Optical and scintillation properties of Nd-doped SrAl2O4 crystals

作     者：Daisuke Nakauchi Go Okada Masanori Koshimizu Takayuki Yanagida 无

作者机构：Graduate School of Materials Science.Nara Institute of Science and Technology(NAIST)8916-5 Takayama-cholkoma-shiNara 630-0192Japan Department of Applied ChemistryGraduate School of EngineeringTohoku University 6-6-07 AobaAramakiAoba-ku.Sendai 980-8579.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：757-762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：Project supported by the Aid for Scientific Research((A)-26249147)from the Ministry of Education,Culture,Sports,Science and Technology of the Japanese government(MEXT) JST A-step,Green Photonics Research from MEXT the Adaptable and Seamless Technology Transfer Program(A-STEP)by the Japan Science and Technology(JST)Agency the Murata Science Foundation a cooperative research project of the Research Institute of Electronics,Shizuoka University 

主　　题：scintillation photoluminescence storage luminescence single crystal rare earths 

摘      要：Nd-doped SrA1204 （Nd：SrA1204） crystals were prepared by a floating zone （FZ） method with different dopant concentra- tions. The photoluminescence （PL） measurements under visible light excitations confirmed strong near infrared （NIR） emissions around 890 nm, which is due to the 4f-4f transitions of Nd3＋, and the decay time constants were 300-400 μs. Furthermore, VUV ex- citations revealed two broad emissions around 250450 and 500-700 run, which were attributed to self-trapped excitons （STEs） perturbed by Nd3＋. Moreover, the X-ray induced scintillation spectra showed some small peaks at around 380 nm in addition to NIR emissions at 1064 nm similarly seen in PL. The former scintillation decay time constants were 30-40 Its. In the undoped sample, these emissions mentioned above were not present but a weak broad emission around 450 nm appeared. In thermally stimulated lu- minescence （TSL） after X-ray irradiation, strong TSL glow peaks were observed in the Nd-doped samples at around 100 and 250 ℃.