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- W93861605 abstract "The expression ''total activation analysis'' is used as not only short-lived nuclides are activated within a short irradiation of an actual sample but medium-lived and even longer-lived nuclides as well. By means of a specially designed gamma spectrometry system 1 based on a digital preloaded filter, a loss free-counting LFC! system and a software-based multichannel analyzer, up to 120 loss-corrected and 120 noncorrected spectra of 16 000 channels each may be recorded in a true sequence without recording time gaps, which enables optimization of peak-to-background ratios for each half-life of interest by selective summation of sub-spectra. Thus, a peak on a high Compton continuum may have an optimum signal-to-background ratio after a certain decay time, such as the 1642-keV line of 38 Cl on the Compton edge of the 1779-keV line of 28 Al. The multiple spectra method has a further advantage: By drawing the decay curve, it is possible to easily prove whether only one nuclide contributes to the peak area in question or whether dead-time effects disturb the measurement. An example is the 844-keV 27 Mg contribution of the 848-keV peak of 56 Mn, or a weak 27 Mg peak at 1014 keV at a large Compton continuum.more » Even weak peaks may be used for analysis if the optimal range of spectra is selected.« less" @default.
- W93861605 created "2016-06-24" @default.
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- W93861605 date "1999-11-14" @default.
- W93861605 modified "2023-09-27" @default.
- W93861605 title "Total Activation Analysis" @default.
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