A phosphor-containing member includes a transparent member, and a plurality of granular single crystal phosphors dispersed in the transparent member. Each of the plurality of granular single crystal phosphors includes a YAG crystal as a mother crystal. The plurality of granular single crystal phosphors are prepared by crushing the YAG crystal. The YAG crystal has a composition represented by a formula of Y.sub.3-x-yGd.sub.xCe.sub.yAl.sub.5O.sub.12-w (0.03x0.2, 0.003y0.2, 0.2w0.2). Reduction of fluorescence intensity of the phosphors is less than 3% when an excitation light wavelength is 460 nm and a temperature is increased from 25 C. to 100 C.

A method of fabricating a turbine engine part, the method including fabricating an ingot out of ceramic material of eutectic composition by performing the Czochralski process including putting a seed of the ingot that is to be obtained into contact with a molten bath of a mixture of eutectic composition in order to initiate the formation of the ingot on the seed, the mixture including at least two ceramic compounds; drawing the ingot from the molten bath while imposing on the ingot that is being formed a drawing speed less than or equal to 10 mm/h together with rotation at a speed of rotation less than or equal to 50 rpm; and machining the ingot as fabricated in this way in order to obtain the turbine engine part.

A method of fabricating a turbine engine part, the method including fabricating an ingot out of ceramic material of eutectic composition by performing the Czochralski process including putting a seed of the ingot that is to be obtained into contact with a molten bath of a mixture of eutectic composition in order to initiate the formation of the ingot on the seed, the mixture including at least two ceramic compounds; drawing the ingot from the molten bath while imposing on the ingot that is being formed a drawing speed less than or equal to 10 mm/h together with rotation at a speed of rotation less than or equal to 50 rpm; and machining the ingot as fabricated in this way in order to obtain the turbine engine part.

The present invention discloses single crystal based phoswich detector for discriminating various kinds of radiations. The invented phoswich detector comprises a single crystal based scintillator having at least a pair of single crystals with identical refractive indices and different scintillation kinetics and a photo-sensor coupled to the single crystal based scintillator to detect a scintillation light pulse generated through interaction of radiation elements with the pair of the single crystals for discrimination of different kinds of radiation elements based on a dissimilarity in the scintillation light pulse shapes generated through the interactions.

The present invention discloses single crystal based phoswich detector for discriminating various kinds of radiations. The invented phoswich detector comprises a single crystal based scintillator having at least a pair of single crystals with identical refractive indices and different scintillation kinetics and a photo-sensor coupled to the single crystal based scintillator to detect a scintillation light pulse generated through interaction of radiation elements with the pair of the single crystals for discrimination of different kinds of radiation elements based on a dissimilarity in the scintillation light pulse shapes generated through the interactions.

As one of purposes, the present invention provides: a single-crystal phosphor which can exhibit excellent properties under high-temperature conditions; and a light-emitting device in which the phosphor is used. As one embodiment, a single-crystal phosphor is provided, which has a chemical composition represented by the compositional formula:

Y.sub.1-x-y-zLu.sub.xGd.sub.yCe.sub.z).sub.3+aAl.sub.5-aO.sub.12(0x0.9994, 0y0.0669, 0.0002z0.0067,0.016a0.315).

A phosphor-containing member includes a transparent member, and particles of a single crystal phosphor dispersed in the transparent member. The single crystal phosphor has a composition represented by a compositional formula (Y.sub.1abLu.sub.aCe.sub.b).sub.3+cAl.sub.5cO.sub.12 (where 0a0.9994, 0.0002b0.0067, 0.016c0.315), and Commission International de l'Eclairage (CIE) chromaticity coordinates x, y of an emission spectrum satisfy a relationship of 0.4377x+0.7384y0.4377x+0.7504 when a peak wavelength of excitation light is 450 nm and temperature is 25 C.

A phosphor-containing member includes a transparent member, and particles of a single crystal phosphor dispersed in the transparent member. The single crystal phosphor has a composition represented by a compositional formula (Y.sub.1abLu.sub.aCe.sub.b).sub.3+cAl.sub.5cO.sub.12 (where 0a0.9994, 0.0002b0.0067, 0.016c0.315), and Commission International de l'Eclairage (CIE) chromaticity coordinates x, y of an emission spectrum satisfy a relationship of 0.4377x+0.7384y0.4377x+0.7504 when a peak wavelength of excitation light is 450 nm and temperature is 25 C.

A light emitting device includes a laser diode that emits a blue light, and a wavelength conversion part that absorbs a part of light emitted from the laser diode and converts a wavelength thereof. The wavelength conversion part includes a YAG-based single crystal phosphor. Irradiance of light emitted from the laser diode and irradiated on the wavelength conversion part is not less than 80 W/mm.sup.2.

A light emitting device includes a laser diode that emits a blue light, and a wavelength conversion part that absorbs a part of light emitted from the laser diode and converts a wavelength thereof. The wavelength conversion part includes a YAG-based single crystal phosphor. Irradiance of light emitted from the laser diode and irradiated on the wavelength conversion part is not less than 80 W/mm.sup.2.