DocumentCode :
1342860
Title :
Performance of 8 
8 Pixel LaBr 
:Ce and Gd  energy resolutions of 4.1 ± 0.1% and 3.0 ± 0.1% at 356 and 662 keV, respectively, measured with a single anode photomultiplier tube (PMT). The crystal had the following volumetric uniformities: light outputs with a difference of 0.5% (standard deviation: SD) and energy resolutions with that of 2% (SD) at 356 keV. In contrast, for each pixel in the array, the average and SD FWHM energy resolutions over 64 pixels, measured with a single-anode PMT and a collimator, were 5.8 ± 0.9% at 356 keV. The array was then coupled to a 64-channel multi-anode PMT (Hamamatsu H8500), the anode pitch of which was the same as the LaBr<sub>3</sub>:Ce pixel pitch of 6.1 mm. When the 64 anodes were read out from four channels in a resistor chain by the charge division method, the FWHM energy resolution of all 64 pixels was 7.0 ± 0.5% at 662 keV, whereas that of the inner 6×6 pixels was 5.8 ± 0.4% at 662 keV. In addition, we measured a Gd<sub>2</sub>SiO<sub>5</sub>:Ce (GSO:Ce) scintillator array consisting of 8×8 pixels with a size of 5.9 mm×5.9 mm×13.0 mm to compare its performance with that of the LaBr<sub>3</sub>:Ce array. The FWHM energy resolution of all 64 GSO:Ce pixels was 10.8 ± 0.3% at 662 keV. With these energy resolutions, FWHM angular resolutions of the Compton camera using the LaBr<sub>3</sub>:Ce and GSO:Ce arrays are expected to be 4.6° and 5.3°, respectively, at 662 keV.</div>
</div>
<div class='row'>
<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>anodes; cerium; gadolinium compounds; lanthanum compounds; photomultipliers; position sensitive particle detectors; solid scintillation detectors; 64-channel multianode PMT; Compton camera; FWHM angular resolutions; Gd<sub>2</sub>SiO<sub>5</sub>:Ce; LaBr<sub>3</sub>:Ce; anode pitch; collimator; electron volt energy 0.1 MeV to 1 MeV; electron volt energy 356 keV; electron volt energy 662 keV; full width at half-maximum energy resolutions; pixel pitch; resistor chain; scattered gamma rays; scintillation detectors; scintillator arrays; single anode photomultiplier tube; size 38 mm; standard deviation FWHM energy resolutions; Anodes; Cameras; Collimators; Energy measurement; Energy resolution; Gamma rays; Length measurement; Light scattering; Photomultipliers; Resistors; Array camera; Compton camera; GSO:Ce; LaBr<formula formulatype=)
$_{3}$ :Ce; scintillation detectors;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.2009.2034657
Filename :
5341429
Link To Document :
