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- W2034254834 abstract "Abstract The reliability of a multi-component analysis of positron lifetime spectra is investigated by the evaluation of computer-simulated test spectra. Because of the fact that most evaluation programs use analytical models for the time-resolution function of the spectrometer, a new method is presented to simulate lifetime spectra without any ‘modelling’ of the prompt curve. The basic idea of this new way of simulation is that instead of an analytical function only a set of discrete values of a prompt spectrum (measured or likewise simulated) is used. In this way one gets more realistic test spectra which can be employed as a quality control for any given evaluation program. In this paper, the analysing program POSGAUSS is extensively tested by such lifetime spectra, and the arising systematical and statistical errors are discussed in detail. The main results of this investigation are: (i) already small problems in modelling the resolution function within the analysing program can produce large errors of the fit results, (ii) the standard deviations of the fitted lifetimes and intensities are strongly determined by the total area (and much less by the peak-to-background ratio) of the lifetime spectra, and (iii) an instability of the time-zero point as it can occur even in well temperature-stabilized spectrometers has no important effect on the fit results, as long as this instability is not excessively high." @default.
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- W2034254834 date "1983-02-01" @default.
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- W2034254834 title "Investigations on the reliability of a multi-component analysis of positron lifetime spectra, using a new method of producing computer-simulated test spectra" @default.
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- W2034254834 doi "https://doi.org/10.1016/0167-5087(83)91260-7" @default.
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