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Effect of annealing atmospheres on the scintillation properties of Ce^(3+)‑doped YAG nanoscintillator

Radiation Detection Technology and Methods 2023年第3期7卷 447-456页

作者： Billel Zahra Lakhdar Guerbous Hicham Bousbia‑salah Allaoua Boukerika Electronic Department Nuclear Research Center of Birine(CRNB)BP 180Ain OusseraDjelfaAlgeria Physics Division Nuclear Research Center of Algiers(CRNA)Algiers 02Bd Frantz FanonBP 39916000 AlgiersAlgeria Electronic Department National Polytechnic School(ENP)10 Rue des Freres OudekBP 18216200 El‑HarrachAlgiersAlgeria

Background In this study,three sample detectors have been prepared by using cerium-activated YAG nanoscintillator(Y_(3)Al_(5)O_(12):Ce^(3+))synthesized by sol-gel method and heat-treat at 900°C for 2 h in different atmospheres such as vacuum,air and *** Many studies about YAG:Ce^(3+)single crystal have been carried out,but the material at the nanoscale remains not enough *** objective of the present paper is to investigate the effects of annealing atmosphere on the scintillation properties and identify the suitable atmosphere that allow to design radiation detectors with high scintillation *** In order to accurately assess the scintillation properties,the nanoscintillator sample powders have been designed as a detector,in which,preparation operations such as surface homogenization and efficiency coupling with photomultiplier tube(PMT)window were *** study was performed usingγ-rays 662 keV released from137Cs radioactive source,the bi-alkali GDB-4FF PMT was used as a *** instrumentation chain was set up in order to collect the pulse height spectra,NaI:Tl single-crystal scintillator was used as a reference detector to estimate the scintillation light *** delayed coincidence method was used for measuring the scintillation decay time of nanoscintillator sample *** The sample detector annealed at vacuum atmosphere exhibits the best scintillation properties,the scintillation light yield was estimated to be 14,600±3400 ph/MeV and the fast component in the scintillation decay was 90 *** The vacuum is the suitable atmosphere which allows the development of radiation detectors with high scintillation efficiency.

关键词： Nanoscintillator YAG:Ce^(3+) Scintillation properties γ-rays 662 keV Photomultiplier tube sample detectors Annealing atmosphere

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