Yüksel Mehmet, Dogan Tamer, Portakal Ziyafer Gizem, Topaksu Mustafa
Çukurova University, Arts-Sciences Faculty, Physics Department, 01330, Adana, Turkey.
Çukurova University, Vocational School of Imamoglu, Department of Computer Technologies, 01700, Adana, Turkey.
Appl Radiat Isot. 2019 Jun;148:197-203. doi: 10.1016/j.apradiso.2019.04.005. Epub 2019 Apr 6.
In the present study, the precipitation method was used to synthesize microcrystalline Nd-doped CaSO phosphor. Structural and morphological analysis of the phosphor samples were performed by using X-ray diffraction (XRD) and scanning electron microscopy (SEM) methods. In addition, luminescent properties of the samples were characterized by thermoluminescence (TL) and optically stimulated luminescence (OSL) methods. The results of XRD analysis and SEM images showed that the prepared CaSO:Nd powder samples have an orthorhombic crystal structure and almost spherical in size with an average between 3 and 17 μm. In the light of the luminescence analysis, the optimum preheat temperature required to evacuate the low temperature electron traps was determined as 170 °C. It was also presented that CaSO:Nd samples have the potential to be used as a dosimetric material with a linear dose sensitivity between 1 and 20 Gy (as TL dosimeter), and 1 and 10 Gy (as an OSL dosimeter) when they are exposed to beta irradiation. In addition, the full width at the half maximum (FWHM) values of the main TL peaks presented no independence of HR.
在本研究中，采用沉淀法合成了微晶掺钕硫酸钙荧光粉。通过X射线衍射（XRD）和扫描电子显微镜（SEM）方法对荧光粉样品进行了结构和形态分析。此外，通过热释光（TL）和光激发发光（OSL）方法对样品的发光特性进行了表征。XRD分析结果和SEM图像表明，制备的CaSO:Nd粉末样品具有正交晶体结构，尺寸几乎呈球形，平均粒径在3至17μm之间。根据发光分析，确定排空低温电子陷阱所需的最佳预热温度为170°C。还表明，CaSO:Nd样品有潜力用作剂量测定材料，当它们受到β辐照时，作为TL剂量计的线性剂量灵敏度在1至20Gy之间，作为OSL剂量计的线性剂量灵敏度在1至10Gy之间。此外，主要TL峰的半高宽（FWHM）值与HR无关。
