摘要
闪烁体具有吸收高能光子并将其转换成低能可见光子的能力,被广泛应用于无损检测、安全检查和医学成像等领域。针对传统闪烁晶体制备过程耗时长且成本高的缺点,采用传统熔融淬冷法合成了Sn^(2+)掺杂的透明硼硅酸盐玻璃,并系统研究了该材料的透射光谱、激发光谱、紫外(UV)受激发射光谱、X射线激发发光(XEL)光谱以及衰减曲线。实验结果表明,适当的热处理能有效增强样品的UV激发和XEL强度,最佳样品的XEL强度为商用Bi_(4)Ge_(3)O_(12)晶体的25.1%。此外,在不同功率X射线辐照下样品的透过率仅略有下降,且再次经过热处理可恢复为初始水平。制备的样品具有优异的紫外激发和X射线辐照荧光特性,在X射线成像等领域具有潜在的应用前景。
Scintillators that can absorb high-energy photons and convert them into low-energy visible photons are used extensively in fields,including nondestructive inspection,security inspection,and medical imaging.Aiming at the inadequacy of time-consuming and high cost in the preparation process of traditional scintillator crystals,Sn^(2+)-doped borosilicate glasses are synthesized successfully through the traditional melt-quenching approach in this study.The transmission,excitation,and ultraviolet(UV)stimulated emission spectra,X-ray excited luminescence(XEL)spectra,and decay curves of the materials are systematically investigated.The experimental findings that correct heat treatment can efficiently improve the fluorescence intensity of UV and XEL of the sample,and the XEL intensity of the optimal sample reaches 25.1%of that of commercial Bi_(4)Ge_(3)O_(12) crystal.Furthermore,the transmittance of the sample decreases only moderately under various power X-ray excitation.In addition,it can be restored to the initial level after the thermal treatment again.The synthesized samples endow remarkable fluorescence properties of ultraviolet excitation and X-ray irradiation that have promising potential in X-ray imaging and other fields.
作者
魏荣妃
汪丽
陆福民
胡芳芳
郭海
Wei Rongfei;Wang Li;Lu Fumin;Hu Fangfang;Guo Hai(Department of Physics,Zhejiang Normal University,Jinhua 321004,Zhejiang,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第15期77-82,共6页
Laser & Optoelectronics Progress
基金
国家自然科学基金(51802285,11974315,11804303,51902178)、浙江省自然科学基金(LQ22A040011,LQ18A040004,LZ20E020002)。
关键词
材料
玻璃
闪烁体
荧光
X射线
materials
glass
scintillator
luminescence
X-ray
