An apparatus for performing scanning tunneling optical absorption spectroscopy includes a scanning tunneling microscope tip positioned at a tunneling distance over a surface portion of a sample to be analyzed, biasing apparatus for producing an electric p...
National Technical Information Service (NTIS)
... The Fourier transforms of the EXAFS indicate Fe-Fe interactions. ... EXAFS. yet there is a distinct Fe-Fe separation of 5.08 X. This distance is -5- ...
DTIC Science & Technology
... high resolution IR absorption spectroscopy in ... Descriptors : *HYDROGEN, *ABSORPTION, *SOLID ... PROPERTIES, INFRARED SPECTROSCOPY ...
The influence of distances between the lens and a pure lead target on the breakdown spectroscopy of plasmas induced by a Nd:YAG laser ablation was studied at atmospheric pressure. The electron density, the electron temperature and the self-absorption were analysed when the distances were less than the focal length ...
NASA Astrophysics Data System (ADS)
The spatial and temporal evolution of aluminum and aluminum monoxide produced during laser ablation of an aluminum sheet were tracked by way of emission and absorption spectroscopy. Atomic Al and molecular AlO temperatures were deduced from the emission spectroscopy data at several distances from the Al sheet ...
Energy Citations Database
(QIALs) and spatially intervening absorp- tion lines (SIALs). QIALs are thought to be produced by gas absorbers, which produce lines with b = 10,000�20,000 km s�1, are thought to be at a distance of a few tensSUBARU HIGH-RESOLUTION SPECTROSCOPY OF COMPLEX METAL ABSORPTION LINES OF THE QUASAR HS 1603
E-print Network
We demonstrate a new all-optical, frequency-multiplexed and fast technique for gas-phase ultrasonic absorption spectroscopy. A pulsed laser produces a short-duration acoustic pulse in the gas sample, and the acoustic pulse profiles at two distances are mo...
X-ray absorption spectroscopy is used to study the structure of transition metal ions as they encounter excess solvent and dissolve; more particularly, Cu in bentonite, with methanol solvent. The distance between the Cu ion and the oxygen atom increases b...
... Title : ULTRASONIC ABSORPTION SPECTROSCOPY IN FLUIDS BY OPTICAL DETECTION OF PHOTOACOUSTIC PULSE PROFILES. ...
TUNABLE DIODE LASER ABSORPTION SPECTROSCOPY VERIFICATION ANALYSIS FOR USE IN THE COMBUSTION OPTIMIZATION AND ...
... Accession Number : AD0422032. Title : THE USE OF INFRARED ABSORPTION SPECTROSCOPY IN RESEARCH ON HAFNIA AND ZIRCONIA. ...
... Accession Number : AD0606049. Title : ATOMIC ABSORPTION SPECTROSCOPY. Descriptive Note : Final rept. Corporate ...
... Accession Number : ADD752978. Title : AEROSOL ABSORPTION SPECTROSCOPY. Descriptive Note : CONFERENCE PAPER. ...
... Title : A STUDY OF OPTICAL ABSORPTION SPECTROSCOPY FROM METASTABLE EXCITED STATES OF TRANSITION METALS IONS IN ...
We propose a system for time-domain diffuse optical spectroscopy extending up to 1300 nm based on a supercontinuum source and time-correlated single photon counting detection. The system was validated on liquid phantoms demonstrating a good linearity up to an absorption coefficient of 2.0 cm-1. Preliminary measurements on collagen powder reveal an ...
... ATOMIC EMISSION SPECTROSCOPY; ATOMIC ABSORPTION ... SPECTROSCOPY; MOLECULAR FLUORESCENCE SPECTROSCOPY; X- ...
... STRUCTURE, SPECTROSCOPY, INFRARED SPECTROSCOPY, ABSORPTION SPECTRA, ULTRAVIOLET SPECTROSCOPY, CHEMICAL ...
... MOLECULAR SPECTROSCOPY, LASER INDUCED FLUORESCENCE, MOLECULAR ... ABSORPTION, ATOMIC SPECTROSCOPY, DISSOCIATION ...
X-ray absorption spectroscopy (XAS) was used to study the arsenic fluorocomplexes, including the AsF sub 5 and AsF sub 6- intercalates of graphite, and rubidium metal-ammonia solutions. The As-F distances obtained for AsF sub 3 and AsF sub 5 gas are both ...
Near-infrared spectroscopy and photometry was obtained of comet Halley in December 1985 when its heliocentric distance was 1.19 AU. No water ice absorption or molecular band emission were observed. The interstellar 3.3-micron emission band was also not observed. The 3-micron spectrum of comet Halley consisted of scattered sunlight at ...
We present the method for study of the characteristics of the supernova remnants using their absorption properties. The background radiation sources are several stars with wide range of distances. Main task is accurate extraction of stellar spectra from observations. For Vela Jr. supernova remnant we found the absence of typical broad ...
X-ray absorption spectroscopy (XAS) is an ideal technique for the investigation of the local structure in materials and in particular around dopant species in semiconducting crystals. This experimental technique permits the quantitative determination of structural parameters such as the bond distances and number of neighbors that are ...
The technique of x-ray absorption spectroscopy using tuneable, very intense x-rays from a high energy electron storage ring has been applied to study of the estended x-ray absorption fine structure for Cu and Ni tetraphenylporphyrin and methemoglobin. Preliminary analysis shows that the spectra may be interpreted as a super-position of ...
PubMed Central
Laser induced fluorescence (LIF) was utilized for the determination of the densities of Ti atoms and ions (Ti+) in a dc magnetron discharge. The densities were measured under different discharge conditions, namely the discharge current, working pressure and distance from the magnetron target. The total density of species in the discharge was calculated using additional ...
The conceptual design of an open-path atmospheric monitor combines an acousto-optic tunable filter for emission spectroscopy (3-14 {mu}m) with a mid-IR (4.6-5.4 {mu}m) for absorption spectroscopy. It utilizes mostly commercially available components, covers a large area ({approximately}4 km radius), measures the ...
DOE Information Bridge
Previously, Chance and coworkers have demonstrated the use of time- resolved spectroscopy to detect changes in deoxy- and oxy-hemoglobin concentrations in brain, muscle, and tumors. In this study, we examine the potential to quantitate hemoglobin saturation and tissue oxygenation from steady-state, dual-wavelength measurements in the frequency domain. Frequency-resolved ...
... Descriptors : *DIODE LASERS, *TUNABLE LASERS, *SPECTROSCOPY, *ABSORPTION SPECTRA, LASER DIAGNOSTICS, COMBUSTION ...
... Title : The Polarized Absorption Spectroscopy as a Novel Method for Determining the Orientational Order of Poled Nonlinear Optical Polymer Films. ...
Upper atmosphere molecular oxygen concentrations measured by absorption spectroscopy, noting diurnal
NASA Technical Reports Server (NTRS)
vancements in Cavity Enhanced Laser Absorption Spectroscopy address all these concerns while offering exceptional sensitivity ...
NASA Website
... Accession Number : ADA408603. Title : High Resolution Infrared Absorption Spectroscopy of Molecular Dopants in Cryogenic Solid Parahydrogen. ...
... Accession Number : AD0730390. Title : Experiments in Atomic Absorption Spectroscopy with a Carbon Filament Atom Reservoir,. ...
... Accession Number : ADD325658. Title : ACOUSTICAL ABSORPTION SPECTROSCOPY OF LIQUIDS BETWEEN 0.15 AND 3000 MHZ: III. ...
Fluorescence spectroscopy of proteins, analyzing polarity, distances between groups, flexibility and
X-ray absorption spectroscopy measurements on rare-earth (R) and Ba sites in the new superconducting oxides and in binary rare-earth oxides are discussed. All of the near-edge spectra appear to manifest a continuum resonance feature whose energy is quantitatively well correlated with the R--O and Ba--O bond lengths. Evidence supporting a second such ...
... Accession Number : AD0194211. Title : ULTRASONIC ABSORPTION AND MICROSCOPY AND SPECTROSCOPY. Corporate Author : ...
... Descriptors : (*VAPOR PRESSURE, RESONANCE ABSORPTION), (*COPPER, LINE SPECTRA), ABSORPTION SPECTRA, SPECTROSCOPY ...
... Accession Number : AD0683698. Title : STIMULATED RAMAN EMISSION AND ABSORPTION SPECTROSCOPY. INTENSITY ...
... PROGRESS IN APPLYING TUNABLE DIODE LASER ABSORPTION SPECTROSCOPY TO SCRAMJET ISOLATORS AND COMBUSTORS ...
... PHENYL RADICALS, ABSORPTION, ABSORPTION SPECTRA, AMPLITUDE ... SIGNALS, STARK EFFECT, TEMPERATURE, ULTRASONICS ...
... INDUCED FLUORESCENCE, *LASER APPLICATIONS, MATHEMATICAL MODELS, EMISSION, REPRINTS, LIGHT SCATTERING, ABSORPTION ...
... TERBIUM, SPECTROSCOPY), CALCIUM COMPOUNDS, TUNGSTATES, IMPURITIES, ABSORPTION SPECTRA, FLUORESCENCE, IONS, ...
... Descriptors : , (*ULTRAVIOLET SPECTROSCOPY, HALOGEN COMPOUNDS), (*HALOGEN COMPOUNDS, ULTRAVIOLET SPECTROSCOPY ...
... with hydrogen, methane, carbon ... SPECTROSCOPY, *REACTION KINETICS, *EXHAUST ... RESONANCE ABSORPTION, COMBUSTION PRODUCTS ...
... Descriptors : *ATOMIC SPECTROSCOPY, *MOLECULAR ... PROCESSING, SPECTROMETRY, SPECTROSCOPY, SYMPOSIA, ABSORPTION ...
... Accession Number : ADD419473. Title : Photoacoustic Spectroscopy: A Measurement Technique for Low Absorption Coefficients,. ...
... RESINS BY INFRARED SPECTROSCOPY, LIQUID CHROMATOGRAPHY, ATOMIC ABSORPTION SPECTROSCOPY AND DIFFERENTIAL ...
... Current laboratory methods employ either atomic absorption spectroscopy or inductively coupled plasma spectroscopy . ...
X-ray absorption spectroscopy was used to determine the local structure of U(VI) within synthetic fluorapatite at a concentration of 2.3 wt %. Extended X-ray absorption fine structure indicates that U(VI) substitutes into the Ca1 site. To accommodate this substitution the apatite structure significantly distorts such that the Ca1 site ...
PubMed
... Accession Number : AD0031270. Title : X-RAY SPECTROSCOPY. ... Descriptors : *X RAY SPECTROSCOPY, CRYOSTATS, ABSORPTION, ARGON. ...
... Infrared spectroscopy, atomic absorption spectroscopy, emission spectroscopy and chemical analysis were used to characterize their chemical ...
