Results 221 to 230 of about 5,798 (263)
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1994
Abstract : In this final report, we present the infrared spectrum of a laser produced oxygen plasma. We have focused on extending the spectral range of observation of Ol Rydberg emissions to 13 micrometers. We report the first observations of OI Rydberg line emission in the 8-13 micrometer wavelength region.
R. A. Armstrong +2 more
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Abstract : In this final report, we present the infrared spectrum of a laser produced oxygen plasma. We have focused on extending the spectral range of observation of Ol Rydberg emissions to 13 micrometers. We report the first observations of OI Rydberg line emission in the 8-13 micrometer wavelength region.
R. A. Armstrong +2 more
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Infrared Emission Spectroscopy
SPIE Proceedings, 1989This paper gives the complete theoretical description of emission spectroscopy. The approach, based on Einstein's derivation of the emission of a perfect black body, has been adopted. The strict general result has been obtained. An approximate result from the emittance of real samples is derived and applied to the the case of a thin film and an ...
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Circumstellar Infrared Emission
1973Infrared astronomy has in the past decade emerged from being a part-time occupation of a few astronomers. Three major subdivisions of research have become apparent, solar system, galactic and extragalactic studies. In each of these fields infrared studies have made unique contributions.
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Infrared Emission From Interstellar Plasma
Astrophysics and Space Science, 1988Small dust grains in hot interstellar plasmas are heated by electrons and emit near-infrared radiation. Its flux is estimated to be larger than that from small dust grains heated by stellar radiation and could explain the high infrared flux observed at wavelengths of about 5 µm.
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2016
Emission of a flat layer, consisting of a gas with a weakly varied temperature in the perpendicular direction to the layer, is reduced to the case of the layer with a constant temperature. The average optical thickness of the Earth’s atmosphere in an infrared spectrum range is \(u\approx 2.7\) and is determined on the basis of the energetic balance of ...
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Emission of a flat layer, consisting of a gas with a weakly varied temperature in the perpendicular direction to the layer, is reduced to the case of the layer with a constant temperature. The average optical thickness of the Earth’s atmosphere in an infrared spectrum range is \(u\approx 2.7\) and is determined on the basis of the energetic balance of ...
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Infrared Electronic Emission Spectrum of Nitrogen
Applied Optics, 1970The ir emission spectrum of nitrogen from 1 micro to 5 micro wavelength, arising from transitions between excited electronic states of the molecule and the atom, is presented and discussed. This investigation was undertaken to survey the near ir for possible auroral emission features and to extend the electronic emission spectrum of the common ...
K A, Saum, W M, Benesch
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Infrared Electronic Emission Spectrum of Oxygen
Applied Optics, 1970The emission spectrum of the positive column of an electric discharge in flowing oxygen has been investigated in the near ir, from 1-micro to 5-micro wavelength. Spectra over a range of pressures from 0.5 Torr to 10 Torr are displayed, and thirteen previously unreported lines of OI measured and assigned.
K A, Saum, W M, Benesch
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Near-infrared-emissive metal–organic frameworks
Dalton Transactions, 2019We describe the recent progress in near-infrared-emissive metal–organic frameworks, and especially highlight their appealing applications in bio-imaging, sensing and barcoding.
Danna Zou +3 more
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1988
This introductory tutorial contribution covers infrared emission processes involving dust grains in star forming regions. These grains produce emission, absorption, reddening, scattering, and polarisation effects which are described. The optics of dust grains are outlined together with current ideas about how these are determined by the composition ...
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This introductory tutorial contribution covers infrared emission processes involving dust grains in star forming regions. These grains produce emission, absorption, reddening, scattering, and polarisation effects which are described. The optics of dust grains are outlined together with current ideas about how these are determined by the composition ...
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Infrared emission computed tomography
Annual Meeting Optical Society of America, 1985The problem of deducing the temperature profile of a weakly inhomogeneous, incoherent radiating object from external field measurements is addressed within the framework of classical second-order scalar coherence theory. Within this framework it is shown that the problem can be cast into an inverse radiometric problem using the concepts of generalized ...
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