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首页> 外文期刊>Radiation Physics and Chemistry >Mass attenuation coefficients of X-rays in different barite concrete used in radiation protection as shielding against ionizing radiation
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Mass attenuation coefficients of X-rays in different barite concrete used in radiation protection as shielding against ionizing radiation

机译：辐射防护中不同晶石混凝土X射线的质量衰减系数作为电离辐射的屏蔽

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The probability of a photon interacting in a particular way with a given material, per unit path length, is usually called the linear attenuation coefficient (mu), and it is of great importance in radiation shielding. Plates of barite concrete with different thickness were fabricated in order to determining their mass attenuation coefficients at different energies. The plates were irradiated with ISO X-ray beams (N60, N80, N110 and N150), generated by Pantak HF320 X-ray equipment, at the IPEN laboratory. The mass attenuation coefficients of barite concrete have been measured using X-ray attenuation for different thicknesses of barite concrete qualities of the ISO. The attenuator material issued from different regions of Brazil. The experimental procedure in this research was validated by comparison between the experimental measurements of mass attenuation coefficients and coefficients determined by the same atomic composition, using as a tool to XCOM. The highest value of (mu/p) found experimentally was in the energy of 48 keV, in ISO 60 N quality, being 1.32(+/- 0.49) for purple barite; 1.47(+/- 0.41) for white barite and 1.75(+/- 0.41) for cream barite. The determination of the chemical composition of the barite samples was of fundamental importance for the characterization of these materials. It can be seen that both calculated and measured data for the linear attenuation coefficients increase with the increasing materials density, as it is expected. It can be concluded that the photon attenuation coefficients depends on the photon energy and the materials density is the main contribution to the photon attenuation coefficients, which is important for radiation shielding.
机译：每单位路径长度以特定方式与特定方式相互作用的光子相互作用，通常称为线性衰减系数（MU），并且在辐射屏蔽中具有重要意义。制造具有不同厚度的重晶石混凝土的板，以确定不同能量的质量衰减系数。用ISO X射线束（N60，N80，N110和N150）照射板，由Pantak HF320 X射线设备，在IPEN实验室中产生。使用ISO的不同厚度的X射线衰减来测量重晶石混凝土的质量衰减系数。从巴西不同地区发出的衰减器材料。通过使用与Xcom的工具相同的原子组合物测定的质量衰减系数和系数的实验测量，验证了该研究的实验程序。在实验上发现的（MU / P）的最高值在ISO 60 n质量中为48 keV的能量，为紫色重晶体为1.32（+/- 0.49）; 1.47（+/- 0.41）用于白色晶圆和1.75（+/- 0.41），适用于奶油色调。重晶石样品的化学成分的测定对于这些材料的表征是至关重要的。可以看出，对于线性衰减系数的计算和测量数据均随着预期的增加而增加的材料密度增加。可以得出结论，光子衰减系数取决于光子能量，并且材料密度是光子衰减系数的主要贡献，这对于辐射屏蔽是重要的。

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