نوع مقاله: مقاله فنی

نویسندگان

پژوهشکده‌ کاربرد پرتوها، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی، صندوق پستی: 14155-1339، تهران- ایران

10.24200/nst.2021.1191

چکیده

فاصله‌­سنجی به روش پس ­پراکنش کامپتون روشی نوین برای اندازه‌­گیری فاصله بین صفحات فلزی است که می‌­تواند کاربردهای زیادی در صنایع مختلف از جمله صنعت نفت و گاز و پتروشیمی داشته باشد. در این مقاله به ­منظور فاصله‌­سنجی از ورق‌های فولادی با ضخامت‌های 2، 6 و mm 10 به­ عنوان ضخامت‌های کم، متوسط و زیاد استفاده شد. هم‌­چنین با هدف نشان دادن تأثیر انرژی چشمه بر فاصله‌سنجی، دو چشمه Cs137 و Co60 استفاده شده­‌اند. نتایج نشان داد که فاصله‌سنجی به انرژی چشمه گاما وابسته است و برای دقت اندازه‌گیری یکسان، چشمه گاما با انرژی بالاتر قابلیت بیش‌­تری برای اندازه‌گیری فاصله بین دو صفحه فولادی دارد. افزایش انرژی چشمه، دقت اندازه‌گیری را نیز افزایش می‌دهد. علاوه بر انرژی چشمه گاما، فاصله‌سنجی به ضخامت دو صفحه و ترتیب قرارگیری صفحه ضخیم­‌تر نسبت به صفحه نازک‌­تر نیز بستگی دارد. هم‌­چنین با افزایش فاصله بین دو صفحه فلزی، دقت اندازه‌گیری نیز کاهش می‌یابد. به همین دلیل بیشینه فاصله‌سنجی بین دو صفحه، با در نظر گرفتن دقت اندازه‌گیری، به مقدار cm 1 درنظر گرفته شده است.

کلیدواژه‌ها

عنوان مقاله [English]

Distance measuring of steel plates by 137Cs and 60Co sources

نویسندگان [English]

  • M.T. Sasanpour
  • M. Sharifzadeh
  • A. Taheri
  • M. Askari

Radiation Application Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 1339-14155, Tehran - Iran

چکیده [English]

Distance measuring between two metal plates by γ-ray backscattering is a new method that is applicable for different industries, especially the oil, gas, and petrochemical industry. In the present work, 2, 6, and 10 mm thick steel plates were used as thin, medium, and thick plates to perform the experiments. Also, two sources of 137Cs and 60Co have been used to show the effect of source energy on the accuracy of the measurements. The results showed that the distance measurement depends on the Gamma-ray energy, and for the same measurement accuracy, the Gamma source with higher energy would be more applicable for measuring the distance between two steel plates. Moreover, it was found that increasing the γ-ray energy will increase the accuracy of the measurement. In addition to the energy of the gamma source, the distance measurement depends on the thickness of the two plates, the arrangement of the thicker plate comparing to the thinner ones, and the distance between them. Finally, increasing the distance between the plates leads to reducing the measurement accuracy, which was calculated to be one centimeter.

کلیدواژه‌ها [English]

  • Distance measuring
  • Compton backscattering
  • 137Cs
  • 60Co
  • Steel plates

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