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A new heavy-mineral doped clay brick for gamma-ray protection purposes
Applied Radiation and Isotopes ( IF 1.6 ) Pub Date : 2021-04-20 , DOI: 10.1016/j.apradiso.2021.109720
Karem A Mahmoud 1 , Oleg L Tashlykov 2 , M H A Mhareb 3 , Aljawhara H Almuqrin 4 , Y S M Alajerami 5 , M I Sayyed 6
Affiliation  

The present work novelty pointed to fabricate new clay bricks doped with heavy minerals to be used in the building materials as a candidate for radiation shielding. The bricks were manufactured as (y)Iron mineral+ (1-y)clay, where y = 0, 0.1, 0.2 and 0.3 fractional weight. The prepared bricks' chemical composition and density were introduced to the MCNP-5 code to assess the prepared bricks' protection capacity. The simulated linear attenuation coefficient (LAC) was confirmed by comparing the simulated results with those calculated by the Phy-X/PSD program. We found that the simulated and calculated LAC were close together. The diff (%) between the MCNP-5 and Phy-X/PSD is in the range ±2% for all the fabricated bricks. The maximum LAC values occurred at 0.015 MeV, varied between 21.540 and 39.553 cm−1 for bricks N0 and N30. The lowest LAC achieved at 15 MeV varied between 0.068 and 0.090 cm−1. Bricks without heavy mineral addition have the lowest LAC values at all energies, ranging from 21.540 cm−1 to 0.068 cm−1, while bricks with 30 wt% heavy minerals have the highest LAC. The half-value layer (HVL) values decreased gradually with increasing the mineral ratio in the fabricated bricks. The thinner brick HVL achieved for the sample N 30 with 30 wt % heavy mineral, growing from 0.017 to 7.675 cm. The effective atomic number (Zeff) was reported, and we found that the minimum Zeff values equal to 14.006, 14.865, 15.705, and 16.394 for bricks N 0, N 10, N 20, N 30, respectively.



中文翻译:

一种用于伽马射线防护的新型重矿物掺杂粘土砖

目前的工作新颖之处在于制造掺有重矿物的新型粘土砖,用于建筑材料作为辐射屏蔽的候选材料。砖被制造为 (y)铁矿物+ (1-y)粘土,其中 y = 0、0.1、0.2 和 0.3 分数权重。制备的砖的化学成分和密度被引入到 MCNP-5 规范中,以评估制备的砖的保护能力。通过将模拟结果与 Phy-X/PSD 程序计算的结果进行比较,确认了模拟的线性衰减系数 (LAC)。我们发现模拟和计算的 LAC 很接近。对于所有制造的砖,MCNP-5 和 Phy-X/PSD 之间的差异 (%) 在 ±2% 的范围内。最大 LAC 值出现在 0.015 MeV,N0 和 N30 砖在 21.540 和 39.553 cm -1之间变化。在 15 MeV 达到的最低 LAC 在 0.068 和 0.090 cm -1之间变化。不添加重矿物的砖在所有能量下的 LAC 值最低,范围为 21.540 cm-1到 0.068 cm -1,而含有 30 wt% 重矿物的砖具有最高的 LAC。半值层(HVL)值随着砖中矿物比例的增加而逐渐降低。具有 30 wt% 重矿物的样品 N 30 获得的较薄砖 HVL,从 0.017 厘米增加到 7.675 厘米。报告了有效原子序数 (Z eff ),我们发现砖 N 0、N 10、N 20、N 30的最小 Z eff值分别等于 14.006、14.865、15.705 和 16.394。

更新日期:2021-04-21
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