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Crystal Growths and Physical Properties of Super-High Energy Sinchillator CeF_3 System Doped with Rare Earths

稀土掺杂超高能辛奇勒CeF_3体系的晶体生长及物理性质

基本信息

批准号：
08458120
负责人：
KAWANO Katsuyasu
金额：
$ 0.7万
依托单位：
The University of Electro-Communications
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

This research project aims to grow super-high energy sinchillator CeF_3 system doped with rare earths and to investigate fundamentally physical properties of them. The CeF_3 is one of the most promising sinchillators in recent years. We prepared various probable inorganic crystals ; mixed crystals, rare earth doped crystals about CeF_3 and other related sinchillators. In first year, we purchased newly SIT (Electro-Static Induction Transister)-inverter for efficiently induction heating, and succeeded the growth of a very high-quality CsI and CsI : Eu crystals that was a measure of high-energy sinchillator crystal growth. In second year, we established measurement systems of optical detection of magnetic resonance, in which we purchased necessary magnetic resonance cavity attached with optical window and hand-made other optical and magnetic accessories. Irradiation testings were carried out for CeF_3, CsI,CsI : Eu, SrF_2 BaF_2 and their mixed crystals under gamma-ray of 10^6 to 10^8 rad in absorbed dose by ^<60>Co ray source in Tokyo Metropolitan Industrial Techniques Center where is located near our University. Anti-radiation abilities and identifications of generated color centers were investigated by optical and opt-magnetical procedures. For publication, we presented papers ; "Radiative to Non-radiative Processes for Luminescence of Eu^<2+> ion in SrF_2-BaF_2 Mixed Crystals", "lattice Mismatchings in SrF_2-BaF_2 Mixed Crystal Systems Monitored by Eu^<2+> Dopants", "Space Charge Relaxation and Clustering in Yttrium Doped BaF_2" and other related conference papers. A paper about luminescence spectra by X-ray excitation investigated on the Eu^<2+> ion doped into the fluorite-type Ca_<1-x>Sr_xF_2 and Sr_<1-x>Ba_xF_2 mixed crystal systems is submitted by a journal. We pulished also a few papers about high-conversion solar cells for applications of inorganic crystals doped with rare earths.

本研究项目旨在生长稀土掺杂的超高能晶体CeF_3系统，并对其物理性能进行初步的研究。CeF_3是近年来最有发展前景的正弦激冷器之一。我们制备了各种可能的无机晶体：混合晶体、稀土掺杂CeF_3晶体和其他相关晶体。在第一年，我们购买了新的SIT(静电感应换能器)逆变器用于高效感应加热，并成功地生长了非常高质量的CSI和CSI：Eu晶体，这是衡量高能正弦激励器晶体生长的指标。第二年，我们建立了磁共振光学检测测量系统，购买了必要的带有光学窗口的磁共振谐振腔和手工制作的其他光学和磁性配件。利用东京都工业技术中心的60&GT；Co射线源，对CeF_3、CsI、CsI：Eu、SRF_2BaF_2及其混晶进行了10.6~10.8拉德吸收剂量的伽马射线辐照试验。用光学和光磁方法研究了产生的色心的识别和抗辐射能力。发表的论文有：《SrF_2-BaF_2混晶中Eu~(2+)~(2+)&Gt~(2+)离子的辐射发光到非辐射发光过程》、《掺Eu~(2+)和BaF_2~(2+)掺杂的SrF_2-BaF_2混晶体系中的晶格失配》、《掺Y BaF_2中的空间电荷驰豫和团簇》等相关学术论文。一篇关于掺Eu~(2+)&lt；1-x&gt；sr_xF_2和sr_&lt；1-x&gt；BaxF_2混晶体系中Eu~(2+)和Lt~(2+)的X射线激发发光光谱研究的论文发表在一份期刊上。我们还发表了一些关于稀土掺杂无机晶体应用的高转换太阳能电池的论文。