125results about "X-ray/infra-red processes" 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

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

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.

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.

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.

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 ​

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 photographic film is formed by combining panchromatic black and white emulsion with a color filter array to produce a full color image using only black and white film and processing.

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.

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.

This enables higher resolution and higher sensitivity in X-ray line sensors. [Solution] A scintillator array 1 is composed of a plurality of scintillator pixels 2 that convert X-rays into light, wherein the plurality of scintillator pixels 2 are arranged in a straight line by partition walls 3 at equal intervals, and the widths of the first side walls 4 and the second side walls 5 at both ends are different, and when two scintillator arrays 1 are placed on top of each other in opposite directions, the scintillator pixels 2 of one scintillator array 1 and the scintillator pixels 2 of the other scintillator array 1 are offset by half a pixel.

Embodiments of the present application disclose a single-atom manipulation system, a control method and an electronic device. The single-atom manipulation system comprises: an atomic cooling device configured to form an MOT atomic group, wherein the MOT atomic group is capable of generating atomic fluorescence of a first target wavelength; an atomic trapping device, wherein the atomic trapping device comprises a laser source and a strong focusing lens, the laser source emits a target laser beam of a second target wavelength, the target laser beam passes through the strong focusing lens to form an optical tweezer array to trap the MOT atomic group; and an imaging device, wherein the imaging device is sequentially provided with a filter, a noise fluorescence shielding device, a plano-convex lens and an imaging unit in a reflection direction of the focused atomic fluorescence, and the noise fluorescence shielding device is configured to shield noise fluorescence generated by the atomic cooling device.

A scintillator panel comprises a substrate, lattice-shaped partitions formed on the substrate, a phosphor layer within cells partitioned by the partitions, and a reflective layer surrounding the side surfaces and bottom of the phosphor layer. The scintillator panel comprises a curved portion of the reflective layer surrounding the side surfaces of the phosphor layer, and portions of the reflective layer on the side surfaces of the phosphor layer having opposing surfaces that are substantially parallel to each other. The ratio of the curved portion to the flat portion of the reflective layer on the bottom of the phosphor layer in the width direction is 10.0:0 to 1.0:9.0. The scintillator panel improves brightness.

To provide a radiation detection material that can achieve both excellent humidity resistance and high spatial resolution, and a method for forming the same.SOLUTION: A radiation detection material comprises a phosphor that has an aggregate 111 of columnar crystals 101, and a protective coat 104 that is formed on the phosphor. The protective coat 104 continuously covers the entire area of a crystal separation area 103 of the phosphor, and partially covers an initial layer area 102 of the phosphor.SELECTED DRAWING: Figure 1

A scintillator unit that can reduce crosstalk when the scintillator unit includes a plurality of scintillators and a radiation detector are provided. More specifically, a scintillator unit includes a reflective layer between a plurality of scintillators and the plurality of scintillators, wherein an adhesive layer and a low-refractive-index layer with a lower refractive index than the adhesive layer are located in this order on the scintillators between the scintillators and the reflective layer.

The present application relates to an ultra-high concentration cerium ion-activated Gd2O3-rich borosilicate scintillating glass. The glass is prepared from the following raw materials through thorough mixing, high-temperature melting, mold casting, and precision annealing, including the following: 10-35 mol% B2O3, 10-35 mol% SiO2, 0-70 mol% Gd2O3, and 0-20 mol% CeO2; the sum of these components is 100 mol%. The present application also relates to a preparation method and application of the ultra-high concentration cerium ion-activated Gd2O3-rich borosilicate scintillating glass. The scintillating glass of the present application can achieve an ultra-high concentration of 5-15 mol% doping of CeO2, the luminescent center, in the Gd2O3-rich borosilicate scintillating glass. While ensuring high density, it can also achieve a high light yield of 1300 ph / MeV and a scintillation decay time of approximately 100 ns. On the other hand, due to the inherent transparency of glass, simple preparation process, easy adjustment of components, and the ability to achieve low cost and large volume, it has important application value in nuclear radiation detection, high-energy physics experiments, X-ray medical imaging, neutron detection, industrial online detection, and national security monitoring.

The present invention improves the reliability of a scintillator structure. This scintillator structure comprises multiple cells and a reflective layer covering the multiple cells. The reflective layer comprises a resin and reflective particles. The resin is a polyolefin without double bonds.

Provided is a scintillator panel with reduced deterioration in brightness due to irradiation and higher brightness. A scintillator panel including a substrate and a scintillator layer containing phosphors, in which the scintillator layer includes a binder resin having a π-conjugated structure composed of seven or more atoms; in which the glass transition temperature of the binder resin is from 30 to 430°C; and the thickness of the scintillator layer is from 50 to 800 µm.

The invention relates to a method for producing a supported scintillator for particle radiation, and to a supported scintillator. The supported scintillator comprises, as a substrate, a plastics film and a layer of scintillator powder which is adhesively bonded to the substrate. In the method according to the invention, the scintillator powder is applied in excess to an adhesive layer on the plastics film while the plastics film is caused to vibrate with vibrations at ultrasonic frequency. The scintillator powder is then pressed on, after which non-adhering scintillator powder is removed. The supported scintillator has a transmission of τ ≥ 0.99.

This scintillator comprises: a support substrate; and a light-emitting layer that is formed from ZnO, is disposed on the support substrate, and emits light in response to the incidence of charged particles or photons. The light-emitting layer has a plurality of first layers having a first impurity concentration, and a plurality of second layers alternately laminated with the plurality of first layers and having a second impurity concentration lower than the first impurity concentration.