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 fact that the decay in soot concentration is described by a single exponential decay function suggests that the PM content in the cylinder can be described on the following form:
If the energy-dissipative volume expansion is uniformly distributed over the entire specimen, the energy dissipation takes place rather uniformly causing the exponential decay of the transverse wave as observed in Fig.
Based on the exponential decay constants, it was shown that a biowall can improve IAQ three times faster than not having a biowall.
In other words, the response to a "spike," a delta function at t = 0 is an exponential decay with an amplitude [g.
com), we derived the k values from the one-phase exponential decay equation across the maximizer and satisficer groups.
linear-regression technique, even if the intercluster MPCs does not follow exponential decay as is in complicated operation environments, (e.
Successful hatching was observed in all of the temperature treatments, but hatch patterns (time to first hatch, peak hatch, and hatch duration) were negatively related to temperature as indicated in the series of exponential decay, two-parameter models shown in Figure 3 (see Table 1 for model parameter estimates).
It is also noted that natural degradation is high between 0 and 3 years and then slows down in a manner very similar to exponential decay.
In particular, it is already found that the singular values behavior of the operator A is step-like; in fact, the singular values are constant before at a knee after which an exponential decay arises.
The researchers observed an exponential decay in Newtonian viscosity, which was caused by both homogenization pressure and the number of homogenization steps used.
This study attempts to modify Bellalah's ROM as to incorporate factors like exponential decay (9 ) and Poisson event ([xi]) into consideration.
The second curve is the exponential decay curve where Y declines to zero from an initial value and represents the way in which quantities often decay or decline with time.