期刊名称：Studia Universitatis Moldaviae: Stiinte Sociale
印刷版ISSN：1814-3199
电子版ISSN：2345-1017
出版年度：2012
卷号：2
期号：52
页码：65-69
出版社：Moldova State University
摘要：From optical transmittance and photoluminescence measurements of natural crystals of CaF2:Eu was establishedthe correlation between energy states diagram of Eu3+ ion and the structure of these bands. Photon absorption in thismaterial occurs at electronic transitions from the 7F0 level on the G, D, L configuration levels of Eu3+ ion. Because 7F1level population is much smaller than the 7F0 fundamental level population, the photon absorption intensity whichinvolving 7F1 level is not evident in absorption spectra at room temperature. CaF2:Eu3+ crystal photoluminescence isdetermined by electron radiative transitions from 5D0 level to the low energy levels 7F0, 7F2 and, perhaps, 7F3
