79 results about "Caesium iodide" patented technology

A container inspection equipment with cobalt-60 γ-ray source and cesium iodide or cadmium tungstate detector includes a cobalt-60 γ-ray source, a cask, a front collimator, a rear collimator, a cesium iodide or cadmium tungstate detector, signal and image processing systems, container trailer system, and automatic control system. The cask of the cobalt-60 γ-ray source, the beam shutter, and the front collimator are fixed on the same chassis to form an integration and placed in the source room. The rear collimator, cesium iodide or cadmium tungstate array detector and the radiation catcher are fixed on the same chassis to form an integration and placed in the detector room. A container inspection tunnel is formed between the source room and the detector room. The equipment is mainly used for inspecting smuggling goods and contrabands etc., in large containers, container trucks, train carriage and air containers. The equipment either can be installed in the sea port and land frontier customs or installed at the air port, vital communication line, and railway station.

This invention discloses a solution based synthesis of cesium tin tri-iodide (CsSnI3). More specifically, the CsSnI3 is fabricated in an organic Perovskite precursor solvent. CsSnI3 are ideally suited for a wide range of applications such as light emitting and photovoltaic devices.

It is desirable to achieve a co-incident investigative kV source for a therapeutic MV source—a so-called “beams-eye-view” source. It has been suggested that bremsstrahlung radiation from an electron window be employed; we propose a practical structure for achieving this which can switch easily between a therapeutic beam and a beam-eye-view diagnostic beam capable of offering good image resolution. Such a radiation source comprises an electron gun, a pair of targets locatable in the path of a beam produced by the electron gun, one target of the pair being of a material with a lower atomic number than the other, and an electron absorber insertable into and withdrawable from the path of the beam. In a preferred form, the electron gun is within a vacuum chamber, and the pair of targets are located at a boundary of the vacuum chamber. The lower atomic number target can be Nickel and the higher atomic number target Copper and / or Tungsten. The electron absorber can be Carbon, and can be located within the primary collimator, or within one of a plurality of primary collimators interchangeably locatable in the path of the beam. Such a radiation source can be included within a radiotherapy apparatus, to which the present invention further relates. A flat panel imaging device for this source can be optimised for low energy x-rays rather than high energy; Caesium Iodide-based panels are therefore suitable.

A monocoque-structured housing accommodates a photoelectric conversion panel, a scintillator, and a circuit board in this order from an X-ray incidence side. The scintillator contains cesium iodide and converts X-rays into visible light. The scintillator is vapor-deposited on the photoelectric conversion panel. A plurality of pixels that photoelectrically convert the visible light into charges are formed in the photoelectric conversion panel. A signal processor, which reads out the charge from each pixel and generates image data, is mounted on the circuit board. A gap layer is formed between the scintillator and the circuit board.

The invention discloses a thallium-doped caesium iodide scintillator and an application thereof; the thallium-doped caesium iodide scintillator is thallium-ytterbium co-doped cesium iodide and has the following composition general formula: (Cs1-x-yTlxYby)(I1-yM2y) or (Cs1-x-yTlxYby)(I1-yM3y), wherein M is I, Br, Cl or F, 0<x<=0.05, and 0<y<=0.05. A thallium-doped caesium iodide thin film and a single-crystal fiber prepared by the thallium-doped caesium iodide scintillator have excellent properties of high scintillation efficiency and low afterglow, and can be widely applied in the field of X-ray radiation imaging.

The invention discloses a preparation method of a metal oxide SnO2 and halide perovskite quantum dot Cs3Bi2I9 heterojunction visible-light-driven photocatalyst, which comprises the following steps of (1) preparing a tin tetrachloride pentahydrate solution and a sodium hydroxide solution, dropwise adding the sodium hydroxide solution into the tin tetrachloride pentahydrate solution, stirring, dropwise adding absolute ethyl alcohol, stirring, heating, reacting, then washing, drying and grinding, (2) adding cesium iodide and bismuth iodide into N, N-dimethylformamide, and performing ultrasonic treatment to obtain a precursor solution, then adding the solution into toluene for reaction, and then centrifuging, drying and grinding, and (3) adding the two kinds of powder into isopropanol liquid for ultrasonic treatment, then stirring and centrifuging, drying and grinding to obtain the heterojunction visible-light-driven photocatalyst. The method for preparing the heterojunction photocatalyst is easy to operate, mild in reaction condition, low in equipment requirement and free of a complex synthesis device, and the catalyst is applied to nitrogen oxide degradation and can remarkably improve the nitrogen oxide removal efficiency.