Luminescence properties of Gd2Si2O7：Ce and Gd2Si2O7：La,Ce under vacuum ultraviolet irradiation

作     者：M.Koshimizu T.Yanagida Y.Fujimoto K.Asai 无

作者机构：Department of Applied Chemistry Graduate School of Engineering Tohoku University 6-6-07 Aoba Aramaof Aoba-ku Sendai 980-8579 Japan Graduate School of Materials Science Nara Institute of Science and Technology 8916-5 Takayama-Cho Ikoma Nara 630-0192 Japan 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2016年第34卷第8期

页      面：782-785页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 0708[理学-地球物理学] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：supported by the Joint Studies Program (2014, No. 26–546) of the Institute for Molecular Science supported by the SPRITS program, Kyoto University the Cooperative Research Project of Research Institute of Electronics, Shizuoka University 

主　　题：energy transfer scintillation vacuum ultraviolet rare earths 

摘      要：The luminescence properties of Ce- or Ce and La-doped gadolinium pyrosilicate （Gd2Si2OT, GPS） were characterized using vacuum ultraviolet （VUV） excitation light. A prominent emission band was observed in the luminescence spectra with excitation at 60 nm and ascribed to 5d-4f transition of Ce3＋. Because the excitation wavelength of 60 nm corresponded to the excitation in the host matrix, this result indicated that the excitation energy transfer occurred from the host matrix to Ce3＋ ions. On the basis of the rise in the luminescence time profiles with excitation at 60 nm, the energy transfer occurred within 2 ns, which was much shorter than that of Ce-doped Gd2SiO2. For Ce-doped GPS, the decay rate was slower for the host excitation than that for direct excitation of Ce3＋. In contrast, for Ce and La-doped GPS, no significant difference was observed for the host excitation and direct excitation of Ce3＋. This result indicated that the energy transfer from the host to Ce3＋ ions led to a different radiative decay process, and that La doping had an effect on the energy transfer and decay process.