مجله سنجش و ایمنی پرتو

مجله سنجش و ایمنی پرتو

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
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