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LuAP/LuYAP single crystals for PET scanners: effects of composition and growth history

机译:用于PET扫描仪的LuAP / LuYAP单晶:成分和生长历史的影响

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In this paper we present results of optical and scintillation studies of three series of LuAP and LuYAP crystals differing in yttrium and cerium concentrations. Comparison of as-grown and UV-irradiated crystals has revealed two types of color centers located at 200-240 nm and 250-320 nm and giving rise to underlying absorption. The percentage of light emitted at 1 us increases from 76% in LuYAP (Lu80%) to 85% in LuAP but is dependent on Ce concentration too. The light output for the best LuYAP and LuAP specimens of 2 x 2 x 10 mm~3 measured in the vertical geometry was 50% of LSO and 35% of LSO respectively.
机译:在本文中,我们介绍了三种钇和铈浓度不同的LuAP和LuYAP晶体的光学和闪烁研究结果。比较生长中的晶体和紫外线照射后的晶体,发现两种类型的色心位于200-240 nm和250-320 nm处,并引起潜在的吸收。 1 us时发出的光的百分比从LuYAP中的76%(Lu80%)增加到LuAP中的85%,但也取决于Ce的浓度。在垂直几何形状中测得的最佳LuYAP和LuAP标本2 x 2 x 10 mm〜3的光输出分别为LSO的50%和LSO的35%。

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