Effect of B2O3 on luminescence and scintillation properties of gadolinium aluminium–silicate glass
Effect of B2O3 on luminescence and scintillation properties of gadolinium aluminium–silicate glass
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DOI：
10.1016/j.ceramint.2023.03.006
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发表时间：
2023-03
影响因子：
5.2
通讯作者：
Z. Hua;Gao Tang;Lirong Zheng;Tao Wu;Huiyun Ban;Hua Cai;Jifeng Han;Hui Liu;Sen Qian;L. Qin;Qinhua Wei;Shan Liu;Jing Ren;Xinyuan Sun;Yao Zhu
中科院分区：
文献类型：
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作者：
Z. Hua;Gao Tang;Lirong Zheng;Tao Wu;Huiyun Ban;Hua Cai;Jifeng Han;Hui Liu;Sen Qian;L. Qin;Qinhua Wei;Shan Liu;Jing Ren;Xinyuan Sun;Yao Zhu
在Ce ~（3+）掺杂的Gd_2O_3-Al_2O_3-SiO_2（xBGAS：1.1Ce_3+，x = 0，5，10，15）玻璃中加入不同含量的B_2O_3，以改善玻璃的光致发光（PL）和闪烁性能。15 BGAS：1.1Ce ~（3+）玻璃的透过率大于80%。X射线近边吸收谱（XANES）表明，Si 3 N4的加入可以有效地将玻璃中的Ce 4+还原为Ce 3+。随着B_2O_3含量的增加，激发光谱和发射光谱均发生蓝移。光致发光量子产率（PL QY）随B2 O3含量的增加而增加，当x = 15时达到最大值59.55%。由于Ce ~（3+）离子的5d→4f跃迁，玻璃的PL衰减时间呈现典型值（44-50 ns）。发光热激活能变大，表明xBGAS：1.1Ce3+玻璃具有较好的发光热稳定性。15 BGAS：1.1Ce3+玻璃的X射线激发发光（XEL）积分强度为Bi 4Ge 3 O 12（BGO）晶体的37.38%，在662 keV的γ射线照射下，光产额为1267 ph/MeV，能量分辨率为23.22%。随着B2 O3含量的增加，闪烁衰减时间的快成分逐渐变短，慢成分逐渐变长。测量了xBGAS：1.1Ce ~（3+）玻璃的热释光（TSL）曲线，研究了xBGAS：1.1Ce ~（3+）玻璃中缺陷的陷阱深度和密度。
Different B2O3content was added to Ce3+–doped Gd2O3–Al2O3–SiO2(xBGAS:1.1Ce3+, x = 0, 5, 10, 15) glasses to improve the photoluminescence (PL) and scintillation properties. The transmittance of 15BGAS:1.1Ce3+glass is over 80%. The X–ray absorption near edge spectroscopy (XANES) spectra imply that Ce4+can be effectively reduced to Ce3+in the glasses by adding Si3N4. The excitation and emission spectra show a blue shift with increase of B2O3content. The photoluminescence quantum yield (PL QY) increases with the increase of B2O3content, reached the maximum of 59.55% when x = 15. The PL decay time of the glasses exhibits typical values (44–50 ns) due to 5d→4f transition of Ce3+ions. The PL thermal activation energy become larger, indicating that xBGAS:1.1Ce3+glasses have better luminescent thermal stability. The integral X–ray excited luminescence (XEL) intensity of the 15BGAS:1.1Ce3+glass is 37.38% of Bi4Ge3O12(BGO) crystal, and the light yield is 1267 ph/MeV with an energy resolution of 23.22% at 662 keV when exposed to γ–rays. With the increase of B2O3content, the fast component of scintillation decay time gradually becomes shorter and the slow component becomes longer. The thermally stimulated luminescence (TSL) curves were measured to investigate the trap depth and density of defects in xBGAS:1.1Ce3+glasses.