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Thermoluminescence of Ce and Nd co-doped CaF2 phosphors after beta irradiation
Journal of Luminescence ( IF 3.6 ) Pub Date : 2021-02-05 , DOI: 10.1016/j.jlumin.2021.117949
H. Yazan , Z.G. Portakal-Uçar , S. Akça , M. Topaksu , P.D. Townsend , N. Can

In this study, we have synthesized CaF2:Nd3+,Ce3+ phosphors by solid state reaction method. The thermoluminescence (TL) properties of the family of synthesized phosphors (CaF2:Ce3+ and CaF2:Ce3+,Nd3+) were investigated using a combination of a SCHOTT BG39 and HC414/46 filters. This gave the highest TL intensity of each phosphor after 10 Gy β-irradiation. Two TL glow peaks of CaF2:Nd3+,Ce3+ phosphor are centered at around 90 and 265 °C (with a heating rate of 2 °Cs−1). The glow peaks displayed a linear dose response in the range of 0.1–50 Gy. Various heating rates (VHR) were performed between 0.5 and 10 °Cs−1. It was seen that the TL intensity at 90 °C decreases and peak maximum temperature shifts to higher temperatures with an increasing heating rate. The TL intensity of the glow peak located at 265 °C increases with heating rate. The initial rise (IR) applied after TMTstop experiment and computerized glow curve deconvolution (CGCD) methods in addition to the VHR method on the glow curves of CaF2:Nd3+,Ce3+ phosphor were used to determine the number of peaks, the order of kinetics (b), activation energy (E) and frequency factor (s). The response of TL glow curves remained constant within ±2% deviation from the initial value after 10 cycles of reuse.



中文翻译:

β辐射后Ce和Nd共掺杂CaF 2荧光粉的热致发光

在本研究中,我们通过固相反应法合成了CaF 2:Nd 3+,Ce 3+荧光粉。使用SCHOTT BG39和HC414 / 46滤光片的组合,研究了合成荧光粉家族(CaF 2:Ce 3+和CaF 2:Ce 3+,Nd 3+)的热致发光(TL)特性。在10 Gyβ辐照后,每种荧光粉的TL强度最高。CaF 2:Nd 3+,Ce 3+荧光粉的两个TL辉光峰集中在90和265°C(加热速率为2°C s -1)。辉光峰显示0.1–50 Gy范围内的线性剂量响应。在0.5至10°Cs -1之间执行各种加热速率(VHR)。可以看出,随着加热速率的增加,在90°C时的TL强度降低,并且最大峰值温度移至更高的温度。265°C时辉光峰的TL强度随加热速率而增加。初始上升(IR)之后施加Ť中号- Ť停止实验和计算机化辉光曲线去卷积除了上的CaF的辉光曲线的VHR方法(CGCD)方法2:钕3+,Ce的3+荧光粉用于确定峰数,动力学顺序(b),活化能(E)和频率因子(s)。在重复使用10个循环后,TL辉光曲线的响应与初始值的偏差保持在恒定值的±2%以内。

更新日期:2021-02-09
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