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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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We report the first observation of UV luminescence from gaseous C(sub 60)(sup +) and C(sub 70)(sup +) buckminsterfullerenes. The emission features appear in the 275 to 340 nm wavelength region and originate from radiative decay of the excited ionic species.
It has been recently shown that the high luminescence intensity from a Cr-doped GdAlO3 (Cr:GdAlO3) thermographic phosphor enables non-rastered full-field temperature mapping of thermal barrier coating (TBC) surfaces to temperatures above 1000C. In this presentation, temperature mapping by Cr:GdAlO3 based phosphor thermometry of air film-cooled TBC-coated surfaces is demonstrated for both scaled-up cooling hole geometries as well as for actual components in a burner rig test environment. The effects of thermal background radiation and flame chemiluminescence on the measurements are investigated, and advantages of this method over infrared thermography as well as the limitations of this method for studying air film cooling are discussed.
Rarefied gas dynamics - electron beam density, temperature probe and examination of electro- luminescence spectra
Rocketborne spectroradiometer measurement of the spectral radiation intensity of luminescent air in the shock induced flow field produced by a reentry vehicle
Rocketborne spectroradiometer measurement of spectral radiation intensity of luminescent air in shock induced flow field produced by reentry vehicle
Glow curves, and spectral distribution of luminescence in synthetic quartz containing aluminum impurity
Ultraviolet solid state spectroscopy by low vacuum reflectometer - reflection spectra, and excitation luminescence of alkali halides
Quantitative data on photometric, luminescence, light polarization, color, infrared temperature, and microwave temperature properties of moon
Effects of recoil in semiconductor with thermal- neutron-absorption cross section, measuring changes in luminescence and conductive properties of CdS
Silver improves luminescence and reduces contamination of zinc sulfide phosphors. The silver is added after the zinc sulfide phosphors are deposited in thin films by vapor evaporation, but before calcining, by immersion in a solution of silver salt.
Improved electrical circuit determines the amount of light detected by a photomultiplier tube when its output signal is in the dark-current range of the tube. The low-intensity light to which the tube responds arises from a thermo-luminescent ionized dosimeter.
Dark conductivity, photoconductivity, and luminescence of cadmium sulfide crystals heat treated in sulfur or cadmium vapors
Recombination luminescence of irradiated silicon, and hole-optical phonon interaction in degenerate silicon
Lunar luminescence factor in photometry of lunar surface calculated from angles of incidence, phase, and reflection
Luminescence and radiation sources of night sky emissions
Channel electron multipliers for cathode luminescent collection of topographic details
Spatial distribution and emission intensity of luminescent patches in airglow
UV irradiation effects on ZnO spacecraft thermal control coating pigments, discussing photo-Hall, luminescence and electron paramagnetic resonance measurements