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Pulse-Shape Analysis and position resolution in highly segmented HPGe AGATA detectors

  • L. Lewandowski
  • P. ReiterEmail author
  • B. Birkenbach
  • B. Bruyneel
  • E. Clement
  • J. Eberth
  • H. Hess
  • C. Michelagnoli
  • H. Li
  • R. M. Perez-Vidal
  • M. Zielinska
Regular Article - Experimental Physics

Abstract.

The performance of the Pulse-Shape Analysis (PSA) in AGATA HPGe detectors was investigated and improved employing a \(\gamma\)-ray source measurement based on \( e^{+}e^{-}\) annihilation radiation after decays of 22Na by \( \beta^{+}\) decay. The first interaction positions of the two 511keV \(\gamma\) 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.

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Copyright information

© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • L. Lewandowski
    • 1
  • P. Reiter
    • 1
    Email author
  • B. Birkenbach
    • 1
  • B. Bruyneel
    • 1
  • E. Clement
    • 2
  • J. Eberth
    • 1
  • H. Hess
    • 1
  • C. Michelagnoli
    • 2
  • H. Li
    • 2
  • R. M. Perez-Vidal
    • 3
  • M. Zielinska
    • 4
  1. 1.University of Cologne, Institut für KernphysikKölnGermany
  2. 2.Grand Accélérateur National d’Ions LourdsCaenFrance
  3. 3.Instituto de Fisica CorpuscularCSIC-Universitat de ValenciaValenciaSpain
  4. 4.CEA Saclay, Service de Physique NucleaireGif-sur-YvetteFrance

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