مجله علوم، مهندسی و فناوری هسته‌ای

خواص حفاظتی نانوهیدروکسید‌های آلاییده‌‌شده با آهن در برابر پرتو گاما

نوع مقاله : مقاله پژوهشی

نویسندگان

محمدرضا علی‌پور
مهدی عشقی

گروه فیزیک، دانشکده و پژوهشکده علوم پایه، دانشگاه جامع امام حسین(ع)، صندوق پستی1698715461، تهران- ایران

https://doi.org/10.24200/nst.2024.1643
چکیده
در این پژوهش، خواص حفاظتی پرتوهای گاما نانوهیدروکسید‌‌های آلاییده‌‌شده با آهن، را با محاسبه کمیت‌های تأثیرگذار مانند: لایه نیم‌مقدار (HVL)، مسیر آزاد میانگین (MFP)، ضریب تضعیف جرمی (𝜇m) و ضریب تضعیف خطی (LAC) در محدوده 0/015 تا 15 مگا الکترون‌ولت با استفاده از ابزار شبیه‌‌سازی مونت‌کارلو Geant4 بررسی شده است. برای بررسی تفاوت کمیت ضریب تضعیف جرمی مواد نانویی با مواد معمولی، نتایج شبیه‌سازی با داده‌های مستخرج از پایگاه دادۀ  NIST-XCOMکه تنها قابلیت محاسبه ضریب تضعیف جرمی مواد معمولی را دارد، مقایسه می‌شود. در این مقایسه، اولاً مشاهده می‌شود که داده‌های مستخرج از این پایگاه و نتایج ابزار شبیه‌سازی Geant4 با افزایش غلظت آلاییدگی آهن با یکدیگر متفاوت خواهند بود. ثانیاً، درصد انحراف  (RD)بین داده‌های مستخرج از این پایگاه با نتایج حاصل از ابزار شبیه‌سازی Geant4، از 0/1 به 3/2 درصد افزایش می‌یابد. دلیل این انحراف، افزایش غلظت آلاییدگی نانوآهن در ترکیب می‌باشد. بنابراین، ترکیب نانوهیدروکسید با بالاترین درصد آلاییدگی آهن (48Fe-HAp-)، از نظر چگالی مطلوب‌ترین ترکیب حفاظی را در مقایسه با مواد حفاظ منتخب دیگر دارد که یک ترکیب سبک و آنتی‌باکتریال برای حفاظت از پرتوهای گاما در این ناحیه از انرژی می‌باشد.

کلیدواژه‌ها

پرتو گاما
ابزار شبیه‌سازی Geant4
نانوهیدروکسید
روش مونت‌کارلو

عنوان مقاله English

Shielding properties of iron-doped nano-hydroxides against gamma-rays

نویسندگان English

M.R. Alipoor
M. Eshghi
Department of Physics, Faculty and Research Institute of Basic Sciences, Imam Hossein University (AS), P.O. Box 1698715461, Tehran- Iran
چکیده English

In this research, the gamma ray protective properties of iron-doped nano-hydroxides were evaluated by calculating effective quantities such as the half-value layer (HVL), mean free path (MFP), mass attenuation coefficient (𝜇m) and linear attenuation coefficient (LAC) in the range of 0.015 to 15 MeV using the Geant4 Monte Carlo simulation tool. To investigate the quantitative difference between the mass attenuation coefficient of nano-materials and normal materials, the simulation results were compared with data extracted from the NIST-XCOM database, which can only calculate the mass attenuation coefficient of normal materials. In this comparison, it was observed that the data extracted from the database and the results of the Geant4 simulation tool differed as the concentration of iron contamination increased. The percentage of deviation (RD) between the data extracted from the database and the results of the Geant4 simulation tool increased from 0.1 to 3.2%. This deviation was attributed the increase in the concentration of nano-iron contamination in the composition. Therefore, the nano-hydroxide composition with the highest percentage of iron contamination (Fe-HAp-48) had the most favorable protective composition in terms of density compared to other selected protective materials. This composition, which is lightweight and antibacterial, provides effective protection against gamma rays in the specified energy range.

کلیدواژه‌ها English

Gamma-ray
Geant4 simulator
Nano-hydroxyapatite
Monte Carlo method
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