Berlin 2018 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 27: Postersession KFM

KFM 27.26: Poster

Donnerstag, 15. März 2018, 15:00–17:00, Poster E

DLTPulseGenerator: A C/C++ Library for the Simulation of Lifetime-Spectra based on Detector-Output Pulses — •Danny Petschke and Torsten Staab — University Würzburg, Dep. of Chemistry, LCTM, Röntgenring 11, D-97070 Würzburg, Germany

The quantitative analysis of lifetime spectra relevant in both life- and material sciences presents one of the ill-posed inverse problems and, hence, leads to most sophisticated requirements on the hardware-specifications and -parameters of the setup as well as on the analysis algorithms. Here we present DLTPulseGenerator, a library written in native C++ 11 which provides a simulation of lifetime spectra according to the measurement setup: i.e. the kind of detectors and the acquisition hardware. The simulation is based on pairs of non-TTL detector-pulses. Those pulses require the Constant-Fraction Principle (CFD) for the determination of the exact timing signal and, thus, the calculation of the time difference i.e. the lifetime. The library provides the simulation of discrete specific lifetimes (e.g. metals, polymers) and the simulation of specific lifetime distributions (Gaussian, Lorentzian and Log-Normal) as can be found in porous materials, i.e. Vycor-glasses and aerogels. To verify our method, simulation results were visually and quantitatively compared to experimentally obtained data using Positron-Annihilation Lifetime Spectroscopy (PALS) on pure Aluminium (4N).