Heidelberg 2015 – wissenschaftliches Programm

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

HK: Fachverband Physik der Hadronen und Kerne

HK 60: Instrumentation 18

HK 60.5: Vortrag

Donnerstag, 26. März 2015, 18:30–18:45, M/HS2

Investigation of the Pulse Shape Analysis for the position sensitive γ-ray spectrometer AGATA — •Lars Lewandowski, Benedikt Birkenbach, and Peter Reiter for the AGATA collaboration — Institut für Kernphysik Köln

The next generation of γ-ray spectrometers like AGATA will provide high quality γ-ray spectra by the new Gamma-Ray Tracking technique (GRT) [1]. Position sensitive HPGe detectors will allow for precise Doppler correction and small broadening of lines for spectroscopy at relativistic energies. GRT is based on the interaction position of the γ-rays within the volume of the highly segmented germanium detectors provided by Pulse Shape Analysis (PSA) methods. The proof of principle of GRT was already demonstrated with great success however systematic deviations from expected results occur. The parameterization of the following detector properties and their impact on PSA were thoroughly investigated and optimized: electron and hole mobility, crystal axis orientation, space charge distributions, crystal impurities, response functions of preamplifiers and digitizers, linear and differential crosstalk, time alignment of pulses and the distance metric. Results of an improved PSA performance will be presented.
[1] S. Akkoyun et al., Nucl. Instr. Meth. A668 (2012) 26.