Luminescence of BaCl₂:Eu²⁺ particles dispersed in the NaCl host excited by synchrotron radiation

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• 作者：A.S. Pushak^a ; ^{apushak@gmail.com} ; P.V. Savchyn^b ; V.V. Vistovskyy^b ; T.M. Demkiv^b ; J.R. Dacyuk^b ; S.V. Myagkota^c ; A.S. Voloshinovskii^b
• 关键词：Divalent europium ; Luminescence ; Decay kinetics ; BaCl2 ; Eu
• 刊名：Journal of Luminescence
• 出版年：2013
• 出版时间：March, 2013
• 年：2013
• 卷：135
• 期：Complete
• 页码：1-4
• 全文大小：481 K

文摘

BaCl₂:Eu²⁺ microcrystals embedded in the NaCl host have been obtained in the NaCl-BaCl₂(1 mol % )-EuCl₃(0.02 mol % ) crystalline system. The influence of the annealing conditions on the formation of such particles has been studied. In particular, long-term annealing (at 200 ¡ã§³ during 100 h) promotes the microcrystals formation in the NaCl-BaCl₂-Eu crystalline system. The subsequent heat treatment (annealed at 600 ¡ã§³ during 72 h and quenched to room temperature) is shown to lead to the destruction of the majority of these particles. The luminescent-kinetic properties of BaCl₂:Eu²⁺ microcrystals have been studied upon the ultra-violet excitation by the synchrotron radiation. The X-ray excited luminescence has been measured in order to estimate the distribution of europium ions between microcrystals and the NaCl host. The excitation mechanisms of Eu²⁺ ions in the NaCl-BaCl₂-Eu crystalline system are discussed.