The position sensitivity in a 33 LaBr 3:Ce crystal has been simulated using collimated beams of medium and high energy -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 results indicate that in the 3 3 crystal with darkened surfaces it should be possible to localize the first interaction point of a 662 keV gamma ray within 1 cm, in the case of diffusive surfaces the position sensitivity deteriorates but it is not destroyed. As expected, the position sensitivity improves as the -ray energy increases. The measurements generally confirm the results given by simulations. © 2010 IEEE.

Position sensitivity in 3 × 3 LaBr3:Ce scintillators / F. Birocchi, N. Blasi, F. Camera, F.C.L. Crespi, C. Boiano, S. Brambilla, F. Coniglio, B. Million, S. Riboldi, O. Wieland - In: IEEE Nuclear Science Symposium Conference Record[s.l] : IEEE, 2010. - ISBN 978-1-4244-9105-6. - pp. 198-200 (( convegno 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010 tenutosi a Knoxville, TN, usa nel 2010 [10.1109/NSSMIC.2010.5873746].

Position sensitivity in 3 × 3 LaBr3:Ce scintillators

F. Camera
;
F.C.L. Crespi
;
S. Riboldi
;
2010

Abstract

The position sensitivity in a 33 LaBr 3:Ce crystal has been simulated using collimated beams of medium and high energy -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 results indicate that in the 3 3 crystal with darkened surfaces it should be possible to localize the first interaction point of a 662 keV gamma ray within 1 cm, in the case of diffusive surfaces the position sensitivity deteriorates but it is not destroyed. As expected, the position sensitivity improves as the -ray energy increases. The measurements generally confirm the results given by simulations. © 2010 IEEE.
Radiation; Nuclear and High Energy Physics; Radiology, Nuclear Medicine and Imaging
Settore FIS/04 - Fisica Nucleare e Subnucleare
2010
Nucl. Plasma Sci. Soc. Inst. Electr. Electron. Eng. (NPSS)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/248097
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