Abstract: The radiation image conversion panel includes a phosphor layer formed by a vapor-phase deposition and solely formed of columnar crystals, a matrix layer formed under the phosphor layer, is substantially free of an activator of a phosphor, and has a columnar crystal region and an underlying non-columnar crystal region and a substrate which supports the matrix layer and the phosphor layer formed on the matrix layer. The process for producing the radiation image conversion panel forms on the substrate the matrix layer and forms the phosphor layer by the vapor-phase deposition. The formation of the phosphor layer is started after a crystal structure of an upper region of the matrix layer has changed from a non-columnar to a columnar.

Abstract: The radiation image conversion panel includes a substrate and a phosphor layer of columnar crystals formed on the substrate by vapor-phase deposition, with a column diameter distribution of the columnar crystals having two or more peaks. The process for producing a radiation image conversion panel prepares a substrate on which two or more types of projections different in diameter are formed and satisfies Expression “0.4R?r?0.8R” where R is a diameter of a largest projection and r is a diameter of any one of the remainder in the two or more types of projections, thereby making a surface of the substrate uneven and forms a phosphor layer on the uneven surface of the substrate by vapor-phase deposition.

Abstract: In a radiation image storage panel having a support, an underlayer, and a phosphor layer of a phosphor composed of a matrix compound and an activator and is formed on the underlayer by a gas phase-accumulation method, the underlayer consists essentially of the matrix compound and has a relative density lower than a relative density of the phosphor layer.

Abstract: A phosphor panel favorably employable for medical diagnosis of chest has a phosphor layer formed on a substrate by a gas phase-accumulation method, in which the phosphor layer is composed of a large number of phosphor columns standing parallel to each other, in which the phosphor columns have a mean diameter of 0.1 to 50 ?m at a top surface thereof, and there are no phosphor columns having a diameter larger than 200 ?m at the top surface.

Abstract: A radiation image conversion panel includes a substrate, a phosphor layer formed on the substrate by vapor-phase deposition, and a protective layer covering entirely the phosphor layer to hermetically seal it. A color at a surface of the panel on which exciting light is incident has a density of 0.001 to 0.095 and the color is a color corresponding to a wavelength of 440 nm. A process for producing the panel forms the phosphor layer on the substrate by the vapor-phase deposition and subjects the phosphor layer to a thermal treatment. The process may subject as the thermal treatment the phosphor layer to one or more cycles of a first thermal treatment for heating and cooling it and to only one cycle of a second thermal treatment for heating it in a presence of oxygen. The process further subjects the phosphor layer to humidification which is a treatment for making it absorb moisture.

Abstract: The process for producing a radiation image conversion panel forms a phosphor layer on a substrate by vapor-phase deposition in a vacuum chamber and subjects the formed phosphor layer to a thermal treatment to obtain the radiation image conversion panel. The phosphor layer is protected by a selectively permeable cover after completion of the vapor-phase deposition until completion of the thermal treatment. Or the foreign matter on a surface of the phosphor layer is removed prior to the thermal treatment performed on the phosphor layer.

Abstract: The radiation image conversion panel includes a substrate and a phosphor layer of columnar crystals formed on the substrate by vapor-phase deposition, with a column diameter distribution of the columnar crystals having two or more peaks. The process for producing a radiation image conversion panel prepares a substrate on which two or more types of projections different in diameter are formed and satisfies Expression “0.4R?r?0.8R” where R is a diameter of a largest projection and r is a diameter of any one of the remainder in the two or more types of projections, thereby making a surface of the substrate uneven and forms a phosphor layer on the uneven surface of the substrate by vapor-phase deposition.

Abstract: The radiation image conversion panel includes a stimulable phosphor layer formed by a vapor-phase deposition and solely formed of columnar crystals, a matrix layer formed under the stimulable phosphor layer, is substantially free of an activator of a stimulable phosphor, and has a columnar crystal region and an underlying non-columnar crystal region and a substrate which supports the matrix layer and the stimulable phosphor layer formed on the matrix layer. The process for producing the radiation image conversion panel forms on the substrate the matrix layer and forms the stimulable phosphor layer by the vapor-phase deposition. The formation of the stimulable phosphor layer is started after a crystal structure of an upper region of the matrix layer has changed from a non-columnar to a columnar.

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 radiation image storage panel has a phosphor layer composed of a phosphor matrix compound and an activator in combination, a subbing layer composed of the phosphor matrix compound, and a support, in which both of the subbing layer and phosphor layer have been formed by a gas phase-accumulation method and in which the subbing layer has a relative density of 60% to 98%, and a surface of the support in contact with the subbing layer shows a contact angle of less than 50° to water.

Abstract: A radiation image storage panel has a phosphor layer formed by a gas phase-accumulation method, in which the phosphor layer is composed of a lower sub-layer of a spherical crystal structure and an upper sub-layer of a columnar crystal structure.

Abstract: A radiation image storage panel has a phosphor layer composed of a phosphor matrix compound and an activator in combination, a subbing layer composed of the phosphor matrix compound, and a support, in which both of the subbing layer and phosphor layer have been formed by a gas phase-accumulation method and in which the subbing layer has a relative density of 60% to 98%, and a surface of the support in contact with the subbing layer shows a contact angle of less than 50° to water.

Abstract: In a radiation image storage panel composed of a phosphor layer produced by vapor phase deposition, the phosphor layer is composed of an europium activated cesium halide stimulable phosphor and exhibits an ultraviolet light-excited emission spectrum satisfying the condition of: 0<S(400–420)<0.20 in which S(400–420) represents a ratio of an amount of a light emitted by a luminous component giving an emission peak in the region of 400 to 420 nm based on the total amount of emitted light.

Abstract: A radiation image storage panel favorably employable for medical diagnosis of chest has a phosphor layer formed on a substrate by a gas phase-accumulation method, in which the phosphor layer is composed of a large number of phosphor columns standing parallel to each other, in which the phosphor columns have a mean diameter of 0.1 to 50 ?m at a top surface thereof, and there are no phosphor columns having a diameter larger than 200 ?m at the top surface.

Abstract: A stimulable phosphor sheet is prepared by applying an electron beam to a stimulable phosphor or its source in a vacuum to vaporize a phosphor or its source and depositing the vaporized phosphor or source on the support, under the condition that the electron beam is applied to the stimulable phosphor or source at an accelerating voltage of 1.5 kV to 5.0 kV. The stimulable phosphor or its source is preferably in the form of a solid having a relative density of 80% to 98%.

Abstract: A radio-conductive material which exhibits conductivity upon exposure to radiations is formed of alcohol-soluble nylon and inorganic material having radiation absorbing power.

Abstract: A radio-conductive material which exhibits conductivity upon exposure to radiations is formed of alcohol-soluble nylon and inorganic material having radiation absorbing power.

Abstract: The vacuum deposition device includes a vacuum deposition chamber, a vacuum evacuator for evacuating an inside of the chamber, an evaporating unit for evaporating one or more film forming materials in the chamber, a holding unit provided above the evaporating unit for holding a substrate for the vacuum deposition, and a preventing unit for preventing evaporated particles of the one or more materials from adhering to the substrate when the vacuum deposition is carried out at a pressure of 0.05 to 10 Pa. The pretreatment method for the vacuum deposition prepares the prevention unit in the chamber and melts the one or more materials by heating in the chamber at the pressure of 0.05 to 10 Pa while preventing the evaporated particles from adhering to the substrate by using the preventing unit.

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 (IP) 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: In a radiation image storage panel having a support, an underlayer, and a phosphor layer of a phosphor composed of a matrix compound and an activator and is formed on the underlayer by a gas phase-accumulation method, the underlayer consists essentially of the matrix compound and has a relative density lower than a relative density of the phosphor layer.