文献类型：期刊文献

英文题名：Investigation on fluorescence and thermoluminescence of bismuth silicate crystal doped with Dy

作者：Xiong, Zhengye[1];Xu, Jiayue[2];Zhao, Fuli[3];Zhang, Yan[2];Liu, Jun[1];Tang, Qiang[3]

机构：[1]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Peoples R China;[2]Shanghai Inst Technol, Sch Mat Sci & Engn, Shanghai 201418, Peoples R China;[3]Sun Yat Sen Univ, Sch Phys, Guangzhou 510275, Guangdong, Peoples R China

年份：2017

卷号：192

起止页码：85

外文期刊名：JOURNAL OF LUMINESCENCE

收录：SCI-EXPANDED(收录号：WOS:000413037400013)、、EI(收录号：20172603845779)、Scopus(收录号：2-s2.0-85021123925)、WOS

基金：This research was supported by the Major State Basic Research Development Program of China (973 Program) (2011CB612310), Science and Technology Planning Project of Guangdong Province (2015A020216020) and Educational Commission of Guangdong Province (2014KTSCX074).

语种：英文

外文关键词：Bismuth silicate crystal; Dysprosium; Scintillator; Fluorescence lifetime; Thermoluminescence

外文摘要：Bismuth silicate single crystals doped with rare-earth dysprosium (Dy) were excited by ultra-violet laser pulses with pulse width of 100 ps and wavelength of 266 nm, the lifetime and spectra of the fluorescence were observed. After the samples were irradiated at liquid nitrogen temperature, the thermoluminescence was measured at the rate of 1 K/s. Fluorescence experiments show that the lifetime of the slow decay component is about 100 ns, and the fast decay component is weak; The incorporation of a small amount of Dy can enhance the fluorescent intensity, and so do to the lifetime of slow decay component of the fluorescence; the fluorescence intensity and lifetime decrease while the doping concentration is too large. Low temperature thermoluminescence measurements show that there are thermoluminescence peaks near 176 K and 230 K, and the corresponding energies of thermoluminescence traps are 0.27 eV and 0.36 eV. The presence of these shallow traps may attenuate the fast decay components of the crystal's fluorescence.