https://doi.org/10.1140/epja/i2019-12752-0
Regular Article - Experimental Physics
Pulse-Shape Analysis and position resolution in highly segmented HPGe AGATA detectors
1
University of Cologne, Institut für Kernphysik, Zülpicher Strasse 77, 50937, Köln, Germany
2
Grand Accélérateur National d’Ions Lourds, Boulevard Henri Becquerel, 14000, Caen, France
3
Instituto de Fisica Corpuscular, CSIC-Universitat de Valencia, E-46920, Valencia, Spain
4
CEA Saclay, Service de Physique Nucleaire, 91191, Gif-sur-Yvette, France
* e-mail: preiter@ikp.uni-koeln.de
Received:
14
January
2019
Accepted:
9
April
2019
Published online:
27
May
2019
The performance of the Pulse-Shape Analysis (PSA) in AGATA HPGe detectors was investigated and improved employing a 
-ray source measurement based on 
annihilation radiation after decays of 22Na by 
decay. The first interaction positions of the two 511keV rays were determined and the connecting line of these two positions was compared to the known source position as a measure for the PSA performance. The position resolution and its dependence on the PSA parameters were investigated by varying most relevant input quantities: the charge carrier mobility of the holes, the response of the employed measuring electronics especially the preamplifier rise time. The relative statistical weight of charge signals and transient signals was scrutinized. The optimal distance metric of the grid-search algorithm and its impact on the position resolution were determined.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019
