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Proceedings Paper

Phosphor materials under high-density XUV FEL excitation: mechanisms of luminescence quenching
Author(s): Sebastian Vielhauer; Vladimir Babin; Marco De Grazia; Eduard Feldbach; Marco Kirm; Vitali Nagirnyi; Andrej N. Vasil'ev
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Paper Abstract

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.

Paper Details

Date Published: 18 May 2009
PDF: 9 pages
Proc. SPIE 7361, Damage to VUV, EUV, and X-Ray Optics II, 73610R (18 May 2009); doi: 10.1117/12.822292
Show Author Affiliations
Sebastian Vielhauer, Univ. of Tartu (Estonia)
Vladimir Babin, Univ. of Tartu (Estonia)
Marco De Grazia, Commissariat à l'Energie Atomique (France)
Eduard Feldbach, Univ. of Tartu (Estonia)
Marco Kirm, Univ. of Tartu (Estonia)
Vitali Nagirnyi, Univ. of Tartu (Estonia)
Andrej N. Vasil'ev, Moscow State Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 7361:
Damage to VUV, EUV, and X-Ray Optics II
Libor Juha; Saša Bajt; Ryszard Sobierajski, Editor(s)

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