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Application of experimental measurements, Monte Carlo simulation and theoretical calculation to estimate the gamma ray shielding capacity of various natural rocks
Progress in Nuclear Energy ( IF 3.3 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.pnucene.2020.103405
Rashad A R Bantan , M.I. Sayyed , K.A. Mahmoud , Y. Al-Hadeethi

Abstract Experimental measurements and Monte Carlo simulation were applied to simulate the mass attenuation coefficient (MAC) for five various rock samples collected from southwestern Sinai, Egypt. Also, for the same rocks we determined the MAC and exposure buildup factors (EBF and EABF) theoretically using Phy-X/PSD software. The results show that there is adequate agreement between experimental and simulated results as well as with the Phy-X/PSD data. The linear attenuation coefficient (μ) decreases as the photon energy increases. The decrease is dramatically steep for energies bellow 0.3445 MeV and then gradually decreases with further increasing in the energy. Basalt-2 has slightly higher μ than basalt-1 and both rocks have higher μ than limestone (Dike), Basalt sill, and Rhyolite. We also calculated the effective atomic number (Zeff) for the investigated rocks and the Zeff values are in the range of 18.80–23.68, 18.52–23.57, 13.98–20.49, 19.15–23.89 and 22.32–26.68 for baslat-1, basalt-2, dike, basalt-sill and rhyolite respectively. The result showed that basalt-2 possesses the lowest half value layer at all energies followed by basalt-1. The radiation protection efficiency (RPE) at 122 keV is found to be in the range of 34.295–38.982%, while at 662 keV in the range of 17.402–22.886. The obtained results of EBF and EABF showed that limestone (Dike) possess the highest EBF and EABF while samples Basalt-1 and Basalt-2 possess the lowest EBF and EABF among the studied rocks.

中文翻译:

应用实验测量、蒙特卡罗模拟和理论计算来估计各种天然岩石的伽马射线屏蔽能力

摘要 应用实验测量和蒙特卡罗模拟来模拟从埃及西奈半岛西南部采集的五个不同岩石样品的质量衰减系数 (MAC)。此外,对于相同的岩石,我们使用 Phy-X/PSD 软件理论上确定了 MAC 和暴露累积因子(EBF 和 EABF)。结果表明,实验和模拟结果以及 Phy-X/PSD 数据之间存在充分的一致性。线性衰减系数 (μ) 随着光子能量的增加而减小。对于低于 0.3445 MeV 的能量,这种下降非常陡峭,然后随着能量的进一步增加而逐渐下降。玄武岩 2 的 μ 略高于玄武岩 1,两种岩石的 μ 均高于石灰岩(岩脉)、玄武岩窗台和流纹岩。我们还计算了所研究岩石的有效原子序数 (Zeff),basalt-2 的 Zeff 值在 18.80-23.68、18.52-23.57、13.98-20.49、19.15-23.89 和 22.32-26.68 的范围内, , 堤坝, 玄武岩基石和流纹岩。结果表明,basalt-2 在所有能量下均具有最低的半值层,其次是 basalt-1。发现 122 keV 的辐射防护效率 (RPE) 在 34.295-38.982% 的范围内,而在 662 keV 的范围内则为 17.402-22.886。获得的 EBF 和 EABF 结果表明,在所研究的岩石中,石灰岩 (Dike) 具有最高的 EBF 和 EABF,而样品 Basalt-1 和 Basalt-2 具有最低的 EBF 和 EABF。分别为玄武岩和流纹岩。结果表明,basalt-2 在所有能量下均具有最低的半值层,其次是 basalt-1。发现 122 keV 的辐射防护效率 (RPE) 在 34.295-38.982% 的范围内,而在 662 keV 的范围内则为 17.402-22.886。获得的 EBF 和 EABF 结果表明,在所研究的岩石中,石灰岩 (Dike) 具有最高的 EBF 和 EABF,而样品 Basalt-1 和 Basalt-2 具有最低的 EBF 和 EABF。分别为玄武岩和流纹岩。结果表明,basalt-2 在所有能量下均具有最低的半值层,其次是 basalt-1。发现 122 keV 的辐射防护效率 (RPE) 在 34.295-38.982% 的范围内,而在 662 keV 的范围内则为 17.402-22.886。获得的 EBF 和 EABF 结果表明,在所研究的岩石中,石灰岩 (Dike) 具有最高的 EBF 和 EABF,而样品 Basalt-1 和 Basalt-2 具有最低的 EBF 和 EABF。
更新日期:2020-08-01
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