decay curve

decay curve

[di′kā ‚kərv]
(nuclear physics)
A graph showing how the activity of a radioactive sample varies with time; alternatively, it may show the amount of radioactive material remaining at any time.
References in periodicals archive ?
The energy spectrum decay curve of the LD group herein was generally slightly higher than that of the HD group in the arterial phase.
Through the application of leaf litter decay curve models proposed by Olson (1963), with constant K, and Coelho and Borges (2005), with variable K, the mathematical parameters showed that the second model best described the decomposition process (Table 1), although they showed no significant differences between the groups (p> 0.
Today, he relishes the statistic that, as the it is selling even more than before and defying the decay curve that says designs should peak 18 months after launch.
The naked SPIONs showed faster T2 decay curve compared to PEI-SPIONs and MPEG-PEI-SPIONs.
Depending on the complexity of the decay curve, a single exponential or a sum of two or three exponentials is fitted (MATLAB, The MathWorks, Inc.
The latter, along with measurement of the decay curve, was completed for BNL Emergency Operations to obtain a better understanding of the building dynamics and shelter-in-place requirements.
Because the different polymer materials used in the manufacture of plastics display specific fluorescence lifetimes, the form of the decay curve can be used to identify their chemical nature.
It is also observed that the time constant of the photocurrent decay curve is very small indicating the density of free carriers is larger than the one for trapped carriers; thus the recombination process is dominated by recombination via band to band transitions.
To measure the fluorescence decay curve of the donor in the films, a pulse of light with a wavelength selectively absorbed by the donor dye is used.
Unlike air temperature, soil temperature is subject to a damping effect from deeper soil levels, so although an exponential decay curve may be suitable for air temperature and shallow soil depths, it is possible that sine functions may be more appropriate at deeper levels.
The HCHO concentration decay curve can be plotted and will agree with the predicted curve plotted from [[eta].
There exists a point where the slop of the velocity decay curve takes an abrupt change as explained in Figure 4.