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In this work we propose a gamma detector based on Silicon Drift Detectors to readout a 1″×1″ LaBr3:Ce scintillator for gamma-ray spectroscopy and imaging application. Position sensitivity could be useful in nuclear physics research to limit the worsening effect of Doppler broadening in gamma-ray spectroscopy at relativistic velocities. The main difficulty in determining the position of the gamma-ray...
The position sensitivity of a cylindrical continuous 3″ × 3″ (7.62 cm × 7.62 cm) LaBr3:Ce crystal was studied using a collimated beam of 662 keV gamma rays and a spectroscopic shielded PMT (HAMAMATSU R6233-100SEL) with standard passive voltage divider (HAMAMATSU E1198-26). The used crystal is sealed in a capsule and has diffusive/reflective surfaces to optimize the energy resolution. A complete scan...
The position sensitivity in a 3”×3” LaBr3:Ce crystal has been simulated using collimated beams of medium and high energy γ-rays. The simulations have been done using the GEANT4 libraries which allow to follow both the gamma ray interaction in the detector and the scintillation light up to the photocathode. In the simulations the crystal has been coupled to an ideal PSPMT and/or a shielded PMT. The...
The position sensitivity of two large volume (1?? ?? 1?? and 3?? ?? 3??) LaBr3:Ce crystals has been measured using collimated beams of 662 keV ??-rays. The crystals have been coupled to a Position Sensitive Photo Multiplier Tube (PSPMT) and/or shielded phototube. The results indicate that, in the case of 662 keV ?? -rays, both crystals should allow identification of the the position of the ??-ray...
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