Marczewska Barbara, Gieszczyk Wojciech, Kłosowski Mariusz, Książek Marzanna, Bilski Paweł, Boroń Łukasz
Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342 Krakow, Poland.
Department of Non-Ferrous Metals, AGH University of Science and Technology, 30 Mickiewicza Ave., 30-059 Krakow, Poland.
Materials (Basel). 2020 Dec 30;14(1):132. doi: 10.3390/ma14010132.
The purpose of this work was to systematically assess the distribution of thermoluminescence (TL) and optically stimulated luminescence (OSL) properties along the length of crystals grown by the micro-pulling-down method, in relation to the microstructure and distribution of activators. We analyzed lithium magnesium phosphate (LiMgPO; LMP) crystals doped with terbium (Tb; 0.8 mol%) or with a combination of thulium (Tm; 0.8 mol% or 1.2 mol%) and boron (B; 10 mol%). Crystals of several centimeters in length and 3 mm in diameter were cut into 20-40 slices, depending on length. For each sample, TL glow curves and OSL decay curves were examined. Optical microscopy and scanning electron microscopy were used to assess the microstructure and elemental composition of several selected samples. Two-dimensional TL readouts were performed to identify the areas with higher and lower signal emission. Our study showed that there may be significant differences not only in LMP sensitivity along the crystal's axis but also on the surface of the slice. The distribution of activators varies depending on the type of crystals and strongly affects luminescence properties.
这项工作的目的是系统评估通过微下拉法生长的晶体沿长度方向的热释光（TL）和光激发发光（OSL）特性的分布，以及与激活剂的微观结构和分布的关系。我们分析了掺杂铽（Tb；0.8摩尔%）或掺有铥（Tm；0.8摩尔%或1.2摩尔%）和硼（B；10摩尔%）组合的磷酸锂镁（LiMgPO；LMP）晶体。根据长度，将几厘米长、3毫米直径的晶体切成20 - 40片。对每个样品检查TL发光曲线和OSL衰减曲线。使用光学显微镜和扫描电子显微镜评估几个选定样品的微观结构和元素组成。进行二维TL读数以识别信号发射较高和较低的区域。我们的研究表明，不仅沿晶体轴的LMP灵敏度可能存在显著差异，而且切片表面也存在差异。激活剂的分布因晶体类型而异，并强烈影响发光特性。
