Photostimulated Luminescence in KClxBr1-x: Eu Phosphor Ceramics as a Two-dimensional Image Sensor Material for Ionizing Radiation

H. Nanto; Y. Douguchi; M. Kadota; J. Nishishita; M. Ikeda; T. Shinkawa; N. Kashiwagi; S. Nasu

doi:10.1541/ieejsmas.117.142

抄録

Intense photostimulated luminescence (PSL) is observed, for the first time, in X-ray-irradiated KCl_xBr_1-x:Eu phosphor ceramics. The peak in the stimulation spectrum for PSL red-shifts with increasing the Br content of KCl_xBr_1-x:Eu phosphor. The intensity of PSL with a peak at about 420nm increases linearly with increasing X-ray dose over the wide range. The KBr:Eu phosphor exhibits excellent fading characteristics at room temperature. These results strongly suggest that KCl_xBr_1-x:Eu phosphor, especially KBr:Eu phosphor is useful as a material for two-dimensional image sensor for ionizing radiation.