Optical and scintillation properties of Nd-doped SrAl2O4 crystals 被引量：1

Optical and scintillation properties of Nd-doped SrAl_2O_4 crystals

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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 ℃. 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 ℃.

作者 Daisuke Nakauchi Go Okada Masanori Koshimizu Takayuki Yanagida

机构地区 Graduate School of Materials Science.Nara Institute of Science and Technology(NAIST) Department of Applied Chemistry

出处《Journal of Rare Earths》 SCIE EI CAS CSCD 2016年第8期757-762,共6页 稀土学报（英文版）

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

关键词 scintillation PHOTOLUMINESCENCE storage luminescence single crystal rare earths scintillation photoluminescence storage luminescence single crystal rare earths

分类号 O614.232 [理学—无机化学]

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