 1 to entry: The decay constant is expressed in reciprocal seconds (s−1).

Note 2 to entry: The decay constant may be considered the total probability of radioactive decay (disintegration and/or nuclear transition).

Note 3 to entry: This entry was numbered 393-14-18 in IEC 60050-393:2003.


Publication date:2014-03
SourceISO 921:1997, definition 282, modified
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Internal notes:2015-05-20: Link added to <a href=IEV113-05-21>atomic nucleus</a>. JGO
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