سنتز و بررسی خواص ترمولومینسانس نانوساختارآلومینا برای اندازه‌گیری دزهای بالا

نویسندگان

دانشگاه شیراز

چکیده

در این تحقیق نمونه آلومینا به روش احتراق در محلول، سنتز و مشخصات ترمولومینسانس آن برای دزیمتری در دزهای بالای پرتوگاماموردبررسی قرارگرفته است. ساختار و مورفولوژی ذراتبا آنالیز XRDو SEM مورد بررسی قرار گرفتند. نتایج تشکیل آلومینا در فاز آلفا و ذرات پولکی شکل باضخامت نانومتری را نشان می­دهد.همچنین برخی خواص ترمولومینسانسی نمونه سنتز شده همچون منحنی تابشی، بررسی تکرارپذیری، اثر محوشدگی و پاسخ خطی ترمولومینسانسی آن تحت تابش گاما با چشمه کبالت-60 موردبررسی قرار گرفت. با توجه به نتایج به‌دست‌آمده نمونه سنتز شده پاسخ خطی خوبی را در محدوده دزهای تابشی بالا تا حدود kGy4 نشان می­دهد؛ بنابراین می­تواند کاندیدای خوبی برای دزیمتری دزهای بالای پرتوگاما باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Synthesis and thermoluminescence properties investigation of nano-structured alumina for high dose measurement

نویسندگان [English]

  • Razieh Minaei
  • Ahmad Pirouzmand
  • Mansour Rahsepar
چکیده [English]

In this study, nanostructured alumina was synthesized by solution combustion method and its thermoluminescence properties was investigated. X-raydiffraction (XRD) and scanning electron microscopy (SEM) were conducted to investigate the crystal structure, morphology and the particle size of the powders. It was observed that nano structured α-Al2O3 particles with nano flake morphology and thickness of 50-90 nm were formed. The samples were exposed by gamma rays of 60Co radioactive source. The samples reproducibility and fading effect were investigated as well. The results of TL glow curves illustrated a prominent peak at around 187°C. It was revealed that the Al2O3 sample exhibited a linearity response in a wide range of doses (up to 4 kGy) that make it a good candidate for high dose dosimetry measurements.
 

کلیدواژه‌ها [English]

  • Thermoluminescence
  • Nanophosphors
  • Alumina
  • High Dose Measurement

مراجع

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