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SM ISO690:2012 UNTILA, Dumitru, RACOVEŢ, Oxana, EVTODIEV, Silvia, CARAMAN, Mihail. Absorbtia luminii si fotoluminescenta ionilor eu3+ in cristale de caf2. In: Studia Universitatis Moldaviae (Seria Ştiinţe Exacte şi Economice), 2012, nr. 2(52), pp. 65-69. ISSN 1857-2073. |
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Studia Universitatis Moldaviae (Seria Ştiinţe Exacte şi Economice) | ||||||
Numărul 2(52) / 2012 / ISSN 1857-2073 /ISSNe 2345-1033 | ||||||
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Pag. 65-69 | ||||||
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From optical transmittance and photoluminescence measurements of natural crystals of CaF2:Eu was established
the correlation between energy states diagram of Eu3 ion and the structure of these bands. Photon absorption in this
material occurs at electronic transitions from the 7F0 level on the G, D, L configuration levels of Eu3 ion. Because 7F1
level population is much smaller than the 7F0 fundamental level population, the photon absorption intensity which
involving 7F1 level is not evident in absorption spectra at room temperature. CaF2:Eu3 crystal photoluminescence is
determined by electron radiative transitions from 5D0 level to the low energy levels 7F0, 7F2 and, perhaps, 7F3. |
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