Luminescence excitation spectra of wide bandgap oxide crystals were measured in the soft X-ray range of excitation (300-750 eV) at the BEAR beamline of the electron storage ring Elettra (Trieste). We give a special attention to changes of the light yield in the vicinity of the absorption K-edge of oxygen. The excitation spectra of two well-known scintillators YAG-Yb and LuAP-Ce (chemical formulae are Y 3Al 5O 12:Yb (15%) and LuAlO 5:Ce (0.4%)) reveal a non-proportional change of the quantum yield and a different response to the jump of absorption coefficient at the 1 sO edge for certain emission bands. The analysis of experimental data shows that both the surface loss and interaction effects between secondary electronic excitations (EEs) can influence the energy conversion process in crystals.
Soft X-ray excitation of luminescence in wide bandgap crystals doped with rare-earth ions / E., Meltchakov; B., Vidal; I., Kamenskikh; A. N., Vasil'Ev; A., Belsky; C., Dujardin; Nannarone, Stefano; M., Pedio; A., Giglia; N., Mahne; M., Coreno; M., de Simone; M., Danailov. - In: PHYSICA STATUS SOLIDI. C, CURRENT TOPICS IN SOLID STATE PHYSICS. - ISSN 1862-6351. - STAMPA. - 4:(2007), pp. 1092-1095. [10.1002/pssc.200673811]
Soft X-ray excitation of luminescence in wide bandgap crystals doped with rare-earth ions
NANNARONE, Stefano;
2007
Abstract
Luminescence excitation spectra of wide bandgap oxide crystals were measured in the soft X-ray range of excitation (300-750 eV) at the BEAR beamline of the electron storage ring Elettra (Trieste). We give a special attention to changes of the light yield in the vicinity of the absorption K-edge of oxygen. The excitation spectra of two well-known scintillators YAG-Yb and LuAP-Ce (chemical formulae are Y 3Al 5O 12:Yb (15%) and LuAlO 5:Ce (0.4%)) reveal a non-proportional change of the quantum yield and a different response to the jump of absorption coefficient at the 1 sO edge for certain emission bands. The analysis of experimental data shows that both the surface loss and interaction effects between secondary electronic excitations (EEs) can influence the energy conversion process in crystals.
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
