18 May 2009 Phosphor materials under high-density XUV FEL excitation: mechanisms of luminescence quenching
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Photoluminescence of scintillator materials based on intrinsic excitonic luminescence (PbWO4), and on extrinsic luminescence from doped trivalent rare earth ions (RE3+), such as Y3Al5O12:Ce 3+ and Lu3Al5O12:Pr3+ was studied under excitation with free electron laser (FEL) light in the 50-100 eV energy range. In case of PbWO4, non-exponential behavior in the initial part of decay curves was observed depending on the FEL pulse energy, and modeled in terms of the bimolecular self-quenching process. For the RE3+ doped samples, a reduction in light yield with increasing pulse energy is observed, which can be traced to saturation of the available RE3+ sites in the crystal due to the initial high concentration of electron-hole pairs after FEL excitation.
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Sebastian Vielhauer, Sebastian Vielhauer, Vladimir Babin, Vladimir Babin, Marco De Grazia, Marco De Grazia, Eduard Feldbach, Eduard Feldbach, Marco Kirm, Marco Kirm, Vitali Nagirnyi, Vitali Nagirnyi, Andrej N. Vasil'ev, Andrej N. Vasil'ev, } "Phosphor materials under high-density XUV FEL excitation: mechanisms of luminescence quenching", Proc. SPIE 7361, Damage to VUV, EUV, and X-Ray Optics II, 73610R (18 May 2009); doi: 10.1117/12.822292; https://doi.org/10.1117/12.822292

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