230results about "Conversion screens" patented technology

The invention discloses a hexagonal boron nitride neutron scintillation screen with a high n / gamma inhibition ratio, and a preparation method of the hexagonal boron nitride neutron scintillation screen comprises the following steps: putting a SiC single crystal substrate into a CVD furnace, vacuumizing the furnace body, heating the substrate to a reaction temperature, introducing raw material gases BCl3 and NH3, or BF3 and NH3 and a carrier gas N2 into the furnace, heating the substrate to a reaction temperature, and carrying out a reaction for 2-3 hours; meanwhile, a small amount of carbon-containing gas is added for doping, so that the boron nitride film has efficient light-emitting performance, and the hexagonal boron nitride neutron scintillation screen is obtained after heat-preservation growth, power-off cooling and stripping from the substrate. The scintillation screen is composed of elements with small atomic mass and has high n / gamma resolution capability. The invention provides a neutron scintillation screen-carbon doped hexagonal boron nitride (h-BN: C) with a high n / gamma inhibition ratio. A carbon source is introduced in the growth process of an h-BN film to dope the h-BN, so that the h-BN film displays 300-800nm wide spectrum emission.

Several new techniques for designing nanophotonic scintillators which lead to optimal performance and novel functionalities. Important design concepts include the use of absorbing structures inspired by solar cells, angularly-selective structures, and metasurfaces. Scintillators based on conventionally overlooked materials (such as GaAs or GaN) are also disclosed, which are designed to reach efficiencies comparable or superior to state-of-the-art conventional scintillators (such as YAG:Ce and LYSO). Such scintillators provide important enhancement of scintillation yield arising from incorporation of nanophotonic patterns. Additionally, nanophotonic scintillators designed in conjunction with image post processing algorithms (such as deconvolution algorithms, tomographic reconstruction, etc.) are disclosed. These scintillators are designed in order to increase robustness, minimize the required dose / scan time or even the number of scans required in scintillation imaging. These new designs optimize the scintillator for optimal reconstruction.

The present invention discloses a method for preparing an X-ray fluorescent screen and the X-ray fluorescent screen thereof. The preparation method comprises the following steps: S1, pretreatment: cleaning and drying a microchannel structure; the microchannel structure is provided with a plurality of through microchannels, and the microchannel structure is made of glass; S2, microchannel coating: coating the sidewalls of the microchannels with a reflective film; S3, preparing a suspension: mixing fluorescent material particles, a carrier solvent, and a surfactant, and dispersing them to prepare a suspension; S4, filling the microchannels; S5, repeating the filling; S6, post-treatment: cleaning the surface of the microchannel structure and encapsulating it; the X-ray fluorescent screen is prepared using the above preparation method; the X-ray fluorescent screen comprises a microchannel structure, the microchannel structure is provided with a plurality of through microchannels arranged in an array, and the microchannels are filled with fluorescent material particles. The present invention fills the glass microchannel structure with fluorescent material particles to improve the resolution and fluorescence transmission efficiency of the X-ray fluorescent screen.

To improve reliability of a scintillator structure.SOLUTION: A scintillator structure for X-ray detection forming an X-ray detector, includes a resin and a fluorescent substance. The fluorescent substance includes gadolinium oxysulfide. The resin is an epoxy resin including a main agent, a hardener, and a hardening catalyst. The hardener is a phthalic anhydride-based hardener. The resin has an isocyanurate ring in a skeleton, and after radiation of X-ray whose radiation dose is 100 kGy, the whole light transmittance of the resin to light having a wavelength of 542 nm is 80% or more.SELECTED DRAWING: Figure 1

A scintillator panel includes: a first flexible support body having a first surface and a second surface on a side opposite to the first surface; a scintillator layer formed on the first surface and containing a plurality of columnar crystals; a second flexible support body provided on the second surface; an inorganic layer provided on the second flexible support body so as to be interposed between the second surface and the second flexible support body; and a first adhesive layer bonding the second surface and the inorganic layer to each other. A radiation detector includes: the scintillator panel; and a sensor panel including a photoelectric conversion element, in which the scintillator panel is provided on the sensor panel such that the first surface is on the sensor panel side with respect to the second surface.

The invention relates to ultrahigh-concentration cerium ion activated borosilicate scintillation glass rich in Gd2O3, which is prepared from the following raw material components through the processes of sufficient mixing, high-temperature melting, mold casting, precise annealing and the like: 10 to 35 mol percent of B2O3, 10 to 35 mol percent of SiO2, 0 to 70 mol percent of Gd2O3 and 0 to 20 mol percent of CeO2. The sum of the components is 100 mol%. The invention further relates to a preparation method and application of the ultrahigh-concentration cerium ion activated borosilicate scintillation glass rich in Gd2O3. According to the scintillation glass disclosed by the invention, ultrahigh-concentration 5-15mol% doping of CeO2 at a luminescent center in the borosilicate scintillation glass rich in Gd2O3 can be realized, and a relatively high light yield of 1300ph / MeV and scintillation decay time of about 100ns can be obtained while high density is ensured. And on the other hand, the glass has the characteristics of inherent transparency, simple preparation process, easily adjustable components, low cost, large volume and the like, so that the glass has important application value in the fields of nuclear radiation detection, high-energy physical experiments, X-ray medical imaging, neutron detection, industrial online detection, national safety monitoring and the like.

An X-ray imagining film that transforms X-ray radiation into visible light by scintillating, includes a substrate and a nanocomposite formed on the substrate. The nanocomposite includes perovskite nanosheets and plural organic chromophores that interact with the perovskite nanosheets through F—Pb bonds. The perovskite nanosheets are selected to absorb the X-ray radiation and emit first light centered on 510 nm, and the plural organic chromophores are selected to absorb second light between 400 and 600 nm, with a peak at 510 nm, and emit the visible light in 500 to 800 nm range.

To solve such a problem that a scintillator array with less warpage and variations in the outer shape dimension is demanded while the resolution of a diagnostic image of a radiation detector has been increased.SOLUTION: A scintillator array includes: a structure having scintillator segments and a first reflective layer, the first reflective layer surrounding each of the scintillator segments and being provided between the scintillator segments arrayed in the vertical direction of the scintillator segments and between the scintillator segments arrayed in the lateral direction of the scintillator segments and being configured to reflect light; and a layer provided so as to be in contact with the surface of the structure and having a second reflective layer being configured to reflect light. The first reflective layer protrudes from the surface of the structure between the scintillator segments arrayed in the vertical direction and between the scintillator segments arrayed in the lateral direction.SELECTED DRAWING: Figure 1

X-ray scintillators based on amorphous organic metal halide hybrid films are demonstrated, which can be prepared via a facile solution processing with a non-crystalline organic halide salt reacting with metal halide at low temperature. The solution processed scintillators exhibit excellent scintillation properties, thermal stability, mechanical resilience, and processability.

The invention discloses a method for synthesizing CsPbX3 perovskite quantum dots by using a low-temperature polar solvent, which comprises the following steps: 1) preparing a cationic precursor: taking a corresponding required amount of acetate, adding the polar solvent, and taking octanoic acid as a solvent; 2) preparing an anion precursor: taking a polar solvent as a solvent, and adding corresponding halogen acid and oleylamine; and (3) mixing the anion precursor and the cation precursor, adding a certain amount of non-polar solvent during mixing, adding the non-polar solvent during mixing or during preparation of a precursor solution, and stirring and reacting to obtain the perovskite quantum dots, wherein the volume ratio of the non-polar solvent to the polar solvent is 1: 3. The synthetic method has the advantages of high yield, simplicity, low cost and continuous and adjustable light color.

A multi-component rare-earth garnet optical material containing at least three different rare-earth elements and optionally activator ions is described. The optical material includes a rare-earth garnet scintillator. A method for preparing powders, ceramics, and single crystals of the optical material is also described. Further, a radiation detector including a rare-earth garnet scintillator is described.

The present invention provides: a scintillator which is reduced in the intensity of the afterglow, while having increased luminous intensity; and a charged particle radiation apparatus. A scintillator according to the present invention is characterized in that: a base material, a buffer layer, a light emitting part and a first conductive layer are sequentially stacked in this order; the light emitting part contains one or more elements that are selected from the group consisting of Ga, Zn, In, Al, Cd, Mg, Ca and Sr; and a second conductive layer is provided between the base material and the light emitting part.

A ceramic scintillator array 1 according to an embodiment of the present invention is provided with a plurality of scintillator segments 2 and a reflective layer. The reflective layer contains a resin composition. The resin composition contains a transparent resin and an additive. Dibasic acid esters serve as the additive.

Provided is a scintillator panel including a substrate, grid-like barrier ribs formed on the substrate, and a phosphor layer in a cell separated by the barrier ribs, in which the barrier rib includes on its surface in the following order a metallic reflective layer, and an inorganic protective layer mainly containing a nitride.

A scintillator panel includes a support substrate being flexible; a scintillator layer including a plurality of columnar crystals; and an intermediate layer disposed between the support substrate and the scintillator layer. The plurality of columnar crystals include a plurality of first end portions on a support substrate side and a plurality of second end portions on a side opposite to the support substrate. Each of the plurality of first end portions tapers toward the support substrate side. Each of the plurality of second end portions has an end surface along a plane. A part of the intermediate layer is disposed in at least a region between the plurality of first end portions.

An improved scintillator nanocomposite having nanoparticles with scintillating properties and diameters of 10 to 50 nanometers and a first matrix material is obtained by adding the nanoparticles to a dispersion medium to form a stable suspension, the dispersion medium being a precursor to the first matrix material, and the precursor being cured to form the first matrix material.

The invention relates to organic scintillators with improved characteristics in terms of transparency and response speed. More specifically, the scintillators of the invention use the chemical compounds of formula (M), also called fluorophores: (M) wherein: X and Y, independently of each other, are: H, aryl, naphthyl, biphenyl, tolyl, preferably 2-naphthyl, 1-naphthyl, 2-biphenyl, 4-tolyl; with the proviso that X and Y are never H at the same time; R1 and R2, independently of each other, are: aryl, arylalkyl, alkyl (also alkylene), with linear branched or cyclic chain C2-C12, preferably at least one of R1 and R2, or both, is C8H17.

A radiation detector includes: a sensor panel; a scintillator panel; and a resin frame provided across the sensor panel and the scintillator panel, in which the sensor panel has a mounting surface where the scintillator panel is mounted, the scintillator panel includes a support body having a first surface, a second surface on a side opposite to the first surface, and a first side surface connecting the first surface and the second surface to each other, and a scintillator layer formed on the first surface and containing a plurality of columnar crystals, the scintillator panel is mounted on the mounting surface such that the scintillator layer and the first surface face the mounting surface, and the scintillator layer has a second side surface extending so as to be positioned on the same plane as the first side surface.

The primer layer (104) with improved reflectivity and heat insulation properties is provided for use in the microencapsulated thermal imaging sheet (100). The primer layer having a polymer binder, white fine particles in an amount of about 3 to about 60% by weight based on the total weight of the primer layer, a primer substrate (102), and hollow fine particles improves the reflectivity, color development, color density, and heat insulation of the microcapsule (108) imaging sheet containing it. The black backcoat (105) applied to the substrate on the opposite side of the primer layer further enhances the Dmax and E of the microcapsule imaging sheet and prevents premature exposure of the microcapsule imaging sheet in the laminated media. 10 ​

This scintillator unit comprises: a support; a scintillator layer disposed on the support and including a plurality of columnar crystals; an optical functional layer disposed on an effective portion of the scintillator layer; and a moisture-proof layer integrally covering both the scintillator layer and the optical functional layer. The moisture-proof layer is in contact with the plurality of columnar crystals at an outer edge of the scintillator layer and enters gaps of the plurality of columnar crystals.

To improve reliability of a scintillator structure.SOLUTION: A scintillator structure includes a plurality of cells, and a reflection layer covering the plurality of cells. Each of the plurality of cells includes a resin and a phosphor, and the resin has a reduction rate of total light transmittance to light having a wavelength of 542 nm after irradiated with X rays having a dose of 100 kgy of less than 8%.SELECTED DRAWING: None

A photosensitive resin composition film, containing (A) a resin, (B) an epoxy compound and / or an oxetane compound, and (C) a photo-cationic polymerization initiator, wherein a transmittance Tα (%) per unit film thickness at a wavelength of 405 nm on one surface thereof and a transmittance Tβ (%) per unit film thickness at a wavelength of 405 nm on the other surface thereof satisfy formula (1), which is Tα > Tβ, and with respect to the thickness of the photosensitive resin composition film, a content C10 (mass%) of the photo-cationic polymerization initiator (C) at a depth of 10% from the surface on the side where the transmittance per unit film thickness at a wavelength of 405 nm is Tα (%) and a content C90 (mass%) of the photo-cationic polymerization initiator (C) at a depth of 90% from said surface satisfy formula (2) below. Provided is a photosensitive resin composition film capable of forming a high aspect ratio pattern. (2): 0.050 ≤ C10 / C90 ≤ 0.85

A ceramic scintillator according to an embodiment of the present invention is provided with a sintered body of a gadolinium oxysulfide phosphor containing praseodymium as a main activator. When the body color of the sintered body is represented by chromaticity coordinates (x, y) based on a CIE1931 chromaticity value, the sintered body has a body color satisfying the following formulae (1) and (2). A ceramic scintillator according to an embodiment is obtained by a method for producing a ceramic scintillator, the method comprising a heat treatment step for reacting a reactant gas containing oxygen and sulfur with the sintered body. The heat treatment time in the heat treatment step is from 1 hour to 50 hours (inclusive). 0.4 < = x < = 0.505 (1) 0.83 x + 0.075 < = y < = 0.83 x + 0.095 (2).

The scintillator (1A) according to the present invention is characterized by comprising: a supporting substrate (10); a light-emitting layer (14) formed on the substrate (10) and having an electron concentration of 2×10 19 cm ‑3 Above 2×10 20 cm ‑3 The following form is composed of ZnO to which impurities are added and generates scintillation light in response to the incidence of radiation; a protective layer (16) is formed on the light-emitting layer (14) and is composed of a material having a band gap larger than that of ZnO; and a metal layer (18) is formed on the protective layer (16). The supporting substrate (10) is composed of a material that transmits the scintillation light generated on the light-emitting layer (14). In addition, the metal layer (18) functions as a reflection layer that reflects the scintillation light from the light-emitting layer (14). Thus, a scintillator suitable for detecting radiation such as electrons and an electron detector using the scintillator can be realized.

This scintillator panel comprises: a support layer; a scintillator layer disposed on the support layer and including a plurality of columnar crystals; an adhesive layer disposed on the scintillator layer; a release layer disposed on the adhesive layer and having releasability from the adhesive layer; and a first moisture-proof layer integrally covering an outer edge portion of the scintillator layer, an outer edge portion of the adhesive layer, and an outer edge portion of the release layer. Through use of this scintillator panel, the scintillator layer can be attached to another member when the scintillator panel is used, and the moisture-proof properties of the scintillator layer can be sufficiently secured when the scintillator panel is not in use.

The invention discloses a preparation method and a preparation device of a pixelated neutron-sensitive scintillation screen. Relates to the technical field of neutron detection and imaging. Placing the neutron sensitive mixed liquid in a container; the container is connected with a glass capillary tube array through a circulating peristaltic pump, and the glass capillary tube array is used for supporting the pixelated neutron-sensitive scintillation screen and filling the pixelated neutron-sensitive scintillation screen with neutron-sensitive mixed liquid; within the preset first working time, a circulating peristaltic pump is started, the circulating peristaltic pump can suck the neutron-sensitive mixed liquid to flow through the glass capillary tube array in the forward direction, and the circulating peristaltic pump can also suck the neutron-sensitive mixed liquid to flow through the glass capillary tube array in the reverse direction; and after the first working time is up, taking out the glass capillary tube array to obtain the pixelated neutron-sensitive scintillation screen. According to the invention, the problems of time consumption and non-uniformity when the fluorescent powder is manually filled into the glass capillary tube array in the traditional suction filtration method are solved, and the labor cost and the filling time are effectively reduced.

The invention relates to organic scintillators with improved characteristics in terms of transparency and response speed. More specifically, the scintillators of the invention use the chemical compounds of formula (M), also called fluorophores:wherein:X and Y, independently of each other, are: H, aryl, naphthyl, biphenyl, tolyl, preferably 2-naphthyl, 1-naphthyl, 2-biphenyl, 4-tolyl; with the proviso that X and Y are never H at the same time;R1 and R2, independently of each other, are: aryl, arylalkyl, alkyl (also alkylene), with linear branched or cyclic chain C2-C12, preferably at least one of R1 and R2, or both, is C8H17.

Systems, methods, apparatus, and computer program products are provided for the detection of X-ray electromagnetic radiation using a scintillator. [Solution] In one exemplary embodiment, at least one X-ray device may have an X-ray source configured to emit an X-ray cone, a scintillator, a detector, and at least one shroud positioned to block stray light from reaching the detector.

A decrease and variations in dimensional accuracy due to deformation is suppressed.The scintillator array according to an embodiment includes a plurality of scintillator segments each including a sintered body of a rare earth oxysulfide phosphor, a first reflective layer interposed between adjacent scintillator segments so as to integrate the scintillator segments, and a second reflective layer located on a surface side of the scintillator segments on which X-rays are incident. The amount of deformation of the corners of the second reflective layer is 20 μm or smaller.