Study of the luminescence Properties of Dy3+or Sm3+doped Lu2Gd1Ga2Al3O12Phosphors for X-ray Imaging

초록

In this study, the Lu<inf>2</inf>Gd<inf>1</inf>Ga<inf>2</inf>Al<inf>3</inf>O<inf>12</inf>phosphor was fabricated using the solid-state reaction method, and its luminescence characteristics were studied. To confirm the crystallinity and the grain size of the Lu<inf>2</inf>Gd<inf>1</inf>Ga<inf>2</inf>Al<inf>3</inf>O<inf>12</inf>phosphor, an X-ray difraction (XRD) and FE-SEM was measured . The emission spectra of the Lu<inf>2</inf>Gd<inf>1</inf>Ga<inf>2</inf>Al<inf>3</inf>O<inf>12</inf>phosphor was measured using X-ray and UV light sources. The results comfirmed that the main peaks of Lu<inf>2</inf>Gd<inf>1</inf>Ga<inf>2</inf>Al<inf>3</inf>O<inf>12</inf>:Sm3+and Lu<inf>2</inf>Gd<inf>1</inf>Ga<inf>2</inf>Al<inf>3</inf>O<inf>12</inf>:Dy3+were between 550 to 750 nm and 450 to 800 nm, respectively. Lastly, the decay time was measured and compared to Lu<inf>2</inf>Gd<inf>1</inf>Ga<inf>2</inf>Al<inf>3</inf>O<inf>12</inf>:Sm3+and Lu<inf>2</inf>Gd<inf>1</inf>Ga<inf>2</inf>Al<inf>3</inf>O<inf>12</inf>:Dy3+phosphor. The luminescence spectra result of the X-ray was coincident to UV light sources. The Lu<inf>2</inf>Gd<inf>1</inf>Ga<inf>2</inf>Al<inf>3</inf>O<inf>12</inf>phosphor is composed of rare earth elements such as Gd<inf>2</inf>O<inf>3</inf>and Lu<inf>2</inf>O<inf>3</inf>, which have a high effective atomic Z numbers (Z<inf>eff</inf>= 55) and high detection efficiency for X-rays and gamma rays. Therefore, phosphar can be applied in fields of medical diagnostic imaging. © 2021 The Korean Physical Society. All rights reserved.

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