Photoluminescence Spectroscopy of an Aqueous Solution of Uranyl Cloride upon Laser and LED Excitation

The excitation of an aqueous solution of uranyl chloride by a 410-nm semiconductor LED and 266- and 448-nm lasers is found to induce intense photoluminescence: several bands in the blue-green spectral range (494 to 565 nm). Upon excitation of uranyl chloride aqueous solution by a 468-nm LED, the photoluminescence spectrum is a relatively narrow strong band peaking at 508 nm, which was interpreted as the transition from spontaneous photoluminescence to superluminescence. A lasing scheme (similar to that for dye lasers) has been proposed.