The Research of Ce3+-doped Lu2Gd1Ga2Al3O12 Phosphor for X-ray Imaging

초록

Ce3+-doped Lu2Gd1Ga2Al3O12 phosphor is fabricated by solid-state reaction method using an electric furnace at 1500 ◦C for 12 hours and measured by an X-ray diffractometer (XRD) and a field emission scanning electron microscope (FE-SEM) to confirm the crystalline structure. The luminescence properties for UV and X-ray is investigated using X-ray and UV sources, respectively. The emission wavelength of the Ce3+-doped Lu2Gd1Ga2Al3O12 phosphor for UV and X-ray is confirmed at 525 nm because of 2D<inf>5/2</inf> to 2F<inf>5/2</inf> transition. This wavelength is coincident with yellow color in the CIE chromaticity diagram. The rare earth element-containing phosphors have a high absorption efficiency for X-ray and gamma-ray because of their high atomic Z numbers (Z<inf>eff</inf> = 55); therefore, they have an advantage for medical imaging fields using X-ray and gamma-ray. © 2022 The Korean Physical Society. All rights reserved.

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