Gupta Karan Kumar, Dhoble S J, Krupski Aleksander R
Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan, ROC.
Department of Physics, RTM Nagpur University, Nagpur, 440033, India.
Sci Rep. 2020 Dec 3;10(1):21203. doi: 10.1038/s41598-020-78365-4.
Dy doped β-CaPO phosphor has been synthesized using wet chemical method. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis confirmed the formation of β-CaPO:Dy nano-phosphors. However, photoluminescence (PL) study was carried out to confirm the presence of dopant ion in the host matrix of β-CaPO:Dy material. Thermoluminescence (TL) glow curves of β-CaPO were recorded for different concentrations of Dy after exposure to various fluences of C ion beam (75 meV). TL sensitivity of β-CaPO:Dy (0.1 mol%) phosphor was 3.79 times more than commercially available CaSO:Dy. TRIM code based on the Monte Carlo simulation was used to calculate the absorbed doses, ion range and main energy loss. Glow curve de-convolution (GCD) method was used to determine the number of TL peaks and their trapping parameters. The wide linear response of β-CaPO nanoparticles along with high stability of TL glow curve makes this nanomaterial a good candidate for C ion beam dosimetry.
采用湿化学法合成了Dy掺杂的β-CaPO荧光粉。扫描电子显微镜（SEM）和透射电子显微镜（TEM）分析证实了β-CaPO:Dy纳米荧光粉的形成。然而，进行了光致发光（PL）研究以确认Dy掺杂离子在β-CaPO:Dy材料主体基质中的存在。在暴露于不同注量的C离子束（75 meV）后，记录了不同Dy浓度下β-CaPO的热释光（TL）发光曲线。β-CaPO:Dy（0.1 mol%）荧光粉的TL灵敏度比市售CaSO:Dy高3.79倍。基于蒙特卡罗模拟的TRIM代码用于计算吸收剂量、离子射程和主要能量损失。采用发光曲线解卷积（GCD）方法确定TL峰的数量及其俘获参数。β-CaPO纳米颗粒的宽线性响应以及TL发光曲线的高稳定性使得这种纳米材料成为C离子束剂量测定的良好候选材料。
