Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 377, Issue -, Pages 89-93Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2016.04.017
Keywords
Scintillation; Photoluminescence; Thermally stimulated luminescence; Optically stimulated luminescence; Strontium aluminate; Cerium; Single crystal
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of the Japanese government (MEXT) [26249147]
- Murata Science Foundation
- KRF foundation
- Research Institute of Electronics, Shizuoka University
- JST A-step
- Grants-in-Aid for Scientific Research [26249147] Funding Source: KAKEN
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In this study, Ce-doped SrAl2O4 (Ce:SrAl2O4) crystals were prepared by a floating zone (FZ) method and experimental evaluations were performed for scintillator applications. In photoluminescence (PL) with an excitation around 320 nm, an intense broad emission peak appears around 380 nm due to the 5d-4f transitions. The PL decay time constants are approximately 30 ns. The X-ray induced scintillation spectrum also shows an intense broad emission peak around 380 nm. Among the samples evaluated with different concentrations of Ce, the absolute light yield under Cs-137 is considerably high (similar to 3900 ph/MeV) when the concentration of Ce is 1.0%. In thermally stimulated luminescence (TSL) after X-ray irradiation, strong TSL glow peaks are observed at 110, 210 and 330 degrees C. The samples also shows optically stimulated luminescence (OSL) after X-ray irradiation, in which the emission appears around 380 nm due to the 5d-4f emission bands of Ce3+ while the samples is exposed to the stimulation light at 655 nm. (C) 2016 Elsevier B.V. All rights reserved.
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