Abstract: In a scintillator used for radiation detection, such as an X-ray CT scanner, a scintillation crystal body having a unidirectional phase separation structure is provided which has a light guide function for crosstalk prevention without using partitions. The phase separation structure includes a first crystal phase and a second crystal phase having a refractive index larger than that of the first crystal phase and which have a first principal surface and a second principal surface, these principal surfaces being not located on the same plane, the first principal surface and the second principal surface have portions to which the second crystal phase is exposed, and a portion of the second crystal phase exposed to the first principal surface and a portion of the second crystal phase exposed to the second principal surface are connected to each other.

Abstract: In a scintillator used for radiation detection, such as an X-ray CT scanner, a scintillation crystal body having a unidirectional phase separation structure is provided which has a light guide function for crosstalk prevention without using partitions. The phase separation structure includes a first crystal phase and a second crystal phase having a refractive index larger than that of the first crystal phase and which have a first principal surface and a second principal surface, these principal surfaces being not located on the same plane, the first principal surface and the second principal surface have portions to which the second crystal phase is exposed, and a portion of the second crystal phase exposed to the first principal surface and a portion of the second crystal phase exposed to the second principal surface are connected to each other.

Abstract: There is provided a compound represented by the general formula Cs3Cu2[I1-xClx]5, wherein x is 0.71 or more and 0.79 or less. Also, there is provided a method for producing a compound, comprising mixing cesium iodide, cesium chloride, and copper chloride together in such a manner that the molar ratio of cesium to copper to iodine to chlorine is 3:2:5(1-x):5x (wherein 0.71?x?0.79), melting the resulting mixture, and solidifying the resulting molten material to give a compound.

Abstract: A method of forming a film, including the steps of preparing a base plate having a first region and a second region comprised of mutually different materials wherein at least one of the materials is an oxide and selectively conducting a film deposition on either one of the first region and the second region by a bias sputtering. Both the first and second regions can be formed of an oxide. Further, provided is a vapor film deposition method including irradiating a substrate having a plurality of regions of different constituent element groups composed of at least one element with a source material element group composed of at least one element to be deposited and ionized elements.

Abstract: Provided is a scintillator used for radiation detection in an X-ray CT scanner or the like, the scintillator having a unidirectional phase separation structure having an optical waveguide function, which eliminates the need of formation of banks for preventing crosstalk. The scintillator has a waveguide function instead of the banks or the like. The scintillator includes: a first crystal phase including multiple columnar crystals having unidirectionality; and a second crystal phase for covering a side of the first crystal phase. The first crystal phase includes a perovskite type oxide material including at least one element selected from the group consisting of Lu and Gd, and a rare earth element as an emission center. The first crystal phase emits light by radiation excitation.

Abstract: Provided is a scintillator having a function of waveguiding scintillation light to a photodetector and having a structure for increasing an amount of absorption of radiation. The scintillator has a first surface and a second surface which are not located on a same surface, and includes: a first phase; and a second phase having a refractive index higher than that of the first phase and having a linear attenuation coefficient different from that of the first phase, in which one of the first phase and the second phase includes multiple columnar portions arranged in a direction from the first surface to the second surface, and the multiple columnar portions are stacked in a state in which end faces of the columnar portions are partly offset with respect to each other in a direction parallel to the first surface or the second surface.

Abstract: In a scintillator used for radiation detection, such as an X-ray CT scanner, a scintillation crystal body having a unidirectional phase separation structure is provided which has a light guide function for crosstalk prevention without using partitions. The phase separation structure includes a first crystal phase and a second crystal phase having a refractive index larger than that of the first crystal phase and which have a first principal surface and a second principal surface, these principal surfaces being not located on the same plane, the first principal surface and the second principal surface have portions to which the second crystal phase is exposed, and a portion of the second crystal phase exposed to the first principal surface and a portion of the second crystal phase exposed to the second principal surface are connected to each other.

Abstract: Provided is a scintillator used for detecting radiation in an X-ray CT scanner or the like, the scintillator having a unidirectional phase separation structure having an optical waveguide function, which eliminates the need of formation of partition walls for preventing crosstalks. The scintillator has the phase separation structure including: a first crystal phase including multiple columnar crystals having unidirectionality; and a second crystal phase filling space on the side of the first crystal phase. The second crystal phase includes a material represented by Cs3Cu2[XaY1-a]5, where X and Y are elements which are different from each other and which are selected from the group consisting of I, Br, and Cl, and 0?a?1 is satisfied.

Abstract: A radiation detector including a scintillator structure comprising a first plane and a second plane which are not positioned on the same plane, the scintillator structure having an optical waveguiding property in a direction between the first plane and the second plane; and a two-dimensional light receiving element formed of multiple pixels which are disposed parallel to either one of the first plane and the second plane. The radiation detector includes at least one smoothness-deteriorate region which is positioned in one of the first plane and the second plane of the scintillator structure and has an area of 1/6 or more of a light receiving area of each of the multiple pixels. The region is repaired by an optically transparent material so as to be smoothed.

Abstract: Provided is a scintillator used for detecting radiation in an X-ray CT scanner or the like, the scintillator having a unidirectional phase separation structure having an optical waveguide function, which eliminates the need of formation of partition walls for preventing crosstalks. The scintillator has the phase separation structure including: a first crystal phase including multiple columnar crystals having unidirectionality; and a second crystal phase filling space on the side of the first crystal phase. The second crystal phase includes a material represented by Cs3Cu2[XaY1-a]5, where X and Y are elements which are different from each other and which are selected from the group consisting of I, Br, and Cl, and 0?a?1 is satisfied.

Abstract: In a scintillator used for radiation detection, such as an X-ray CT scanner, a scintillation crystal body having a unidirectional phase separation structure is provided which has a light guide function for crosstalk prevention without using partitions. The phase separation structure includes a first crystal phase and a second crystal phase having a refractive index larger than that of the first crystal phase and which have a first principal surface and a second principal surface, these principal surfaces being not located on the same plane, the first principal surface and the second principal surface have portions to which the second crystal phase is exposed, and a portion of the second crystal phase exposed to the first principal surface and a portion of the second crystal phase exposed to the second principal surface are connected to each other.

Abstract: A radiation detecting device is manufactured by a method that includes forming a scintillator layer on a substrate carrying a plurality of photodetectors and a plurality of convex patterns each including a plurality of convexities, the plurality of convex patterns coinciding with the respective photodetectors, the scintillator layer being formed in such a manner as to extend over the plurality of convex patterns; and forming a crack in a portion of the scintillator layer that coincides, in a stacking direction, with a gap between adjacent ones of the convex patterns by cooling the substrate carrying the scintillator layer. The plurality of convex patterns satisfy specific conditions.

Abstract: A scintillator crystal to be used for a radiation detector such as X-ray CT apparatus has a unidirectional phase-separated structure and provides a light guiding function without forming partitions to prevent any crosstalk. The scintillator crystal comprises a phase-separated structure including a plurality of first crystal phases of the columnar crystals with unidirectionality and a second crystal phase covering lateral surfaces of the first crystal phases. At least the second crystal phase comprises CuI and emits light when excited by radiation.

Abstract: A porous scintillator crystal capable of suppressing scattering of light that represents a high spatial resolution is provided. The porous scintillator crystal comprises a porous structure including voids, wherein the porous structure is a phase-separated structure having voids formed therein and comprises materials constituting a eutectic composition of the phase-separated structure and at least one void in the porous structure extend in a direction perpendicular to a principal plane of the porous scintillator crystal.

Abstract: There is provided a compound represented by the general formula Cs3Cu2[I1-xClx]5, wherein x is 0.71 or more and 0.79 or less. Also, there is provided a method for producing a compound, comprising mixing cesium iodide, cesium chloride, and copper chloride together in such a manner that the molar ratio of cesium to copper to iodine to chlorine is 3:2:5(1-x):5x (wherein 0.71?x?0.79), melting the resulting mixture, and solidifying the resulting molten material to give a compound.

Abstract: Provided is a scintillator used for detecting radiation in an X-ray CT scanner or the like, the scintillator having a unidirectional phase separation structure having an optical waveguide function, which eliminates the need of formation of partition walls for preventing crosstalks. The scintillator has the phase separation structure including: a first crystal phase including multiple columnar crystals having unidirectionality; and a second crystal phase filling space on the side of the first crystal phase. The second crystal phase includes a material represented by Cs3Cu2[XaY1-a]5, where X and Y are elements which are different from each other and which are selected from the group consisting of I, Br, and Cl, and 0?a?1 is satisfied.

Abstract: A scintillator material contains a compound represented by a general formula [Cs1-zRbz][I1-x-yBrxCly]:In. In the general formula, x, y, and z satisfy any one of conditions (1), (2), and (3) below. (1) When 0<x+y<1 and z=0, at least one of Mathematical formula 1 and Mathematical formula 2 is satisfied. (2) When 0<x+y<1 and 0<z<1, at least one of Mathematical formula 3 and 0<y<1 is satisfied. (3) When x=y=0, the relationship 0<z<1 is satisfied. The content of indium (In) is 0.00010 mole percent or more and 1.0 mole percent or less relative to [Cs1-zRbz][I1-x-yBrxCly]. [Math. 1] 0<x?0.7??(Math. 1) 0<y?0.8??(Math. 2) 0<x?0.8??(Math.

Abstract: Provided is a radiation detector, including: a two-dimensional light receiving element including a plurality of pixels; and a scintillator layer having multiple scintillator crystals two-dimensionally arranged on a light receiving surface of the two-dimensional light receiving element, in which: the scintillator crystal includes two crystal phases, which are a first crystal phase including a material including a plurality of columnar crystals extending in a direction perpendicular to the light receiving surface of the two-dimensional light receiving element and having a refractive index n1, and a second crystal phase including a material existing between the plurality of columnar crystals and having a refractive index n2; and a material having a refractive index n3 is placed between adjacent scintillator crystals, the refractive index n3 satisfying a relationship of one of n1?n3?n2 and n2?n3?n1.

Abstract: Provided is a radiation detecting device, including: a scintillator which emits light when radiation is irradiated thereto; and a photosensor array having light receiving elements for receiving the emitted light which are two-dimensionally arranged, in which: the scintillator has a phase separation structure for propagating the light emitted inside the scintillator in a light propagating direction, the phase separation structure being formed by embedding multiple columnar portions formed of a first material in a second material; the radiation is irradiated to the scintillator from a direction which is not in parallel to the light propagating direction; and the light emitted inside the scintillator is propagated through the scintillator in the light propagating direction and is received by the photosensor array which is placed so as to face an end face of the scintillator.

Abstract: A radiation detector including a scintillator structure comprising a first plane and a second plane which are not positioned on the same plane, the scintillator structure having an optical waveguiding property in a direction between the first plane and the second plane; and a two-dimensional light receiving element formed of multiple pixels which are disposed parallel to either one of the first plane and the second plane. The radiation detector includes at least one smoothness-deteriorate region which is positioned in one of the first plane and the second plane of the scintillator structure and has an area of 1/6 or more of a light receiving area of each of the multiple pixels. The region is repaired by an optically transparent material so as to be smoothed.