摘要:
This invention provides phosphor-doped fluoroperovskite compounds that are capable of storing at least part of the energy of incident ionizing radiation and releasing at least part of the stored energy upon optical stimulation or heating. Also provided are dosimeters and radiation storage devices comprising the compounds, methods of preparing the compounds, and methods of using the compounds to determine a dose of ionizing radiation or to record and reproduce an ionizing radiation image.
摘要:
A fluorescent film including a base material constituted of a UV-permeable fluoride, and an activator doped in the base material, wherein the activator contains a transition element or a rare earth element and emits fluorescent light in the base material when ultraviolet light is irradiated to the base material. Also disclosed are a multilayer dielectric film including the fluorescent film, and an optical element, an imaging unit, an optical property measuring apparatus, an exposure apparatus, an exposure method, and a device manufacturing method utilizing the fluorescent film.
摘要:
The invention is directed to a composition having a carrier matrix, and a particulate luminescent composition dispersed therein, the particulate luminescent composition comprising a rare-earth-doped alkaline earth fluoride represented by the formula RExA1−xF2+x−2yOy wherein RE represents a three-valent rare-earth element, A is alkaline earth, 0.002≦x≦0.20, and 0≦y≦x; the particulate luminescent composition exhibiting a luminescence spectrum having a plurality of intensity peaks at characteristic wavelengths. It is further directed to a process by contacting a surface with the composition and articles made therefrom.
摘要:
A light emitting device comprising a light producing element configured to generate ultraviolet light having a wavelength of from about 250 nm to about 400 nm and a self-activating phosphor comprising an ordered oxyfluoride compound is provided. The nitrogen-free or nitrogen-containing ordered oxyfluoride compound has a formula: A3-3a/2RaMO4-δ1-w′F1-δ2-w—Nw where A is Sr alone or Sr mixed with Ba and/or Ca such that A comprises at least about ⅔ mole % of Sr and up to about ⅓ mole percent of Ba and/or Ca; R is a rare earth element or a mixture of rare earth elements; M is Al, Ga, In, W, Mo, Bi, or mixtures thereof; 0
摘要:
Disclosed are a rare earth element-activated, alkaline earth metal fluorohalide based stimulable phosphor capable of producing high-quality images having a very high sharpness and exhibiting high sensitivity and erasure characteristics when used in radiographic image recording and reproduction, a process for preparing the phosphor, an apparatus for the preparation thereof, and a radiographic image conversion panel using the phosphor. More specifically, disclosed are a rare earth element-activated, alkaline earth metal fluorohalide based stimulable phosphor which is represented by the basic compositional formula: Ba1−x MIIx FX: yMI, zLn [wherein MII represents an alkaline earth metal; MI represents an alkaline metal; Ln represents a rare earth element; and x, y, and z represent numerals within the respective ranges of 0≦x≦0.5, 0≦y≦0.05, and 0
摘要:
A fluoride-based fluorescent material designated by a composition formula of MFn:R, wherein M is at least one element selected from the group consisting of rare earth elements, Al and Bi, alkaline earth metals, and alkaline metals, and R is a rare-earth-based activator including at least either Tb or Tb and Ce and nnull1, 2 or 3. The fluoride-based fluorescent materials efficiently emit white-light of a luminescent peak at 543 nm.
摘要:
A stabilized storage phosphor is disclosed intended to be exposed to X-radiation and subsequently stimulated to emit light is disclosed. The storage phosphor is the product of firing a combination of species characterized by the relationship:MFX.sub.1-z I.sub.z.uM.sup.a X.sup.a :yA:eQ:tDwherein M is an alkaline earth; X is selected from the group consisting of Cl and Br; M.sup.a is an alkali; X.sup.a is a halide; A is selected from the rare earths Eu, Ce, Sm and Tb; Q is selected from among metal oxides; D is selected from elements 23 to 28 of the periodic table; z is from 1.times.10.sup.-4 to 1; u is from 0 to 1; y is from 1.times.10.sup.-4 to 0.1; e is from 0 to 1; and t is from 0 to 10.sup.-2. The storage phosphor is stabilized against decline of photostimulated luminescence intensities by the inclusion of a monocyclic compound having a molecular weight of less than 350, exhibiting both acid and base dissociation constants of less than 10.sup.-5 at 25.degree. C. and containing the following ring atoms: ##STR1## where N.sup.T represents a tertiary amine nitrogen atom, C.sup.1/2 represents primary or secondary carbon atom, O represents an oxy linkage, and Z represents a linking group providing two ring carbon atoms to complete a five-membered ring, An oxysulfur reducing can be employed in combination. The stabilized storage phosphor is useful in storage phosphor screens used to record imagewise exposures to X-radiation.
摘要:
A radiographic phosphor panel having an organolead reducing agent. The phosphor panel has a support and a luminescent layer overlaying the support. The luminescent layer can include phosphor crystals, binder and organolead reducing agent. The organolead reducing agent has a concentration sufficient to substantially increase the photostimulated luminescence of the panel.
摘要:
A method, a storage phosphor prepared by the method, and a storage panel. In the method, a precursor mixture is fired, at a temperature between 700.degree. C. and the melting point of the phosphor, to produce an intermediate product. The precursor mixture comprises a combination of species characterized by the relationship:MFX.sub.1-x I.sub.z.uM.sup.a X.sup.a :yA:eQwherein M is selected from Mg, Ca, Sr and Ba; X is selected from Cl and Br; M.sup.a is selected from Na, K, Rb and Cs; X.sup.a is selected from F, Cl, Br and I; A is selected from Eu, Ce, Sm, and Tb; Q is metal oxide; and 0
摘要:
The invention is directed to a process of combining an aqueous solution of a fluoride with an aqueous solution of a host multi-valent metal salt and an aqueous solution of a salt forming a reactant mixture resulting in a precipitate of aqueously insoluble rare-earth doped multi-valent metal fluoride nanoparticles.