Zahedifar M, Sadeghi E, Kashefi Biroon M, Harooni S, Almasifard F
Physics Department, University of Kashan, Kashan, Islamic Republic of Iran; Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Islamic Republic of Iran.
Physics Department, University of Kashan, Kashan, Islamic Republic of Iran; Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Islamic Republic of Iran.
Appl Radiat Isot. 2015 Nov;105:176-181. doi: 10.1016/j.apradiso.2015.08.022. Epub 2015 Aug 19.
Dy and Cu-doped SrF2 nanoparticles (NPs) were synthesized by using co-precipitation method and their possible application to solid state dosimetry were studied and compared to that of pure SrF2 NPs. X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) were used for sample characterization. The highest thermoluminescence (TL) response of SrF2:Dy and SrF2:Cu NPs were found respectively at 0.5 and 0.7mol% of Dy and Cu impurities. Seven overlapping glow peaks at 384, 406, 421, 449, 569, 495, 508K and three component glow peaks at 381, 421 and 467K were identified respectively for SrF2:Dy and SrF2:Cu NPs employing Tm-Tstop and computerized glow curve deconvolution (CGCD) methods. The TL sensitivity of SrF2:Dy is approximately the same as that of LiF:Mg,Ti (TLD-100) cheeps. Linear dose response were observed for the SrF2:Dy and SrF2:Cu NPs up to the absorbed doses of 1kGy and 10kGy correspondingly. Regarding other dosimetry characteristics of the produced NPs such as fading, reproducibility and thermal treatment, Dy and Cu doped SrF2 NPs recommend for high dose TL dosimetry applications.
采用共沉淀法合成了掺杂镝（Dy）和铜（Cu）的氟化锶（SrF₂）纳米颗粒（NPs），研究了它们在固态剂量测定中的可能应用，并与纯SrF₂ NPs进行了比较。使用X射线衍射（XRD）、扫描电子显微镜（SEM）和能量色散光谱仪（EDS）对样品进行表征。发现Dy和Cu杂质含量分别为0.5mol%和0.7mol%时，SrF₂:Dy和SrF₂:Cu NPs的热释光（TL）响应最高。采用Tm-Tstop和计算机化热释光曲线解卷积（CGCD）方法，分别为SrF₂:Dy和SrF₂:Cu NPs识别出384、406、421、449、569、495、508K处的七个重叠发光峰和381、421和467K处的三个复合发光峰。SrF₂:Dy的TL灵敏度与氟化锂镁钛（LiF:Mg,Ti，TLD-100）芯片的灵敏度大致相同。SrF₂:Dy和SrF₂:Cu NPs在吸收剂量分别达到1kGy和10kGy时观察到线性剂量响应。关于所制备NPs的其他剂量测定特性，如衰退、重现性和热处理，掺杂Dy和Cu的SrF₂ NPs推荐用于高剂量TL剂量测定应用。
