بررسی تجربی خطی بودن پاسخ یک کالریمتر جدید بر پایه نانوکامپوزیت پلی استایرن/نانولوله کربنی چند دیواره در ناحیه پرتوفرآوری

نوع مقاله : مقاله کنفرانسی

نویسندگان

1 پژوهشکده کاربرد پرتوها، پژوهشگاه علوم و فنون هسته‌ای، کرج، ایران

2 دفتر حفاظت در برابر اشعه، مرکز نظام ایمنی هسته‌ای کشور، سازمان انرژی اتمی، تهران، ایران

3 پژوهشکده کاربرد پرتوها، پژوهشگاه علوم و فنون هسته‌ای، تهران، ایران

چکیده

در پژوهش‌های پیشین نوع جدیدی از دزیمترهای تابشی گاما بر پایه ماده نانوکامپوزیت پلیمر/ نانوساختارهای کربنی توسط نویسندگان ارائه و هم‌چنین ویژگی‌های دزیمتری برای این نوع دزیمتر بررسی شده است. در این کار تجربی، مقاومت الکتریکی نمونه نانوکامپوزیت پلی‌استایرن/ نانولوله کربنی چنددیواره MWCNT-PS wt% 28/0 در محدوده دمایی ºC 75-25 اندازه‌گیری شد. اساس کار یک کالریمتر برمبنای افزایش دمای حجم حساس در اثر پرتودهی است. نتایج نشان داد که با افزایش دما، مقاومت الکتریکی نانوکامپوزیت به‌صورت خطی افزایش یافته و با توجه به روابط کالریمتری می‌تواند به‌عنوان یک کالریمتر در ناحیه پرتوفرآوری برای اندازه‌گیری دز جذبی تا حدود kGy 50 مورد استفاده قرار گیرد.

کلیدواژه‌ها


عنوان مقاله [English]

Experimental evaluation of the linearity response of a new calorimeter based on Polystyrene/Multi-Walled Carbon Nanotube nanocomposite in the radiation processing region

نویسندگان [English]

  • Armin Mosayebi 1
  • Shahryar Malekie 1
  • Abbas Rahimi 2
  • Farhood Ziaie 3
  • Nasrin Sheikh 3
1 Radiation Application Research School, Nuclear Science and Technology Research Institute, Karaj, Iran
2 Radiation Protection Office, Iran Nuclear Regulatory Authority (INRA), Atomic Energy Organization, Tehran, Iran
3 Radiation Application Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
چکیده [English]

In the previous studies, a new type of gamma radiation dosimeter based on polymer/carbon nanostructures nanocomposite has been presented by the authors and also the dosimetric properties for this type of dosimeter have been investigated. In this experimental work, the electrical resistance of 0.28wt% Polystyrene/Multi-Walled Carbon Nanotube (PS/MWCNT) nanocomposite was measured at the temperature range of 25-75 °C. The work of a calorimeter is based on increasing the temperature of the sensitive volume due to irradiation. Results showed that with increasing the temperature, the electrical resistance of the nanocomposite was increased linearly and due to calorimetric relationships could be used as a calorimeter in the radiation processing region to measure the absorbed dose up to about 50 kGy.   

کلیدواژه‌ها [English]

  • Polystyrene/Multi-Walled Carbon Nanotube nanocomposite
  • Calorimeter
  • Electrical resistance
  • Radiation processing
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