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 stimulable phosphor sheet has a stimulable phosphor layer formed by a vacuum film forming technique. The stimulable phosphor layer contains a europium-activated cesium bromide based stimulable phosphor as a main ingredient. A maximum intensity of emission that is generated in a wavelength range of 490-510 nm when the stimulable phosphor layer is exposed to electron beams is lower than a maximum intensity of the emission generated in a wavelength range of 440-460 nm.

Abstract: An europium activated cesium bromide phosphor having the formula of CsBr:xEu [0<x≦0.2], in which a relationship between an emission intensity (IE) of Eu2+ and a coloring intensity (IF) at F(Br−) center satisfies the condition of 0.2≦IE×IF, and/or in which a ratio of Eu2+ to Eu3+ contained in the phosphor in terms of emission intensity satisfies the condition of 5×10−5≦Eu3+/Eu2+≦0.1 gives an increased stimulated emission amount and is favorably employed for producing a radiation image storage sheet.

Abstract: A radiation image storage panel comprises a substrate and a stimulable phosphor layer overlaid on the substrate. The substrate has a plurality of protruding regions over an entire surface of the substrate. The stimulable phosphor layer comprises a plurality of pillar-shaped structures of a stimulable phosphor, which pillar-shaped structures extend in a layer thickness direction of the stimulable phosphor layer, each of the pillar-shaped structures of the stimulable phosphor having been formed with one of the protruding regions of the substrate as a starting point of the pillar-shaped structure and with a vapor phase deposition technique. A surface of the stimulable phosphor layer is formed with only the pillar-shaped structures of the stimulable phosphor, which pillar-shaped structures extend respectively from the protruding regions of the substrate.

Abstract: A radiation image storage panel having a deposited phosphor layer, wherein the phosphor layer comprises an alkali metal halide stimulable phosphor containing a small amount of oxygen atom and is annealed after deposition has high-sensitivity and gives a reproduced radiation image of high quality.

Abstract: A radiation image storage panel composed of a support and a phosphor film of a stimulable europium activated cesium bromide phosphor having the formula (I):

Abstract: The present invention provides a method for producing a rare earth activated, alkaline earth metal fluorohalide photostimulable phosphor which is expressed by a basic composition formula (Ba1−aMIIa)F(Br1−bIb):zLn, the method comprising the steps of: calcining a precursor of the rare earth activated, alkaline earth metal fluorohalide photostimulable phosphor to obtain a calcined product; and annealing the calcined product so that the following annealing conditions are met: (1) Tmp−600° C.≦Ta≦Tmp−300° C., wherein Ta is the annealing temperature (° C.), and Tmp is the melting point (° C.) of a host crystal; and (2) 10−5≦N×ta≦1, wherein ta is the processing time (in minutes), and N is the number of oxygen moles/the number of phosphor moles.

Abstract: A radiation image storage panel comprises at least a substrate and a phosphor layer overlaid upon the substrate. The phosphor layer contains a binder, a phosphor, and at least one kind of organic phosphorus compound represented by Formula (1): (R)nPO(OM)3−n  (1) in which R represents an alkyl group, an aryl group, or a heterocyclic group, which may be optionally substituted by a substituent; M represents a hydrogen atom, an alkali metal, or —N+(R1)4, where R1 represents an alkyl group having at most two carbon atoms; and n represents an integral number of 1 or 2. The radiation image storage panel exhibits enhanced dispersibility of phosphor particles and a high sensitivity and yields little noise.

Abstract: A phosphor layer of a radiation image storage panel produced by vapor phase deposition method under such condition that the phosphor layer is composed of a phosphor of a cesium chloride crystalline structure which is grown on a crystal face of (110) or (100) shows an increased sensitivity.

Abstract: An improvement of a radiation image detecting apparatus composed of a phosphor screen that converts radiation into visible light and a two-dimensionally extended photo-detector placed on one surface of the screen, resides in that the phosphor screen is composed of a partition that divides the screen on its plane to give small sections and phosphor-incorporated areas that are sectioned with the partition. The phosphor-incorporated areas and the partition scatter the visible light with scattering lengths of 20 to 200 &mgr;m and 0.05 to 20 &mgr;m, respectively, providing that a ratio of the former to the latter is 3.0 or higher, and each of the phosphor-incorporated areas and the partition absorbs the visible light with an absorption length of 1,000 &mgr;m or longer.

Abstract: A radiation image storage panel having a phosphor layer which is composed of a phosphor having a matrix component and an activator component is prepared by the steps of forming on a substrate a lower prismatic crystalline layer composed of the matrix component by vapor deposition; and forming on the lower prismatic crystalline layer an upper prismatic crystalline layer composed of the matrix component and the activator component by vapor deposition.

Abstract: The present invention provides a method and apparatus for preparing a rare earth-activated barium fluorohalide based phosphor, in which atmospheric states during calcining and during cooling can be optimally adjusted and a cooling rate can be selected in a wide range. In the preparing apparatus of the present invention, a mixture 18 of phosphor materials is calcined by a calcining furnace 10 to form a calcined product, and thereafter, the calcined product is cooled to thereby prepare a rare earth-activated barium fluorohalide based phosphor. A calcining region 12 in which the mixture of phosphor materials can be calcined is provided in the calcining furnace 10, and a portion of the calcining region 12 is connected, via a partition door 30 capable of being opened and closed, to a cooling region 28 in which the calcined product can be cooled, at an outer side of the calcining furnace 10.

Abstract: The present invention provides a method for producing a rare earth activated, alkaline earth metal fluorohalide photostimulable phosphor which is expressed by a basic composition formula (Ba1−aMIIa)F(Br1−bIb):zLn, the method comprising the steps of: calcining a precursor of the rare earth activated, alkaline earth metal fluorohalide photostimulable phosphor to obtain a calcined product; and annealing the calcined product so that the following annealing conditions are met: (1) Tmp−600° C.≦Ta≦Tmp−300° C., wherein Ta is the annealing temperature (° C.), and Tmp is the melting point (° C.) of a host crystal; and (2) 10−5≦N×ta≦1, wherein ta is the processing time (in minutes), and N is the number of oxygen moles/the number of phosphor moles.

Abstract: A radiation image detecting system includes a solid radiation detector formed of a first conductive layer which is transparent to recording radiations, a recording photoconductive layer which exhibits photoconductivity upon exposure to the recording radiations passing through the first conductive layer, a charge transfer layer which acts substantially as an insulator to electric charges of the same polarity as that in which the first conductive layer is charged and as a conductor to electric charges reverse to that in which the first conductive layer is charged, a read-out photoconductive layer which exhibits photoconductivity upon exposure to read-out electromagnetic waves, and a second conductive layer which is transparent to the read-out electromagnetic waves. These layers are superposed one on another in this order. A radiation absorbing member which is formed of material absorbent of the recording radiations is provided on the second conductive layer side of the solid radiation detector.

Abstract: A stimulable phosphor sheet having one-dimensionally extended partitions comprising stimulating ray-reflecting material and dividing a plane of the phosphor sheet to give plural narrow sections, and a stimulable phosphor placed separately in the narrow sections is favorably employed in a radiation image reproducing method by scanning stimulating rays in a direction of crossing the partitions.

Abstract: A green light emitting from a terbium-samarium co-activated alkaline earth metal rare earth oxide phosphor which is composed of an oxygen atom and a composition of the formula:

Abstract: Disclosed herein is a radiation image conversion panel that has a phosphor layer.

Abstract: An europium activated cesium bromide phosphor having the formula of CsBr:xEu [0<x≦0.2], in which a relationship between an emission intensity (IE) of Eu2+ and a coloring intensity (IF) at F (Br−) center satisfies the condition of 0.2≦IExIF, and/or in which a ratio of Eu2+ to Eu3+ contained in the phosphor in terms of emission intensity satisfies the condition of 5×10−5≦Eu3+/Eu2+≦0.1 gives an increased stimulated emission amount and is favorably employed for producing a radiation image storage sheet.

Abstract: A method of preparing a barium fluorohalide phosphor including a mixing step in which phosphor materials are mixed, a firing step in which a resulting mixture of phosphor materials is fired, an annealing step, and a cooling step in which the mixture of phosphor materials is cooled to the ordinary temperature. In the firing step, after the mixture of phosphor materials has been fired at a constant temperature, an atmosphere at the time of the firing is removed while the constant temperature is maintained, and is replaced with an atmosphere different from the atmosphere at the time of the firing, and thereafter, annealing is carried out. In the cooling step, the atmosphere at the time of the firing is removed and replaced with a first different atmosphere, and then first cooling is carried out. Further, the first atmosphere is removed and replaced with a second atmosphere, and then second cooling is carried out.

Abstract: A method for processing electric signals of a radiographic image which are obtained by the steps of scanning a stimulating light beam on a stimulable phosphor sheet comprising a stimulating light-reflective or -absorbent grid and stimulable phosphor-containing microcells surrounded by the grid and having a radiographic image recorded therein in a direction along the grid and photoelectrically collecting in sequence stimulated emissions emitting from the microcells, is favorably performed by detecting a signal of a grid surrounding a microcell and a signal strength corresponding to the microcell surrounded by the grid; determining a correcting value for the detected signal strength; repeating the step of determining a correcting value for a signal strength in each microcell; and processing each signal strength detected in each microcell using each correcting value determined in each microcell, in consideration of a predetermined pixel size of the radiographic image, to obtain a corrected radiographic image dat