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Effective atomic numbers for photon energy absorption and energy dependence of some thermoluminescent dosimetric materials

机译:用于某些热致发光剂量材料的光子能量吸收和能量依赖性的有效原子序数

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摘要

Effective atomic number for photon energy absorption (Zpen_(eff)), the relative effective atomic number of the thermoluminescent dosimetric (TLD) materials with respect to air (Zr_(eff)), and energy dependence (ED) of the TLD materials such as beryllium oxide (BeO), lithium tetraborate (Li_2B_4O_7: Cu, Ag, P), aluminum oxide (Al_2O_3), calcium fluoride (CaF_2), and titanium oxide (TiO_2) in the energy range of 1 keV to 20 MeV have been studied. The values of Zpea_(eff) and Zr_(eff) show a broad peak and a maximum value around 20 keV for BeO, around 60 keV for CaF_2 and TiO_2, and around 40 keV for Al_2O_3 and Li_2B_4O_7: Cu, Ag, P. Overall, the effective atomic number (Z_(eff)) varies linearly with ED for all the materials in the photon energy range of 1 keV to 20 MeV except TiO_2 and thereby confirming the validity of a more commonly employed method of using the Z_(eff) to calculate the measure of the ED in TLD. The ED values show a broad peak around 30 keV for CaF_2 and TiO_2 and around 20 keV for Al_2O_3 and remain almost constant for the other two materials.
机译:光子能量吸收的有效原子序数(Zpen_(eff)),热发光剂量(TLD)材料相对于空气的相对有效原子序数(Zr_(eff))以及TLD材料的能量依赖性(ED),例如研究了能量范围为1 keV至20 MeV的氧化铍(BeO),四硼酸锂(Li_2B_4O_7:Cu,Ag,P),氧化铝(Al_2O_3),氟​​化钙(CaF_2)和氧化钛(TiO_2)。 Zpea_(eff)和Zr_(eff)的值显示出一个宽的峰值,BeO的最大值约为20keV,CaF_2和TiO_2的最大值约为60keV,Al_2O_3和Li_2B_4O_7的最大值约为40keV:Cu,Ag,P。 ,有效原子序数(Z_(eff))对于除TiO_2以外的1 keV至20 MeV的光子能量范围内的所有材料,其有效原子数随ED线性变化,从而证实了使用Z_(eff)的更常用方法的有效性计算TLD中ED的度量。 ED值显示CaF_2和TiO_2大约30 keV,Al_2O_3大约20 keV的宽峰,对于其他两种材料几乎保持恒定。

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