Title :
A High Sensitivity Gamma Ray Imager (HiSGRI) Based on Wavelength-Shifting Fiber Readout of LaBr3 Scintillators
Author :
Budden, Brent ; Cherry, Michael L. ; Case, Gary L. ; Isbert, Joachim ; Stewart, Michael
Author_Institution :
Dept. of Phys. & Astron., Louisiana State Univ., Baton Rouge, LA
fDate :
Oct. 29 2006-Nov. 1 2006
Abstract :
Cerium-doped lanthanum bromide offers increased light yield and peak emission at shorter wavelengths compared to standard inorganic scintillators such as NaI or CsI. As a result, lanthanum bromide scintillators can be used as the basis of large scale hard X-ray/gamma ray imaging systems. By coupling a Ce:LaBr3 scintillator with orthogonal layers of wavelength-shifting fibers viewed by multianode photomultiplier tubes to provide x-y position together with an Anger camera array of large area photomultiplier tubes to measure energy, a detector can be constructed with millimeter-scale position resolution and energy resolution only somewhat less than that obtained with bulk scintillators. We present measurements of the light yields and position resolution achievable with such a system.
Keywords :
gamma-ray detection; lanthanum compounds; photomultipliers; position sensitive particle detectors; solid scintillation detectors; Anger camera array; Ce:LaBr3; cerium-doped lanthanum bromide; energy resolution; gamma ray imaging system; high sensitivity gamma ray imager; inorganic scintillators; large scale hard X-ray imaging; light yield; millimeter-scale position resolution; multianode photomultiplier tube; peak emission; wavelength-shifting fiber readout; Cameras; Energy resolution; Lanthanum; Large-scale systems; Nuclear imaging; Photomultipliers; Position measurement; Sensor arrays; Wavelength measurement; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2006. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-0560-2
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2006.356002
