Luminescence of F + and F centers in YAlO3

Peculiarities of luminescence and scintillation properties of YAP:Ce and LuAP:Ce single crystals and single crystalline films

“…This points to the considerably lower concentrations of these centers in SCF in comparison with YAP:Ce and LuYAP:Ce SC. Due to correlation between the spectral positions of these bands and excitation bands of F + and F centers emission in the exciton region in YAP SC (Zorenko et al, 2004b;2005a), the nature of this bands more likely corresponds to the transitions from the oxygen-based levels of the upper part of valence band (VB) perturbed by the Ce 3+ ions and levels of the VD-related centers with one or two trapped electrons (e). After localization of the hole (h) coming from the VB at the Ce 3+ ion the formation of closely located Ce 3+ (h)-VD (e or 2e) pair centers takes place .…”

Crystal growth and scintillating properties of (Pr,Si)‐doped YAlO3

“…Absorption of Si (0.1 mol%)-codoped sample shows this induced absorption at 400 nm only after annealing in air at 1170°C for 12 hours and becomes thus similar to the Si (0.02 mol%)-codoped crystals. The nature of the 400 nm absorption in Si-codoped samples can be ) rather than to oxygen vacancy-related electron traps like F + [12][13][14]. On the other hand, positive effect of moderate level Si-codoping on the radiation induced absorption was discussed in [10].…”

“…On the other hand, positive effect of moderate level Si-codoping on the radiation induced absorption was discussed in [10]. Generally, in Pr-doped YAP the induced absorption bands from charge transfer absorption transition of Pr 4+ can be expected [12] together with those related to the O - [13] and F + [14] color centers. Radioluminescence of YAP:Pr shows the maximum intensity for 1% doping level (Fig.…”

Time-resolved luminescent spectroscopy of YAG:Ce single crystal and single crystalline films

“…Most probably, this excitation bands corresponds to excitation of the emission of F þ -AD center because excitation bands of the luminescence of F þ centers in undoped YAG SC are located just in the same range (Zorenko et al, 2004). Thus, the F þ -AD centers can be also involved in excitation of the Ce 3þ luminescence in YAG:Ce SC.…”