تفکیک دز نوترون و گاما در میدان‌های آمیختۀ( n-γ (Am-Be, 137Cs) با استفاده از دزیمتر TLD-500

نویسندگان

دانشگاه کاشان

10.22052/3.1.13

چکیده

در این تحقیق، امکان استفاده از دزیمتر Al2O3:C-α (TLD-500) برای تخمین دز گاما در میدان‌های مرکب نوترون و گاما با استفاده از روش نسبت دو قله بررسی شد. قلۀ اصلی این دزیمتر از دو قله همپوش تشکیل شده است. نسبت شدت گرماتابی قلۀ 2 به قلۀ 1 این دزیمتر در میدان خالص گاما (137Cs) 49/1 و برای میدان نوترون Am-Be این نسبت 12/1 به‌دست آمد. قرص ‌های TLD-500 مشخص به‌طور جداگانه، از 7 درصد تا 48 درصد دز کل در 6 مرحله پرتودهی شدند. نتایج به‌دست‌آمده موفقیت استفاده از این دزیمتر در روش نسبت دو قله را نشان می‌دهند.

کلیدواژه‌ها

عنوان مقاله [English]

Theseparation of gamma and neutron doses inmixed gamma-neutron radiation fieldusing α-Al2O3:C (TLD-500) dosimeter

نویسندگان [English]

  • Ehsan sadeghi
  • Mostafa zahedifar
  • Mohsen Mehrabi
چکیده [English]

The possibility of employing α-Al2O3:C (TLD-500) for estimation of gamma dose in mixed n-γ radiation fields by two peak method has investigated. It was found that the main peak can be reliably deconvoluted to two component glow peaks. The ratio of peak 2 to peak 1 in pure gamma ray radiation field (137Cs) is 1.49 whereas irradiation by Am-Be neutrons results in a ratio of 1.12. The precision of the evaluation was investigated by separately irradiating TLD-500 chips to known gamma dose from 7% out of the total dose up to 48% during six steps. Results show that this phosphor can successfully be applied for mixed field dosimetry using two peak method.

کلیدواژه‌ها [English]

  • Thermoluminescence
  • Neutron dosimetry
  • α-Al2O3:C
  • Tow peak method
  • Mixed field

مراجع

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