Abstract: A radiation detector is constituted by: a recording photoconductive layer; and electrodes provided on both sides of the photoconductive layer. Electric charges, which are generated within the recording photoconductive layer when radiation is irradiated thereon while a predetermined biasing voltage is being applied between the electrodes, are read out as electric signals. The recording photoconductive layer is formed by amorphous selenium that contains alkali metal elements within a range from 0.0007 atomic ppm to 0.0035 atomic ppm.

Abstract: A solid state radiation sensor, in which an electrode is disposed on each side of a recording photoconductive layer, and charges generated in the recording photoconductive layer by the irradiation of radiation, with a predetermined bias voltage being applied between the electrodes, are detected as electrical signals. Here, a predetermined region is provided between the electrodes, and the average density of an alkali metal in the predetermined region is greater than or equal to 10 times the average density of the alkali metal in the area between the electrodes other than the predetermined region.

Abstract: Bi12MO20 material particles with a diameter of 0.1 to 2 ?m, which are filled in an aerosolization chamber, are shaken/agitated together with carrier gas in a high-pressure gas cylinder which stores the carrier gas, thereby being aerosolized. The aerosolized Bi12MO20 material particles are injected together with the carrier gas onto a substrate from a nozzle in a film-forming chamber, the nozzle including a narrow opening, and the Bi12MO20 material particles are deposited onto the substrate, thereby being formed into a film.

Abstract: A radiation detector is constituted by: a recording photoconductive layer; and electrodes provided on both sides of the photoconductive layer. Electric charges, which are generated within the recording photoconductive layer when radiation is irradiated thereon while a predetermined biasing voltage is being applied between the electrodes, are read out as electric signals. The recording photoconductive layer is formed by amorphous selenium that contains alkali metal elements within a range from 0.0007 atomic ppm to 0.0035 atomic ppm.

Abstract: A photo-conductor layer for constituting a radiation imaging panel, which photo-conductor layer is capable of recording radiation image information as an electrostatic latent image, is produced. The photo-conductor layer contains a Bi12MO20 sintered material, in which M represents at least one kind of element selected from the group consisting of Ge, Si, and Ti. Sintering processing for the formation of the Bi12MO20 sintered material is performed in an inert gas, atmosphere. Alternatively, the sintering processing is performed at a sintering temperature falling within the range of 800° C. to 900° C. and in an atmosphere, in which an oxygen partial pressure PO2 (Pa) satisfies the condition 10?3?PO2?10?1.

Abstract: A photoconductive layer formed of a Bi12MO20 sintered body is manufactured without being fused with a setter. An oxide material in which a content of silicon oxide is 1 wt %, and more preferably, 0.3 wt % or less, is used as a setter which mounts a Bi12MO20 molded body (where M is at least one of Ge, Si and Ti) thereon.

Abstract: A photo-conductive layer for constituting a radiation imaging panel, which photo-conductive layer is capable of recording radiation image information as an electrostatic latent image, contains Bi4M3O12, in which M represents at least one kind of element selected from the group consisting of Ge, Si, and Ti. The photo-conductive layer may be formed with a coating technique or as a sintered film. The photo-conductive layer has a large effect of collecting formed electric charges and enhanced sensitivity, and is capable of yielding an image with good graininess characteristics.

Abstract: The present invention provides a black and white photothermographic material having, on at least one side of a support, an image forming layer containing at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, and a binder, as well as an image forming method. The black and white photothermographic material is characterized in that 50% or more of a total projected area of the photosensitive silver halide is occupied by tabular grains having a (111) face as a major face; the tabular grains have at least 2 parallel twin crystal planes in a grain; and a variation coefficient of a distribution of distances between closest twin crystal planes is 20% or less. Also provided is an image forming method that includes image exposure using fluorescent intensifying screens and thermal development.

Abstract: A radiation image storage panel having a phosphor layer formed by a gas phase-accumulation method, in which wherein the phosphor layer is composed of an alkali metal halide stimulable phosphor activated by an activator, and the crystal lattice in the phosphor layer has a lattice distortion in the range of 0.035 to 0.30%.

Abstract: A solid state radiation sensor, in which an electrode is disposed on each side of a recording photoconductive layer, and charges generated in the recording photoconductive layer by the irradiation of radiation, with a predetermined bias voltage being applied between the electrodes, are detected as electrical signals. Here, a predetermined region is provided between the electrodes, and the average density of an alkali metal in the predetermined region is greater than or equal to 10 times the average density of the alkali metal in the area between the electrodes other than the predetermined region.

Abstract: A photoconductive layer for a radiation image taking panel is formed by selenium alloy containing 0.1 to 1000 molar ppm of monovalent metal and 0.1 to 1000 molar ppm of a chalcogenide element other than Se or selenium alloy containing 0.1 to 1000 molar ppm of monovalent metal and 0.1 to 4000 molar ppm of a V group element.

Abstract: A photoconductive layer for use in a radiation imaging panel which records an electrostatic latent image representing a radiographic image, formed of a bismuth-mixed metal oxide Bi12MO20 so as to exhibit a first light reflectance at a first wavelength of 750 nm and a second light reflectance at a second wavelength of 350 nm, where M is at least one of Ge, Si, and Ti, and the first light reflectance is seven or more times greater than the second light reflectance.

Abstract: An electrostatic recording medium includes: a first conductive layer which is transparent to radiation for recording; a recording-side photoconductive layer which is formed above the first conductive layer and becomes conductive when the recording-side photoconductive layer is exposed to the radiation for recording; a charge-accumulation region which is formed above the recording-side photoconductive layer and accumulates electric charges being generated in the recording-side photoconductive layer and having a latent polarity; a reading-side photoconductive layer which is formed of inorganic oxide above the charge-accumulation region and becomes conductive when the reading-side photoconductive layer is exposed to an electromagnetic wave for reading; and a second conductive layer which is formed above the reading-side photoconductive layer and transparent to the electromagnetic wave for reading.

Abstract: A radiation image storage panel composed of a support, a phosphor matrix compound layer covering a surface of the support at a coverage percentage of 95% or more, and a stimulable phosphor layer (which is composed of multiple prismatic stimulable phosphor crystals standing on the phosphor matrix compound layer) formed on the phosphor matrix compound layer shows a high peel resistance between the support and the stimulable phosphor layer, and a high sensitivity, and gives a reproduced radiation image of high quality.

Abstract: In a radiation image storage panel having a phosphor layer which is produced by gas phase deposition and composed of prismatic phosphors, the phosphor layer has a relative density higher or same on a lower side than or as on a upper side, and the prismatic phosphors have a diameter which is larger on a upper side than on a lower side.

Abstract: The present invention provides a black and white photothermographic material having, on at least one side of a support, an image forming layer containing at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, and a binder, as well as an image forming method. The black and white photothermographic material is characterized in that 50% or more of a total projected area of the photosensitive silver halide is occupied by tabular grains having a (111) face as a major face; the tabular grains have at least 2 parallel twin crystal planes in a grain; and a variation coefficient of a distribution of distances between closest twin crystal planes is 20% or less. Also provided is an image forming method that includes image exposure using fluorescent intensifying screens and thermal development.

Abstract: A photo-conductor layer for constituting a radiation imaging panel, which photo-conductor layer is capable of recording radiation image information as an electrostatic latent image, is produced. The photo-conductor layer contains a Bi12MO20 sintered material, in which M represents at least one kind of element selected from the group consisting of Ge, Si, and Ti. Sintering processing for the formation of the Bi12MO20 sintered material is performed in an inert gas, atmosphere. Alternatively, the sintering processing is peiformed at a sintering temperature falling within the range of 800° C. to 900° C. and in an atmosphere, in which an oxygen partial pressure PO2 (Pa) satisfies the condition 10?3?PO2?10?1.

Abstract: A photoconductive layer formed of a Bi12MO20 sintered body is manufactured without being fused with a setter. An oxide material in which a content of silicon oxide is 1 wt %, and more preferably, 0.3 wt % or less, is used as a setter which mounts a Bi12MO20 molded body (where M is at least one of Ge, Si and Ti) thereon.

Abstract: Bi12MO20 material particles with a diameter of 0.1 to 2 ?m, which are filled in an aerosolization chamber, are shaken/agitated together with carrier gas in a high-pressure gas cylinder which stores the carrier gas, thereby being aerosolized. The aerosolized Bi12MO20 material particles are injected together with the carrier gas onto a substrate from a nozzle in a film-forming chamber, the nozzle including a narrow opening, and the Bi12MO20 material particles are deposited onto the substrate, thereby being formed into a film.

Abstract: A photoconductive layer included in a radiation imaging panel for recording radiation image information as an electrostatic latent image is a polycrystal made of Bi12MO20, where M is at least one of Ge, Si and Ti, the filling factor of Bi12MO20 composing the photoconductive layer is 70% or more, and the thickness of the photoconductive layer is between 50 ?m and 600 ?m inclusive.