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.
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I determined the decay constants by obtaining the slopes of least-squares regressions of ln (proportion initial mass remaining) against time.
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They state that C-14 did not have an accelerated decay constant while heavier nuclei did.
0] is the amount of parent isotope in the sample at the time of its formation, t is the age of the sample, and [lambda] is the decay constant of the parent isotope.
Where the Shear Moduli are Gi and the decay constants are Yi.
The different decay constants for the two radioactive systems cause the curved shape.
Initial values and decay constants for terpene emissions for both first-order and double-exponential models were obtained by an iterative nonlinear regression analysis on the experimental data.
All of the proposed models implement various decay constants in the development of their final backward extrapolation model.