摘要:
Scintillator compositions having a garnet crystal structure useful for the detection of high-energy radiation, such as X, &bgr;, and &ggr; radiation, contain (1) at least one of terbium and lutetium; (2) at least one rare earth metal; and (3) at least one of Al, Ga, and In. Terbium or lutetium may be partially substituted with Y, La, Gd, and Yb. In particular, the scintillator composition contains both terbium and lutetium. The scintillators are characterized by high light output, reduced afterglow, short decay time, and high X-ray stopping power.
摘要:
A rare earth fluoride phosphor favorably employable for the incorporation into a radiographic intensifying screen has the following formula (I) or (II): (Gd1−xLnx)F3·aMX (I) LnF3·aMX:yA (II) in which Ln is Y, La or Lu; M is Na, K, Cs or Rb; X is F, Cl, Br or I; A is Ce, Tb or Bi; and a, x and y numbers satisfying the conditions of 0
摘要:
The invention provides compositions and molded, extruded or formed phosphorescent plastic articles produced therefrom that contain non-radioactive, non-sulfide phosphorescent phosphor pigments that emit light in the visible spectrum, preferably metal oxide aluminate:europium-activated phosphorescent phosphor pigments, preferably in combination with polymer-soluble daylight fluorescent dyes, in transparent or translucent resins. The plastic articles produced from the compositions of the invention exhibit a remarkably rich, attractive, clear, brilliant fluorescent daylight color and a strong, long-lasting glow-in-the-dark luminescence having a color similar to that of the daylight color.
摘要:
A phosphor powder is composed of a host material made of an element coming under the group II of the periodic table and an element coming under the group VI of the periodic table, an activator and a co-activator, the amount ratio of the activator to the host material is 1×10−4 to 1×10−3 parts by weight when the amount ratio of the host material is 1 part by weight, and the co-activator has a molar concentration equal to a molar concentration of the activator.
摘要:
The invention aims to provide a phosphor multilayer eliminating a need for filters, having a satisfactory color purity and useful in white monochromatic EL devices, and an EL panel. Such objects are achieved by a phosphor multilayer comprising at least a first thin film and a second thin film wherein the first thin film is formed of a matrix material comprising barium aluminate as a main component, containing sulfur element and further containing Eu as a luminescent center, and the second thin film is formed of a matrix material comprising zinc sulfide as a main component, and an EL panel using the same.
摘要:
A transparent scintillator material for rapid conversion of exciting radiation, such as x-rays, to scintillating radiation. The scintillator material has a cubic garnet host, and has praseodymium as an activator. The scintillator material may be a polycrystalline ceramic material. The polycrystalline ceramic is formed by sintering a powder formed by precipitation. The scintillator material may be integrated into computed tomography (CT) equipment or other x-ray imaging equipment. The scintillator material may also be integrated into a fast response x-ray detector system.
摘要:
Phosphor powders and a method for making phosphor powders. The powders are oxygen-containing, such as metal oxides, silicates, borates or titanates and have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention advantageously permits the continuous production of such powders. The invention also relates to improved devices, such as display devices, incorporating the phosphor powders.
摘要:
The present invention provides terbium or lutetium garnet x ray scintillators activated with a rare earth metal ion, such as cerium, and treated by annealing in a controlled atmosphere comprising a predetermined amount of oxygen for a predetermined time and temperature to reduce radiation damage that would otherwise occur when the scintillator material is exposed to high energy radiation, such as the type of radiation required to use the scintillator for medical radiographic imaging and the like. In an embodiment, a single crystal or a polycrystalline scintillator comprising the general formula (Tb1−xLuxCey)3Al5O12 (where 0
摘要:
A mixed green color fluorescent material for an electric device such as a plasma display panel includes: at least a first fluorescent material selected from a Group A defined in a range (0.10≦x≦0.18, 0.70≦y≦0.80) on a chromaticity coordinate; and at least a second fluorescent material selected from a Group B defined in a range (0.25≦x≦0.35, 0.55 ≦y≦0.65) on the chromaticity coordinate.
摘要:
A vacuum ultraviolet ray-excited light-emitting phosphor comprising a compound represented by formula (BaxM1−x)1−0.25yMg1−yAl10+yO17+0.25y as a substrate, and Eu as an activator, wherein M represents Ca, Sr, or Ca and Sr, x and y satisfy the following relations, 0.5≦x≦1, and 0.05≦y≦0.15.
摘要翻译:包含式(BaxM1-x)1-0.25yMg1-yAl10 + yO17 + 0.25y作为底物的化合物和Eu作为活化剂的真空紫外线激发发光荧光体,其中M表示Ca,Sr或 Ca和Sr,x和y满足以下关系:0.5 <= x <= 1,0.05 <= y <0.15。