PT Journal
AU AGATA Collaboration
   Doncel, M
   Recchia, F
   Quintana, B
   Gadea, A
   Farnea, E
TI Experimental test of the background rejection, through imaging capability, of a highly segmented AGATA germanium detector
SO Nuclear Instruments & Methods in Physics Research A
JI Nucl. Instrum. Methods Phys. Res. A
PY 2010
BP 614
EP 618
VL 622
IS 3
DI 10.1016/j.nima.2010.07.069
LA English
DE Gamma spectroscopy; Gamma tracking; Imaging; Position-sensitive germanium detectors
AB The development of highly segmented germanium detectors as well as the algorithms to identify the position of the interaction within the crystal opens the possibility to locate the gamma-ray source using Compton imaging algorithms. While the Compton-suppression shield, coupled to the germanium detector in conventional arrays, works also as an active filter against the gamma rays originated outside the target, the new generation of position sensitive gamma-ray detector arrays has to fully rely on tracking capabilities for this purpose. In specific experimental conditions, as the ones foreseen at radioactive beam facilities, the ability to discriminate background radiation improves the sensitivity of the gamma spectrometer. In this work we present the results of a measurement performed at the Laboratori Nazionali di Legnaro (LNL) aiming the evaluation of the AGATA detector capabilities to discriminate the origin of the gamma rays on an event-by-event basis. It will be shown that, exploiting the Compton scattering formula, it is possible to track back gamma rays coming from different positions, assigning them to specific emitting locations. These imaging capabilities are quantified for a single crystal AGATA detector.
ER