Abstract
This work reports the scintillator properties of barium aluminate undoped, Ce-doped and Ce and Mn co-doped phosphors. The samples were produced using the PVA-modified sol-gel route. The oxidation states of the dopants were investigated by X-ray absorption spectroscopy in the range of excitation energies that includes Ba LIII-edge, Ce LIII-edge and Mn K-edge. A multiple valence mixture was observed for both cerium and manganese. The luminescent centers were investigated using X-ray excited optical luminescence (XEOL) near the absorption LIII-edge of barium. The host emissions, as well as characteristic emissions from the dopants, were observed. The color of the scintillator emission was tuned by varying the co-dopant concentration.
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