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The excitation in a thin surface layer of a pure anthracene crystal (λ ex  = 366 nm) leads to a decay which is in desagreement with the theory of delayed fluorescence. We interpret this decay as a manifold exponential decay due to traps on the crystal surface.

Einfluß von Oberflächenfallen auf das Abklingverhalten der verzögerten Fluoreszenz des reinen Anthracens