اندازه گیری آهنگ دز ناشی از تابش زمینه در فضای باز در شهر رشت با استفاده از دزیمتر گازی

نوع مقاله : مقاله کنفرانسی

نویسندگان

1 گروه مهندسی هسته ای-پرتوپزشکی، واحد لاهیجان، دانشگاه آزاد اسلامی، لاهیجان، ایران

2 گروه مهندسی هسته‌ای-پرتو پزشکی، دانشگاه آزاد اسلامی واحد علوم تحقیقات، تهران، ایران

چکیده

پرتوگیری خارجی انسان به واسطه پرتوهای حاصل از منابع طبیعی به مراتب بیشتر از منابع مصنوعی است. در این پژوهش میزان تابش زمینه در فضای باز نقاط مختلف شهر رشت اندازه‌گیری شد و آهنگ دز ناشی از آن محاسبه گردید. در این مطالعه مقطعی، از دستگاه RDS-110 برای اندازه‌گیری میزان تابش زمینه استفاده شد. برای اندازه‌گیری تابش زمینه در ارتفاع یکسان، از یک پایه فلزی به ارتفاع یک متر استفاده شد و دستگاه روی آن قرار گرفت. میزان آهنگ دز معادل تابش زمینه برای فضای باز در نه منطقه (شمال، جنوب، شرق، غرب، مرکز، شمال غربی،شمال شرقی، جنوب غربی و جنوب شرقی) و برای هر نقطه دوازده مرحله در فواصل زمانی 5 دقیقه اندازه گیری شد. میانگین آهنگ دز معادل تابش زمینه و انحراف معیار آن در فضای باز برابر باnSv/h  5/74±79/88 می‌باشد که 34 درصد بیشتر از میانگین جهانی آهنگ دز معادل است. همچنین آهنگ دز موثر سالانه در فضای باز شهر رشت mSv/y 0/007± 0/098 می‌باشد که در مقایسه با میانگین جهانی آهنگ دز موثر در فضای باز مقدار بیشتری را نشان می‌دهد.

کلیدواژه‌ها


عنوان مقاله [English]

Measurement of dose rate due to outdoor radiation in Rasht city by using gas dosimeter

نویسندگان [English]

  • Alireza Azadbar 1
  • Hamed Beigli 2
  • Saeide Hosseini Khortoomi 1
1 Department of Nuclear Engineering, Lahijan Branch, Islamic Azad University, Lahijan, Iran
2 Department of Nuclear Engineering-Radiation Medicine, Islamic Azad University, Science and Research Branch, Tehran, Iran
چکیده [English]

External human radiation due to radiation from natural resources is much more than artificial sources. In this study, the amount of outdoor background radiation was measured in different parts of Rasht city and the dose rate was calculated.
RDS-110 was used to measure background radiation in this cross-sectional study.To measure background radiation at the same height, a metal base with a height of one meter was used and the device was placed on it.Dose rate equivalent to background radiation for outdoor space was measured in nine areas (north, south, east, west, center, northwest, northeast, southwest and southeast) and for each point twelve stages were measured at 5 minutes intervals.The average dose rate equivalent to background radiation and its standard deviation in the outdoor is  79/88±5/74nSv/h which is 34% higher than the global average of the equivalent dose rate.Also, the annual effective outdoor dose rate in Rasht city is 0/098±0/007mSv/y, which shows a higher amount compared to the global average of effective outdoor dose rate.

کلیدواژه‌ها [English]

  • background radiation
  • dose rate
  • outdoor
  • annual effective dose
  • Rasht city
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