Energy transfer features in extbox>Eu²⁺extbox> and extbox>Ce³⁺extbox> doped extbox>LiCaAlF₆extbox> crystals

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• 作者：S. Neicheva ; A. Gektin ; N. Shiran ; K. Shimamura ; E. Villora
• 关键词：e="mml25">e="text-decoration ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml25&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=61ac783d65e8599cedc3da1c418a40b5" title
• 刊名：Radiation Measurements
• 出版年：2007
• 期刊代码：71_13504487
• 类别：ce
• 出版时间：April-May 2007
• 卷：42
• 期：4-5
• 页码：811-814
• 文件大小：198 K

摘要

Energy transfer in e="mml14">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml14&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=5e1692f75ba9854f69e1f0b4d880461c" title="Click to view the MathML source">Eu²⁺ or e="mml15">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml15&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=6e8245fc46759d085766c8e4eb7046b3" title="Click to view the MathML source">Ce³⁺ doped e="mml16">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml16&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=457094966d5247b62fd5785eb0aff88c" title="Click to view the MathML source">LiCaAlF₆ crystals was investigated. Both ions occupy e="mml17">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml17&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=7bec57587f50dd71dc4f1862b53da337" title="Click to view the MathML source">Ca²⁺ sites in a colquiriite lattice. e="mml18">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml18&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=048054e4ea65cef1c1f6f3dc31c6aefb" title="Click to view the MathML source">Eu²⁺ ion does not require any compensation while the surplus charge of e="mml19">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml19&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=e7540b4be0383986ecb836528a9f0a9d" title="Click to view the MathML source">Ce³⁺ ion is compensated by point defects. The different RE centre structure and environment modify properties of doped crystals. It is shown that the energy transfer in doped e="mml20">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml20&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=6732ca869445f52ed23079bcdc566a93" title="Click to view the MathML source">LiCaAlF₆ is determined by the RE charge, volume and/or local disposition of charge compensative defects and redox reaction typical for e="mml21">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml21&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=ec99e0c5c9bcd7ed6a1a7b57c6810d22" title="Click to view the MathML source">RE³⁺. The light yield deterioration in Ce-containing crystals under radiation is caused by the decrease in the emission centre concentration due to the redox conversions of e="mml22">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml22&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=14df2e82add23da5ce12cb0b9aebdc19" title="Click to view the MathML source">Ce³⁺ ions. The luminescence re-absorption by the colour centres is an extra channel of scintillation efficiency losses. The energy storage in e="mml23">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml23&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=3a6b567f13df8f849351d2b215679381" title="Click to view the MathML source">LiCaAlF₆:Ce depends on the e="mml24">e="text-decoration:none; color:black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6TVS-4N3GFS4-25&_mathId=mml24&_user=10&_cdi=5542&_rdoc=75&_acct=C000050221&_version=1&_userid=10&md5=76309146aecb2c64b5ffbea851e4c0bd" title="Click to view the MathML source">Ce³⁺ ion and compensative defects dislocated in the crystal volume.