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.

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.

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.

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.

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.

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.

Measurement Mass Attenuation Coefficient of Palmitic Acid by Using Sources of Gamma Ray

2021 ◽  
Vol 19 (6) ◽  
pp. 107-114
Author(s):  
Mohammed Yahya Hadi ◽  
Ali Hussein F. Alnasraui ◽  
Ali Adil Turki Aldalawi
Keyword(s):  
Attenuation Coefficient ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Radiation Force ◽  
Mass Attenuation Coefficient ◽  
Fluorescence Detector ◽  
Effective Electron ◽  
Effective Atomic Numbers ◽  
Gamma Ray Detector ◽  
Mass Attenuation

The purpose of this paper is to determine the mass attenuation coefficient (μ/ρ), of a sample. In this work used (C16H32O2) fatty acid, exposed to gamma rays (γ), emitted from various sources 57Co, 133Ba, 22Na, 137Cs, 54Mn, and sCo with energies from 0.122 to 1.330 MeV. It exposes the compound to gamma rays and discloses the radiation force that passes through the sample, the rest of the gamma radiation attenuated. A NaI fluorescence detector (Tl) with an accuracy of 8.2% (at 662 kV) was used for the gamma ray detector beam. An advantage of using (μ/ρ) coefficient data can be obtained effective atomic numbers, atomic cross-section and effective electron densities.

scholarly journals What do Gamma Rays tell us about the ISM?: New Insight from the Compton Observatory

1996 ◽  
Vol 169 ◽  
pp. 437-446 ◽  
Author(s):  
Hans Bloemen
Keyword(s):  
Interstellar Medium ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Line Emission ◽  
Cosmic Ray ◽  
Gamma Ray Astronomy ◽  
Early Results ◽  
The Galaxy ◽  
Γ Ray ◽  
Insight Into

Gamma-ray astronomy has become a rich field of research and matured significantly since the launch of NASA's Compton Gamma Ray Observatory in April 1991. Studies of the diffuse γ-ray emission of the Galaxy can now be performed in far more detail and extended into the MeV regime, including both continuum and line emission. These studies provide unique insight into various aspects of the interstellar medium, in particular of the cosmic-ray component. This paper gives a brief review on the diffuse Galactic γ-ray emission and summarizes early results and prospects from the Compton Observatory.

scholarly journals The Flare of 1989 September 9, 09:09 UT: Does Coronal Loop Collision Initiate Efficient Gamma-Ray Emission?

1994 ◽  
Vol 142 ◽  
pp. 707-711
Author(s):  
H. Aurass ◽  
A. Hofmann ◽  
E. Rieger
Keyword(s):  
Current Sheet ◽  
Gamma Rays ◽  
Coronal Loop ◽  
Gamma Ray ◽  
High Energy ◽  
X Rays ◽  
Subject Headings ◽  
Γ Ray ◽  
Gamma Ray Emission ◽  
Magnetogram Data

AbstractVector magnetogram data and Hα pictures together with data published by Chupp et al. lead us to conjecture that in the presented case a contact between the rising two-ribbon flare current sheet and a coronal loop connecting two nearby plage regions initiates efficient high-energy γ-ray emission.Subject headings: Sun: corona — Sun: flares — Sun: X-rays, gamma rays

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