选定热带树种对50-150 keV范围内x射线辐射屏蔽性能的研究

S. Aggrey-Smith, K. Preko, F. Owusu, J. Amoako
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引用次数: 6

摘要

本文根据20种热带硬木的线性衰减、质量衰减和半值层(HVL)特性,对能量为50-150 keV的Cs-137窄准直x射线的衰减系数进行了比较。窄准直光束法使光子的多重和小角度散射的校正变得不必要。这种衰减取决于木材的化学成分和密度。在50 ~ 150 keV条件下,各树种的线性衰减系数最大的是大carpa翼蒿(4.53 m−1),最小的是非洲凤梨(1.24 m−1);质量衰减系数最高的是铁丝鳉(17.62 m2/kg),最低的是白草鳉(2.27 m2/kg)。在150 keV以下的低x射线辐射中,厚度约为0.36 m的大翼鱼可以代替铅、铜或混凝土,作为一种更经济的辐射屏蔽材料,抵御二次散射和泄漏辐射。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study of Radiation Shielding Properties of selected Tropical Wood Species for X-rays in the 50-150 keV Range
This paper compares the attenuation coefficients of 20 tropical hard wood species based on their linear and mass attenuation and half value layer (HVL) properties for X-rays of energy 50–150 keV using a narrow collimated beam from a Cs-137 source. The narrow collimated beam method made corrections from multiple and small-angle scatterings of photons unnecessary. The attenuation depended on the chemical composition and densities of the wood species. The linear attenuation coefficients of wood species at 50–150 keV were highest for Pterygota macrocarpa (4.53 m−1) and lowest for Antiaris africana (1.24 m−1); the mass attenuation coefficient was highest for Triplochiton scleroxylon (17.62 m2/kg) and lowest for Nesogordonia papaverifera (2.27 m2/kg).The HVL was highest for Antiaris africana (0.27 m) and lowest for Pterygota macrocarpa (0.149 m). Pterygota macrocarpa of about 0.36 m thickness could serve as a more affordable radiation shielding material against secondary scatter and leakage radiations in place of lead, copper or concrete for low X-ray radiations up to 150 keV.
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