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Position sensitivity of large volume LaBr3:Ce detectors

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16 Author(s)
F. Birocchi ; Universitá di Milano and INFN sez. di Milano, Via Celoria 16, 20133, Milano, Italy ; N. Blasi ; F. Camera ; F. C. L. Crespi
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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 first interaction with a 1-2 cm resolution. Similar tests have been done in the past using 140 keV ¿-rays and no sensitivity was found. Using GEANT4 simulations we confirmed these results.

Published in:

2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC)

Date of Conference:

Oct. 24 2009-Nov. 1 2009