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Abstract
In this letter, we repot a new radio-photoluminescence (RPL) material. The RPL was observed non-doped Li2CO3 ceramics sintered in vacuum. Under 340 ± 40 nm excitation, a photoluminescence (PL) emission peak appeared around 470 nm, the intensity of which increases with X-ray irradiation dose. The RPL signal was very sensitive to X-ray dose, and the response signal was measurable as low as 0.1 mGy although the synthesis and measurement set-up were not optimized. This sensitivity is equivalent to that of commercial RPL dosimeters. In addition, the effective atomic number of Li2CO3 (Zeff = 7.32) is closer to that of biological tissue than any other dosimeter materials used in practice. From these reasons, we believe that this material should be a promising candidate for RPL dosimeters.
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