Luminescence and Scintillation Properties of Ce-Doped YAP and LuYAP Crystals

2011 ◽  
Vol 199-200 ◽  
pp. 1789-1795 ◽  
Author(s):  
Akapong Phunpueok ◽  
Weerapong Chewpraditkul ◽  
Pichet Limsuwan ◽  
Chalerm Wanarak
Keyword(s):  
Energy Resolution ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Light Yield ◽  
Emission Spectra ◽  
Photomultiplier Tube ◽  
Intrinsic Resolution ◽  
Measured Energy ◽  
Uv Excitation

The luminescence and gamma-ray detection properties of cerium-doped scintillators, namely, Lu0.3Y0.7AlO3:Ce (Lu0.3Y0.7AP:Ce), Lu0.7Y0.3AlO3:Ce (Lu0.7Y0.3AP:Ce ), and YAlO3:Ce (YAP:Ce) were investigated. UV excitation and emission spectra of studied crystals were compared. The light yield and energy resolution were measured using photomultiplier tube (PMT) readout. The light yield non-proportionality and energy resolution versus gamma-ray energy were measured and the intrinsic resolution of the crystals was determined after correcting the measured energy resolution for PMT statistics. For 662 keV gamma rays (137Cs source), YAP: Ce showed the highest light yield of 28,500 ph/MeV and the best energy resolution of 4.4 % , while its photofraction is worst.

Comparison of Lu0.7Y0.3AP:Ce and Bi4Ge3O12 Scintillators in Gamma Ray Spectrometry

2011 ◽  
Vol 284-286 ◽  
pp. 2008-2013
Author(s):  
Akapong Phunpueok ◽  
Weerapong Chewpraditkul ◽  
Pichet Limsuwan ◽  
Bing Kun Yu ◽  
Chalerm Wanarak
Keyword(s):  
Energy Resolution ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Light Yield ◽  
Photomultiplier Tube ◽  
Gamma Ray Spectrometry ◽  
Intrinsic Resolution ◽  
Measured Energy ◽  
Scintillation Crystals ◽  
Better Than

The scintillation response of Lu0.7Y0.3AP:Ce and Bi4Ge3O12 scintillation crystals have been compared using photomultiplier tube readout for photon energies ranging from 22.1 to 1274.5 keV. Lu0.7Y0.3AP:Ce showed a light yield non-proportionality of about 20% upon lowering energy from 1,274.5 to 22.1 keV, which is better than that of about 39% obtained for Bi4Ge3O12. Lu0.7Y0.3AP:Ce showed the light yield of 13,400 ph/MeV and energy resolution of about 8 % for 662 keV gamma rays from a 137Cs source. The photofraction of Bi4Ge3O12 is better than that of Lu0.7Y0.3AP:Ce. The intrinsic resolution of the crystals versus energy of gamma rays has been determined after correcting the measured energy resolution for photomultiplier tube statistics.

Luminescence and Scintillation Properties of Ce-Doped LYSO and YSO Crystals

2011 ◽  
Vol 199-200 ◽  
pp. 1796-1803 ◽  
Author(s):  
Chalerm Wanarak ◽  
Weerapong Chewpraditkul ◽  
Akapong Phunpueok ◽  
Jakrapong Kaewkhao
Keyword(s):  
Rare Earth ◽  
Energy Resolution ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Light Yield ◽  
Mass Attenuation Coefficient ◽  
Significant Progress ◽  
Transmission Method ◽  
Intrinsic Resolution ◽  
Γ Ray

The luminescence and gamma-ray detection properties of the new cerium-doped rare-earth scintillator lutetium-yttrium oxyorthosilicate ( Lu1.95Y0.05SiO5:Ce, LYSO:Ce) were investigated and compared to those of cerium-doped yttrium oxyorthosilicate ( Y2SiO5:Ce, YSO:Ce) crystal. The light yield and energy resolution were measured using photomultiplier tube (PMT) readout. The non-proportionality of the light yield and energy resolution versus γ-ray energy were measured and the intrinsic resolution of the crystals was calculated. In spite of significant progress in light yield and luminescence properties, the energy resolution of LYSO:Ce appears to still suffer from an excess variance in the number of scintillation photons. The mass attenuation coefficient of LYSO:Ce and YSO:Ce for 662 keV gamma rays was also measured by transmission method and compared with the theoretical values calculated by WinXCom program.

Comparative Studies of the Light Yield Non-Proportionality and Energy Resolution of CsI(Tl), LYSO and BGO Scintillation Crystals

2016 ◽  
Vol 872 ◽  
pp. 266-270
Author(s):  
Pruittipol Limkitjaroenporn ◽  
Narong Sangwaranatee ◽  
Wuttichai Chaiphaksa ◽  
Jakrapong Kaewkhao
Keyword(s):  
Energy Resolution ◽  
Comparative Studies ◽  
Gamma Ray ◽  
Light Yield ◽  
Good Energy Resolution ◽  
Intrinsic Resolution ◽  
Scintillation Crystals ◽  
Good Energy ◽  
Better Than

This article, for comparison, the non-proportionality of light yield and energy resolution of BGO, LYSO and CsI(Tl) scintillators couple to the R1306 PMT readouts were investigated. At 662 keV from 137Cs source, the good energy resolution of 7.13% for CsI(Tl) superior than LYSO and BGO scintillators. The energy resolution on gamma-ray energy was also evaluated to expose the scintillator intrinsic resolution parameters. For non-proportionality of light yield, the study showed a light yield non-proportionality 0.35% of LYSO, the value is better than 4.82 % for CsI(Tl) and 1.53 % of BGO scintillators.

Scintillation Properties of Ce-Doped LuYAP Crystal for Gamma Ray Detection

2015 ◽  
Vol 804 ◽  
pp. 93-96
Author(s):  
Akapong Phunpueok ◽  
Voranuch Thongpool ◽  
Weerapong Chewpraditkul
Keyword(s):  
Energy Resolution ◽  
Gamma Ray ◽  
Light Yield ◽  
High Energy ◽  
Stopping Power ◽  
Strongly Correlated ◽  
Photon Yield ◽  
Good Energy Resolution ◽  
Intrinsic Resolution ◽  
Good Energy

In the present day, inorganic scintillating crystals become a main part in detection and spectroscopy of nuclear particles and high energy photons, more spectively in X/g-ray imaging. The good properties for the scintillating crystals used in these applications require high photon yield, high stopping power, good energy resolution, good light yield proportionality, and minimal afterglow. The main useful of Ce-doped Lu0.7Y0.3AlO3 (LuYAP(Ce)) are high stopping power and non-hygroscopic which are expected to be key ingredients for medical imaging. In this work, we studied the light yield non-proportionality and energy resolution of LuYAP(Ce) crystal with the energy range from 31 to 1,274.5 keV using photomultiplier tube (PMT) readout. The intrinsic resolution of the LuYAP(Ce) crystal has been determined after correcting the measured PMT resolution. The results showed that the non-proportional response of the crystals was strongly correlated with the intrinsic resolution of the crystals.

Comparison of Lu3Al5O12:Ce and LaBr3:Ce Scintillators in Gamma-Ray Spectrometry

2011 ◽  
Vol 418-420 ◽  
pp. 922-927
Author(s):  
Weerapong Chewpraditkul ◽  
Chalerm Wanarak ◽  
Marek Moszynski ◽  
Lukasz Swiderski
Keyword(s):  
Energy Resolution ◽  
Gamma Ray ◽  
Light Yield ◽  
Gamma Ray Spectrometry ◽  
Timing Resolution ◽  
Intrinsic Resolution ◽  
Γ Rays ◽  
Γ Ray ◽  
Coincidence Timing ◽  
Better Than

The performances of Ce-doped Lu3Al5O12(LuAG:Ce) and LaBr3(LaBr3:Ce) scintillators were compared for γ-ray detection using photomultiplier tube ( XP5500B PMT) readout. For 662 keV γ-rays (137Cs source), an energy resolution of 3.5% obtained for LaBr3:Ce is much better than that of 6.7% obtained for LuAG:Ce, while the estimated photofraction of 28.0% for LuAG:Ce is higher than that of 16.2% for LaBr3:Ce. The light yield non-proportionality and energy resolution versus γ-ray energy were measured and the intrinsic resolution of the crystals was calculated. The coincidence timing resolution, obtained in this work for 511 keV annihilation quanta, was 583 ps and 204 ps, respectively, for LuAG:Ce –BaF2and LaBr3:Ce – BaF2detectors.

Light Yield Non-Proportionality and Energy Resolution of Lu1.8Y0.2SiO5:Ce and LaCl3:Ce Scintillation Crystals

2011 ◽  
Vol 284-286 ◽  
pp. 2002-2007 ◽  
Author(s):  
Chalerm Wanarak ◽  
Weerapong Chewpraditkul ◽  
Akapong Phunpueok
Keyword(s):  
Energy Resolution ◽  
Light Yield ◽  
Photomultiplier Tube ◽  
Intrinsic Resolution ◽  
Scintillation Crystals ◽  
Better Than

The scintillation response of Lu1.8Y0.2SiO5:Ce (LYSO:Ce) and LaCl3:Ce scintillators were compared under g-ray excitation using photomultiplier tube (PMT) readout. For 662 keV g-rays (137Cs source), energy resolution of 4.5±0.2% obtained for LaCl3:Ce coupled to XP5200B PMT is much better than that of 8.2±0.4% for LYSO:Ce. The non-proportionality of the light yield and energy resolution versus g-ray energy were measured and the intrinsic resolution of the crystals was calculated. Special attention was devoted to the correlation between intrinsic resolution and non-proportional response of scintillators.

Light Yield Non-Proportionality and Energy Resolution of BGO and CsI(Tl) Scintillation Crystals

2014 ◽  
Vol 979 ◽  
pp. 285-288 ◽  
Author(s):  
Wuttichai Chaiphaksa ◽  
Narongchai Boonyopakorn ◽  
Jakrapong Kaewkhao ◽  
Pruittipol Limkitjaroenporn
Keyword(s):  
Cross Section ◽  
Energy Resolution ◽  
Gamma Ray ◽  
Light Yield ◽  
Photomultiplier Tube ◽  
Cross Section Ratio ◽  
Analysis Program ◽  
Section Ratio ◽  
Scintillation Crystals ◽  
Inorganic Scintillators

This work was investigated on gamma ray scintillation response of inorganic scintillators. BGO and CsI(Tl) was carried out in the energies ranging from 59 keV to 1332 keV. The scintillation responses of the crystals were measured using photomultiplier tube (R1306 PMT) readout. The light yield non-proportionality and energy resolution were analyzed with Gamma Acquisition & Analysis program. The photofraction for both crystals was determined and compared with the cross-section ratio which calculated by WinXCom program.

Lu1.8Y0.2SiO5:Ce and LaCl3:Ce Scintillators for Gamma-Ray Detection

2011 ◽  
Vol 284-286 ◽  
pp. 2064-2069
Author(s):  
Weerapong Chewpraditkul ◽  
Chalerm Wanarak ◽  
Marek Moszynski ◽  
Tomasz Szczesniak ◽  
Lukasz Swiderski
Keyword(s):  
Energy Resolution ◽  
Gamma Ray ◽  
Light Yield ◽  
Timing Resolution ◽  
Intrinsic Resolution ◽  
Coincidence Timing ◽  
Better Than

The scintillation properties of Lu1.8Y0.2SiO5:Ce (LYSO:Ce) and LaCl3:Ce scintillators were studied under g-ray excitation. For 662 keV g-rays (137Cs source), energy resolution of 4.5% obtained for LaCl3:Ce coupled to XP5200B PMT is much better than that of 8.2% for LYSO:Ce. The estimated photofraction of 26.1% at 662 keV for LYSO:Ce is higher than that of 15.7 % for LaCl3:Ce. The non-proportionality of the light yield and energy resolution versus g-ray energy were measured and the intrinsic resolution of the crystals was calculated. The coincidence timing resolution, obtained in this work for 511 keV annihilation quanta, was 222 and 229 ps, respectively, for LYSO:Ce – and LaCl3:Ce – based detectors in coincidence with a BaF2detector.

scholarly journals Bismuth-Loaded Polymer Scintillators for Gamma Ray Spectroscopy

2011 ◽  
Vol 1341 ◽  
Author(s):  
Benjmain L. Rupert ◽  
Nerine J. Cherepy ◽  
Benjamin W. Sturm ◽  
Robert D. Sanner ◽  
Zurong Dai ◽  
...  
Keyword(s):  
Energy Resolution ◽  
Gamma Ray ◽  
Light Yield ◽  
Equal Weight ◽  
Emission Maximum ◽  
Transmission Electron ◽  
Gamma Ray Spectroscopy ◽  
Small Clusters ◽  
Better Than ◽  
Triplet Harvesting

ABSTRACTWe synthesize a series of polyvinylcarbazole (PVK) monoliths containing varying loadings of triphenyl bismuth as a high-Z dopant and varying fluors, either organic or organometallic, in order to study their use as scintillators capable of gamma ray spectroscopy. A trend of increasing bismuth loading resulting in a better resolved photopeak is observed. For PVK parts with no fluor or a standard organic fluor, diphenylanthracene (DPA), increasing bismuth loading results in decreasing light yield while with samples 1 or 3 % by weight of the triplet harvesting organometallic fluor bis(4,6-difluoropyridinato-N,C2)picolinatoiridium (FIrpic) show increasing light yield with increasing bismuth loading. Our best performing PVK/ BiPh3/FIrpic scintillator with 40 wt % BiPh3 and 3 wt % FIrpic has an emission maximum of 500 nm, a light yield of ∼30,000 photons/MeV, and energy resolution better than 7% FWHM at 662 keV. Replacing the Ir complex with an equal weight of DPA produces a sample with a light yield of ∼6,000 photons/MeV, with an emission maximum at 420 nm and energy resolution of 9% at 662 keV. Transmission electron microscopy studies show that the BiPh3 forms small clusters of approximately 5 nm diameter.

Luminescence and Scintillation Characteristics of Gd2SiO5: Ce Single Crystal Scintillator

2016 ◽  
Vol 675-676 ◽  
pp. 772-775
Author(s):  
Nattasuda Yawai ◽  
Weerapong Chewpraditkul ◽  
Kriangkrai Wantong ◽  
Martin Nikl
Keyword(s):  
Single Crystal ◽  
Energy Resolution ◽  
Gamma Ray ◽  
Light Yield ◽  
Mass Attenuation Coefficient ◽  
Transmission Method ◽  
Light Loss ◽  
Good Energy ◽  
Γ Rays ◽  
Crystal Scintillator

The luminescence and gamma-ray detection properties of Gd2SiO5: Ce single crystal scintillator were investigated. The light yield (LY) and energy resolution were measured using R6231 photomultiplier. At 662 keV γ-rays, high LY of 10,300 photons /MeV and good energy resolution of 6.4 % were obtained. The intrinsic LY and light loss coefficient under excitation with 662 keV γ-rays were evaluated. The mass attenuation coefficient for 662 keV γ-rays was also measured by transmission method and compared with the theoretical value calculated by WinXCom program.

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