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Thermoluminescence responses of photon- and electron-irradiated lithium potassium borate co-doped with Cu+Mg or Ti+Mg

机译:Cu + Mg或Ti + Mg共掺杂的光子和电子辐照硼酸锂钾的热致发光响应

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摘要

New glasses Li2CO3-K2CO3-H3BO3 (LKB) co-doped with CuO and MgO, or with TiO2 and MgO, were synthesized by the chemical quenching technique. The thermoluminescence (TL) responses of LKB:Cu,Mg and LKB:Ti,Mg irradiated with 6MV photons or 6MeV electrons were compared in the dose range 0.5-4.0Gy. The standard commercial dosimeter LiF:Mg,Ti (TLD-100) was used to calibrate the TL reader and as a reference in comparison of the TL properties of the new materials. The dependence of the responses of the new materials on 60Co dose is linear in the range of 1-1000Gy. The TL yields of both of the co-doped glasses and TLD-100 are greater for electron irradiation than for photon irradiation. The TL sensitivity of LKB:Ti,Mg is 1.3 times higher than the sensitivity of LKB:Cu,Mg and 12 times less than the sensitivity of TLD-100. The new TL dosimetric materials have low effective atomic numbers, good linearity of the dose responses, excellent signal reproducibility, and a simple glow curve structure. This combination of properties makes them suitable for radiation dosimetry.
机译:通过化学淬火技术合成了新的掺有CuO和MgO或TiO2和MgO的Li2CO3-K2CO3-H3BO3(LKB)玻璃。在剂量范围0.5-4.0Gy中比较了用6MV光子或6MeV电子辐照的LKB:Cu,Mg和LKB:Ti,Mg的热致发光(TL)反应。标准的商用剂量计LiF:Mg,Ti(TLD-100)用于校准TL读数器,并作为比较新材料的TL特性的参考。新材料的响应对60Co剂量的依赖性在1-1000Gy范围内呈线性关系。电子照射的共掺杂玻璃和TLD-100的TL产率均高于光子照射的TL产率。 LKB:Ti,Mg的TL敏感性比LKB:Cu,Mg的敏感性高1.3倍,比TLD-100的敏感性低12倍。新型TL剂量材料具有低有效原子序数,良好的剂量响应线性,出色的信号重现性以及简单的辉光曲线结构。这些特性的组合使它们适用于辐射剂量测定。

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