DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2024 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 9: KFM Poster Session

KFM 9.30: Poster

Montag, 18. März 2024, 18:00–20:00, Poster E

Investigation of the feasibility of the re-convolution approach in positron annihilation lifetime spectroscopy using a Geant4 simulation — •Dominik Boras, Danny Petschke, and Torsten Staab — Julius-Maximilians University, Würzburg, Germany

Positron lifetime spectroscopy (PALS) is a powerful technique for studying material properties at the atomic level. The iterative least-squares re-convolution approach determines the best fit of the recorded lifetime spectrum by re-convoluting a sum of N expected exponential decays with the numerical data of the experimentally obtained instrument response function. For a PALS using a sample-source-sandwich, two possible radioactive isotopes 60Co and 207Bi are existing to obtain the instrument resolution function. In this study, we systematically investigated the potential of re-convolution with these isotopes using Geant4, a versatile simulation toolkit for particle interactions. Our research focused on the interaction of the gammas with different energies in the scintillator material and the resulting photomultiplier-pulses. The results shed light on the feasibility and possible benefits of employing re-convolution techniques in enhancing the precision of positron lifetime spectroscopy, offering valuable insights for future advancements in materials characterization and analysis. Here we present a detailed study on the basis of plastic scintillators regarding the spectra decomposability by using the re-convolution technique with simulated spectra by Geant4.

Keywords: Positron Annihilation Lifetime Spectroscopy; Geant4; Re-convolution

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2024 > Berlin