SCINTILLATOR HAVING PHASE SEPARATION STRUCTURE AND RADIATION DETECTOR USING THE SAME

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PROBLEM TO BE SOLVED : To provide a scintillator which is used for radiation detection in an X-ray CT scanner or the like, and which has a unidirectional phase separation structure having an optical waveguide function eliminating the need of formation of banks for preventing crosstalk, and to provide a scintillator which has a waveguide function instead of the bank. SOLUTION : The scintillator includes : a first crystal phase including a plurality of columnar crystals having unidirectionality; and a second crystal phase for covering the side face of the first crystal phase. The first crystal phase includes a perovskite type oxide material including at least one element of Lu or Gd, and a rare earth element as an emission center. The first crystal phase emits light by radiation excitation. COPYRIGHT : (C)2013, JPO&INPIT