Ce3+doped BaO-Gd2O3-P2O5 glass: New glass scintillator for X-rays detector and imaging applications

초록

The preparation and characterization of glasses with BaO-Gd2O3-P2O5-CeF3 system were proceeded in this work for scintillator material. Glass density tends to decrease while the molar volume increases with CeF3 addition. Glasses strongly absorb photons in UV region with redshift of absorption edge but it has high transmittance for visible light. The optimum CeF3 concentration is 0.50 mol% which Ce3+ in glass exhibit the strong photoluminescence around 332-338 nm under direct Ce3+ excitation and Gd3+- Ce3+ energy transfer. The photoluminescence decay time of Ce3+ tends to increase by adding CeF3 that value of 0.50 mol% doped glass is short around 27 ns. X-rays induced luminescence spectra exhibit the similar pattern to that of photoluminescence spectra with Gd3+ -> Ce3+ energy transfer. The integral scintillation efficiency of 0.50 mol% doped glass is around 42 % compared to BGO crystal. This glass was operated in the practical X-ray imaging which created the quality image by a spatial resolution of 37.6 LP/mm. The developed glass owns high luminescence potential for using as a scintillator in X-ray detector and imaging applications.

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