decay constant


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de·cay con·stant

the fractional change in the number of atoms of a radionuclide that occurs in unit time; the constant λ in the equation for the fraction (dN/N) of the number of atoms (N) of a radionuclide disintegrating in time dt, dN/N = -λdt.

de·cay con·stant

(dĕ-kā' kon'stănt)
The fractional change in the number of atoms of a radionuclide that occurs in a unit of time; the constant l in the equation for the fraction (DN/N) of the number of atoms (N) of a radionuclide disintegrating in time Dt, DN/N = - lDt.
Synonym(s): radioactive constant.
References in periodicals archive ?
The significance of the estimated difference in the time decay constant over distance from CWD ([c.
Closely related to the decay constant is the half-life ([[tau].
The half-life, therefore, is inversely proportional to the decay constant of a radioactive isotope.
We can measure both the present-day ratios of D/d and N/d in a sample, and we know the value of the decay constant.
All of the proposed models implement various decay constants in the development of their final backward extrapolation model.
6 years, corresponding to the suggested decay constants of 0.