Performance of the AGATA Gamma-ray Spectrometer in the PreSPEC Set-up at GSI

Natasa Lalovic, C. Louchart, C. Michelagnoli, R.M. Perez-Vidal, D. Ralet, J. Gerl, Dirk Rudolph, T. Arici, D. Bazzacco, E. Clement, A. Gadea, I. Kojouharov, A. Korichi, M. Labiche, J. Ljungvall, A. Lopez-Martens, J. Nyberg, N. Pietralla, S. Pietri, O. Stezowskithe AGATA Collaboration, the PreSPEC Collaboration

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Abstract

In contemporary nuclear physics, the European Advanced GAmma Tracking Array (AGATA) represents a crucial detection system for cutting-edge nuclear structure studies. AGATA consists of highly segmented high-purity germanium crystals and uses the pulse-shape analysis technique to determine both the position and the energy of the γ-ray interaction points in the crystals. It is the tracking algorithms that deploy this information and enable insight into the sequence of interactions, providing information on the full or partial absorption of the γ ray. A series of dedicated performance measurements for an AGATA set-up comprising 21 crystals is described. This set-up was used within the recent PreSPEC–AGATA experimental campaign at the GSI Helmholtzzentrum für Schwerionenforschung. Using the radioactive sources 56Co, 60Co and 152Eu, absolute and normalized efficiencies and the peak-to-total of the array were measured. These quantities are discussed using different data analysis procedures. The quality of the pulse-shape analysis and the tracking algorithm are evaluated. The agreement between the experimental data and the Geant4 simulations is also investigated
Original languageEnglish
Pages (from-to)258-266
Number of pages9
JournalNuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Volume806
DOIs
Publication statusPublished - 2016

Subject classification (UKÄ)

  • Subatomic Physics

Keywords

  • gamma-ray spectroscopy
  • AGATA spectrometer
  • PreSPEC-AGATA

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