Hubble Space Telescope Faint Object Spectrograph (HST FOS) observations have shown that the spectrum
NASA Technical Reports Server (NTRS)
Quasar absorption lines in flat universes with nonzero cosmological constant Lambda are examined and
... Accession Number : AD0619963. Title : INVESTIGATION OF NARROW LINE ABSORPTIONS IN SINGLE CRYSTAL CALCITE. ...
DTIC Science & Technology
... Title : ABSORPTION LINE SERIES AND AUTOIONIZATION RESONANCE STRUCTURE ANALYSIS IN THE ULTRAVIOLET SPECTRUM OF SR I,. ...
Nov 1, 1977 ... This atlas of infrared absorption line contains absorption line parameters (line strength vs.
NASA Website
The optical absorption lines of quasars are examined, and implications of the lines for the physical
quasar's broad emission lines. The reddest extent of the broad-line absorption .... lines from the quasar and the low signal-to-noise ...
... Descriptors : (*VAPOR PRESSURE, RESONANCE ABSORPTION), (*COPPER, LINE SPECTRA), ABSORPTION SPECTRA, SPECTROSCOPY ...
... Title : Calculation of Molecular Absorption Parameters and Updating the AFGL atmospheric Line Parameter Compilation. ...
... Title : Resonance Line Absorption Method for Determination of Nitric Oxide Concentration. Descriptive Note : Final rept.,. ...
Dec 18, 1998 ... Absorption lines are discrete colors of light that are absorbed by intervening matter; this absorption leaves holes or "lines" in the ...
In the ultraviolet spectra of hot stars, absorption lines can be seen from highly ionized species in
The strongest and generally most useful optical interstellar absorption lines include the D lines of
We propose to study the theory of broad line regions in AGN.We will focus on assessing the role of radiation driven disk winds in producingboth emission and absorption lines. Four key factors motivate our study:{1} the importance of broad lines in AGN spectra and in AGN physics, {2} the wealth ...
NASA Astrophysics Data System (ADS)
Wavelength accuracy and stability are key requirements for differential absorption lidar (DIAL). We present a control and timing design for the dual-stabilized cw master lasers in a pulsed master-oscillator power-amplifier configuration, which forms a robust low-cost water-vapor DIAL transmitter system. This design operates at 823 nm for water-vapor ...
PubMed
... Title : INVESTIGATION OF NARROW LINE PARAMAGNETIC RESONANCE ABSORPTION SPECTRUM IN SINGLE CRYSTAL CALCITE,. ...
... Title : INVESTIGATION OF NARROW LINE PARAMAGNETIC RESONANCE ABSORPTION SPECTRUM IN SINGLE CRYSTAL CALCITE. ...
... Title : AN INVESTIGATION OF THE EFFECT OF MULTIPLE ABSORPTION AND EMISSION OF RESONANCE-LINE PHOTONS ON LINE SHAPE ...
The stronger resonant X-ray lines from the intracluster gas should be observable as absorption lines
This webpage from the University of California, Riverside offers an explanation of emission and absorption lines. A diagram, with descriptive text, shows how light from a star can produce each type of line. Also, an image of solar absorption lines is provided.
NSDL National Science Digital Library
A high-performance airborne water vapor differential absorption lidar has been developed during the past years. This system uses a four-wavelength/three-absorption line measurement scheme in the 935 nm H2O absorption band to cover the whole troposphere and lower stratosphere simultaneously. Additional high spectral ...
... The results are com pared with measurements by Tomiser on the line widths of the sodium D-line at various tempera tures and pressures. ...
... MOLECULAR ROTATION, ABSORPTION SPECTRA, SPECTRUM ANALYZERS, SPECTRAL LINES, COLLISION BROADENING, LINE SCANNING ...
The effective level of line formation for spectroscopic absorption lines has long been regarded as a
-phonon coupling (EPC) is a key magnitude in carbon materials like graphite or nanotubes, with important and transport measurements. At the transition from few-layer to single-layer graphene flakes, the G line in the flake possibly related to doping variations leading to the shift [2,3]. Additionally we report
E-print Network
(2000) (see Section 2), the retrieval uncertainty of aerosol absorption ... 2001 ), desert dust absorption of solar radiation is very weak for wavelengths ...
... Title : The Reverberation and Absorption Characteristics of a Water-Filled Chamber with and without a Pressure-Release Wall Lining. ...
Red shift relationship with ionization potential for absorption lines in quasi-stellar object 3C 191
... Title : Microwave and Infrared Absorption Properties of Atmospheric Species with Special Emphasis on Line Widths and Shifts. ...
... Title : MEASUREMENT OF WEAK IR ABSORPTION WITH A TUNABLE LASER: THE HYDROGEN S SUB 2(1) LINE STRENGTH, IN: APPLIED ...
... INVESTIGATION OF IMPACT LOAD ABSORPTION THROUGH SUSPENSION LINE ELONGATION ... 23 Figure 3. Static Elongation Tests ..... ...
... A summary is presented of new calculations of atmospheric absorption line parameters and of a slant-path absorption model (SLAM) intended for ...
A cyclotron absorption line as used in pulsar spectra. See Mihara et al., Nature , 1990 or ... cyclotron energy par3= Wf width of the fundamental par4= D2h ...
Calculation was made of the line profiles to be expected when a Fabry-Perot interferometer is used to measure absorption lines. It is shown that large errors may be introduced in the measurement of the integrated absorption, even when an interferometer of...
National Technical Information Service (NTIS)
Five sharp lines in the optical absorption spectrum of antiferromagnetic Cr2O3 are investigated, and the assignments of four of the lines as Frenkel exciton absorptions are discussed in detail. A previous exciton assignment of these lines is shown to be i...
Cool star winds can best be observed in resonance absorption lines seen in the spectrum of a hot companion, due to the wind passing in front of the blue star. We calculated absorption line profiles that would be seen in the ultraviolet part of the blue co...
... thousands of lines. ... analyst to be educated on every line of code in the model, but learning the key elements such as the ...
A line-by-line radiative-transfer model to quantify the Ring effect as caused by rotational Raman scattering has been developed for the 310-550-nm spectral interval. The solar zenith angle and the resolution are key input parameters, as is the sky spectrum (excluding inelastic atmospheric scattering), which was modeled with MODTRAN 3.5. The filling in is ...
A model is derived for the resonance absorption of molecular bands composed of Lorentzian lines is suitable for calculating fluorescence from irradiated air. The model is based on an explicit functional form derived for the resonance absorption of a singl...
The parameters of the observed gamma -quantum resonance absorption spectrum in crystals is calculated for single and split lines by taking into account self absorption in the source. (auth)
Energy Citations Database
... ABSTRACT The absorption by CO2 between 3100 and 4100 cm 1 ... Absorption between 3770 and 4100 cm"1 by the extreme wings of strong lines ...
An active remote sensing instrument for the characterization of atmospheric absorption, scattering, and scintillation at several key high energy laser wavelengths is in development. The instrument is based on narrow band tunable diode lasers fiber coupled to a 12'' Ritchey-Chretien transmit telescope and a second receive telescope with visible or near ...
Carbon monoxide (CO) is a very important gas generated in the industrial process; therefore to implement CO concentration on-line monitoring is a key factor for industrial process control. Tunable diode laser absorption spectroscopy (TDLAS) is a high sensitive, high selective and fast trace gas detection technique. With the features of ...
A convenient graphical method for calculating the second moments of broad nuclear magnetic resonance absorption lines is presented. (W.D.M.)
