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Method for determining the spatial distribution of emitting species

A method for determining the spatial distribution of radiation-emitting species has been developed based on absorption properties of the substance comprising the emission object and/or finite lifetime of the particles emitted. The method employs a mathematical analysis containing a solution of an integral equation by the method of statistical regularisation (STREG). The method has been applied to the experimental results reported for photon-emitting singlet excitons in anthracene single crystals.