DocumentCode :
1413872
Title :
Characteristics of Lu
Gd
SiO
 imaging. Recently, new high lutetium content Lu<sub>1.8</sub>Gd<sub>0.2</sub>SiO<sub>5</sub>:Ce (LGSO-90%Lu) has been produced with Ce concentration varying from 0.025 to 0.75 mol% Ce, yielding decay times in the range of 34.2 to 44.8 ns. These scintillators could potentially be used as phoswich detectors in PET for improving spatial resolution. To validate this assumption, light output, energy resolution, temperature dependence, timing resolution, and pulse-shape discrimination performance were assessed. The light output of these LGSO scintillators is 3.5 to 4.8 times higher than BGO with avalanche photodiode readout [7.5 to 8 times with photomultiplier tube (PMT)] and increases with Ce concentration. The variation of light output for temperature ranging from 10 to 50 <sup>°</sup>C is less than 18% with PMT readout. Energy resolution at 662 keV is about 11% (10%) with avalanche photodiode (APD) (PMT) readout. Timing resolution with APD is ~ 1.65 ns for all samples relative to a fast PMT-plastic detector. Pulse-shape discrimination of LGSO-90% Lu with 0.025 mol% Ce (¿ = 34.2 ns) and 0.75 mol% Ce (¿ = 44.8 ns) was successfully achieved in a <i>phoswich</i> assembly, making this new high lutetium content LGSO with adjustable decay time constants a strong candidate for a high-resolution depth-of-interaction detector intended for PET imaging.</div>
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<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'>avalanche photodiodes; cerium; gadolinium compounds; lutetium compounds; photomultipliers; positron emission tomography; solid scintillation detectors; AD 1993; Lu<sub>1.8</sub>Gd<sub>0.2</sub>Si<sub>0.2</sub>:Ce; PET detector; avalanche photodiode readout; electron volt energy 662 keV; energy resolution; light output; phoswich detectors; photomultiplier tube; positron emission tomography; pulse shape discrimination; scintillator; temperature 10 degC to 50 degC; temperature dependence; time 34.2 ns to 44.8 ns; timing resolution; Assembly; Avalanche photodiodes; Detectors; Energy resolution; Photomultipliers; Positron emission tomography; Spatial resolution; Temperature dependence; Temperature distribution; Timing; APD; CT; PET; SPECT; radiation detector; scintillator;</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>fLanguage : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>English</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Journal_Title : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>Nuclear Science, IEEE Transactions on</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Publisher : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>ieee</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>ISSN : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>0018-9499</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Type : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>jour</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>DOI : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>10.1109/TNS.2009.2034161</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Filename : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>5409994</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Link To Document : </div><div class='valueDiv leftDirection leftAlign fullRecValueEnglish col-xs-8 col-sm-10'><a href='https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=1413872' target='_blank'>https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=1413872</a></div>
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