| Autor: |
Martin Nikl, Akapong Phunpueok, Chalerm Wanarak, W. Chewpraditkul, Jiri Mares, Krittiya Sreebunpeng, Karel Nejezchleb |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 286:85-88 |
| ISSN: |
0168-583X |
| DOI: |
10.1016/j.nimb.2011.11.033 |
| Popis: |
In this paper, we present the scintillation responses of Pr3+-doped Lu3Al5O12 single crystals grown by the Czochralski method with different Pr3+ concentration of 0.19, 0.31, and 0.43 mol% in the crystal. The light yield and energy resolution were measured using photomultiplier tube (XP5200B PMT) readout. High light yield of 15,900 photons per MeV and an energy resolution of 6.5% for 662 keV γ-rays (137Cs source) were obtained with the LuAG:Pr (0.19%) crystal. The variation of light yield and energy resolution with praseodymium concentration was also observed. The light yield non-proportionality and energy resolution versus γ-ray energy were measured and the intrinsic resolution was calculated after correcting the measured energy resolution for PMT statistics. Very good proportionality of the light yield was found within 5% over the energy range from 1274.5 keV down to 32 keV. The estimated photofraction for LuAG:Pr in the pulse height spectra of 320 and 662 keV γ-rays was also determined and compared with the ratio of the cross-sections for the photoelectric effect to the total one calculated using WinXCom program. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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