Position sensitivity of large volume LaBr3:Ce detectors

Author

Birocchi, F. ; Blasi, N. ; Camera, F. ; Crespi, F.C.L. ; Boiano, C. ; Brambilla, S. ; Coniglio, F. ; Avigo, R. ; Millon, B. ; Riboldi, S. ; Wieland, O. ; Brosamer, J. ; Cinti, M.N. ; Pani, R. ; Fiorini, C. ; Marone, A.

Author_Institution

INFN sez. di Milano, Univ. di Milano, Milan, Italy

fYear

2009

fDate

Oct. 24 2009-Nov. 1 2009

Firstpage

1403

Lastpage

1405

Abstract

The position sensitivity of two large volume (1Â¿ Ã— 1Â¿ and 3Â¿ Ã— 3Â¿) LaBr₃:Ce crystals has been measured using collimated beams of 662 keV Â¿-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 Â¿ -rays, both crystals should allow identification of the the position of the Â¿-ray first interaction with a 1-2 cm resolution. Similar tests have been done in the past using 140 keV Â¿-rays and no sensitivity was found. Using GEANT4 simulations we confirmed these results.

Keywords

Monte Carlo methods; gamma-ray detection; lanthanum compounds; photomultipliers; position sensitive particle detectors; solid scintillation detectors; GEANT4 simulations; LaBr3:Ce crystals; LaBr₃:Ce; PSPMT; collimated gamma-rays; electron volt energy 662 keV; gamma-ray first interaction position; large volume solid scintillator detectors; position sensitive photomultiplier tube; position sensitivity; shielded phototube; size 1 inch; size 3 inch; Collimators; Coordinate measuring machines; Crystals; Energy measurement; Face detection; Gamma ray detection; Gamma ray detectors; Linearity; Medical simulation; Photoelectricity;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

Orlando, FL

ISSN

1095-7863

Print_ISBN

978-1-4244-3961-4

Electronic_ISBN

1095-7863

Type

conf

DOI

10.1109/NSSMIC.2009.5402329

Filename

5402329