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Inne
VUV spectroscopy of double phosphates doped with rare earth ions.
Autorzy
Rok wydania
2009
Czasopismo
Numer woluminu
31
Strony
567-574
DOI
10.1016/j.optmat.2007.11.035
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Structure and optical properties of Eu3+ and Gd3+ in sodium double phosphates were studied. Emission spectra were measured under VUV/UV excitation at room and low temperatures. Structural differences in various kinds of sodium double phosphate matrices are manifested in their optical behaviors. Under synchrotron radiation, Na3Gd(PO4)2 exhibits the ultraviolet 6PJ → 8S7/2 and red from the 6GJ level emissions. In the case of europium and gadolinium systems, the Gd3+ → Eu3+ energy transfer process was observed and investigated. Absence of emission from the 5DJ and 6IJ levels of the Gd3+ ion and from higher 5DJ states of Eu3+ ion was attributed to the effective multiphonon relaxation which involves only two high-energy phonons of the phosphate group in this lattice.
Słowa kluczowe
Eu3+ ions, Gd3+ ions, double phosphate, cascade emission, energy transfer
Adres publiczny
https://doi.org/10.1016/j.optmat.2007.11.035
Strona internetowa wydawcy
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