... by the IR absorption at 3300 to 400 and 1700 to 40/cm. (Author). Descriptors : (*LUBRICANTS, *INFRARED SPECTROSCOPY), (*STEARATES ...
DTIC Science & Technology
... SPECTROSCOPY, OXYGEN), (*OXYGEN, ABSORPTION SPECTRA), TEMPERATURE, PHOTOELECTRIC EFFECT, UPPER ATMOSPHERE ...
... OF MAGNETIC RESONANCE ABSORPTION SPECTROSCOPY TO THE STUDY OF THE EFFECTS OF MICROWAVES ON BIOLOGICAL ...
Melanin absorption spectroscopy: new method for noninvasive skin investigation and melanoma between malignant melanoma and dysplastic nevi in vivo. These preliminary results are confirmed both to melanoma in situ and then to malignant mela- noma is reflected in the melanin absorption spectra. Our
E-print Network
... Title : Investigation of Molecule-Surface Interactions With Overtone Absorption Spectroscopy and Computational Methods. ...
An investigation was conducted to explore the use of infrared and ultraviolet emission-absorption spectroscopy for determination of temperature profiles in flames. Spectral radiances and absorptances were measured in the 2.7-micron H2O band and the 3064-A...
National Technical Information Service (NTIS)
The high sensitivity technique of laser photoacoustic spectroscopy and optical absorption spectroscopy were utilized to investigate the hydrolysis of Pu(VI) in perchlorate media. Absorption bands attributed to the hydrolysis of Pu(VI) were characterized i...
... been examined using absorption and fluorescence spectroscopy. ... The fluorescence of Cs2 was observed for ... normalized to the atomic line emission ...
... GRATINGS(SPECTRA), *LASERS, *LITHIUM NIOBATES, *OPTICAL EQUIPMENT, ABSORPTION, ANNEALING, BERYL, EMISSION, FIBERS ...
... Abstract : Near infrared spectroscopy has recently been used to measure changes of optical parameters (ie, light absorption or scattering) of brain ...
A multiline absorption spectroscopy technique was investigated based on the single-line absorption spectroscopy technique. An open-path methane-detecting system was designed. An LED was used as a broadband source, and a Fabry-Perot interferometer whose transmission peaks matched the methane ...
PubMed
The relaxation of poled nonlinear optical (NLO) chromophores in polymer films was characterized by infrared reflection-absorption spectroscopy. Both a guest-host system and a photo-crosslinkable polymer system were investigated. Polymethylmethacrylate dop...
The relaxation of poled nonlinear optical (NLO) chromophores in polymer films was characterized by infrared reflection-absorption spectroscopy. Both a guest-host system and a photocrosslinkable polymer system were investigated. Polymethylmethacrylate (PMM...
A new method for fission-track detection by means of absorption spectroscopy is presented. Application of the method to the investigation of the annealing behavior shows the following result: Annealing of fission tracks in apatite crystals containing fossil tracks causes a decrease of the characteristic absorption ...
Energy Citations Database
The dynamics of nonradiative recombination processes are investigated by measuring the thermal expansion and subsequent displacement of a sample surface caused by the absorption of a modulated laser beam. 6 refs., 3 figs.
DOE Information Bridge
... high resolution IR absorption spectroscopy in ... Descriptors : *HYDROGEN, *ABSORPTION, *SOLID ... PROPERTIES, INFRARED SPECTROSCOPY ...
Charge-separation in synthetic donor-pigment-acceptor (DPA) compounds and concentration dimers of porphyrins was investigated by fluorescence quenching, EPR-spectroscopy and picosecond optical absorption spectroscopy. (ERA citation 13:009230)
The signal-to-noise ratio (SNR) in off-axis integrated cavity output spectroscopy (OA-ICOS) is investigated and compared to direct absorption spectroscopy using multipass absorption cells [tunable diode laser absorption spectroscopy (TDLAS)]. Applying ...
Absorption losses at a nanorough silver back reflector of a solar cell were measured with high accuracy by photothermal deflection spectroscopy. Roughness was characterized by atomic force microscopy. The observed increase of absorption, compared to the smooth silver, was explained by the surface plasmon ...
NASA Astrophysics Data System (ADS)
Observations of IRC +10216 are discussed, where a few absorption lines of silane (SiH4) have been observed.
... Four Wave Mixin2 in Saturable Absorptive/Resonant/Nonresonant System ... Resonant ... A. Miahnahri, Laser Spectroscopy and Nonlinear Optics of ...
... Pt in 0.1 M HC104 has been investigated with in situ Fourier Transform Infrared Reflection, Absorption Spectroscopy and electrochemical ...
... Oxidation behavior of SUS430 stainless steel in moist atmospheres has been investigated by infrared reflection absorption spectroscopy at 873 K ...
... 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 used a variety of picosecond transient and cw spectroscopies to investigate the linear and nonlinear optical properties of films of PPE/PPV copolymer semiconductor. The spectroscopies used include absorption, electro-absorption (EA) and two-photon-absorption (TPA). In ...
Using optical absorption and ?-modulated differential spectroscopy we investigated non-doped and Fe-doped Bi12SiO20 sillenite-type crystals. The obtained results show that the doping increase absorption coefficient of the crystal shifts the absorption edge to lower photon energies, and reduce ...
Using far infrared absorption spectroscopy, the authors have investigated electronic transition spectra of Se donors in AlSb as a function of hydrostatic pressure. At least two distinct ground to bound excited state transition lines, which depend quadrati...
This final report gives the results of an investigation on paramagnetic defect centers produced in x-, y-, and neutron irradiated single-crystal calcite. Electron spin resonance absorption spectroscopy was used to make a quantitative study of a number of ...
We measured the x-ray absorption spectra of gaseous chlorine, Carbon tetrachloride, and Ethylene chloride. The samples were mixed with Helium at approximately 1000 ppm concentration and flowed through the detector/sample cell. This consisted of a cavity i...
The potential of the radiofrequency resonance absorption spectroscopy (RRAS) techniques for detecting specified quantities of specific explosives in checked airline luggage was investigated. The RRAS techniques considered in this study included nuclear ma...
Using photothermal deflection spectroscopy, the optical absorption of various a-Si:H films was investigated in the range of 2.1 to 0.6 eV. An absorption shoulder which depends on deposition conditions and on doping was found and was attributed to dangling bonds. The exponential edge broadens with increasing spin ...
The high sensitivity technique of laser photoacoustic spectroscopy and visible absorption spectroscopy were utilized to investigate the hydrolysis of Pu(VI) in perchlorate media. Pu(VI) absorption bands in the 600 to 700 nm were characterized as a functio...
Three areas have been investigated: (1) application of esr spectroscopy and time-resolved diffuse reflectance absorption and emission spectroscopy to establish mechanisms in photocatalytic oxidative degradations of organic molecules; (2) exploration of co...
Three areas have been investigated: application of ESR spectroscopy and time-resolved reflectance absorption and emission spectroscopy to establish mechanisms in photocatalytic oxidative degradations of organic molecules; exploration of controlled oxidati...
The kinetics of acetylene absorption on clean Fe(110) have been investigated using a combination of molecular beam relaxation spectroscopy (MBRS) and Auger electron spectroscopy (AES) techniques. AES studies indicated significant beam-surface interaction,...
... 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 ...
Using optothermal spectroscopy an investigation is performed of the absorption of the FIR laser molecule acetonitrile (CH3CN) at 63 lines of a tunable waveguide CO2 laser. The results are presented in the form of an atlas which can be used as a reference for further spectroscopic investigations.
be monitored by measuring the transient absorption spectrum though a probe laser pulse that is variably delayedFemtosecond transient absorption dynamics of close-packed gold nanocrystal monolayer arrays q Sang Femtosecond transient absorption spectroscopy is used to investigate hot electron ...
-absorption, and transmission Fourier transform infrared (FT-IR) spectroscopy methods have been used to investigate spectroscopy in a KBr pellet, (b) grazing angle IR spectroscopy on a gold surface, and (c) transmission IR at a scan rate of 2 Hz. FT-IR Spectroscopy. Spectra ...
A Fe2+:ZnSe laser emitting in the spectral range between 3.77 and 5.05 ?m is used for the first time for intracavity laser spectroscopy. The intracavity absorption spectra of methane in the 4.1-?m region are recorded at different instants of lasing (0-80 ?s) and the dynamics of spectral holes during lasing is investigated. It is found ...
The results of an investigation on the feasibility of determining H/sub 2/S in atmosphere as well as sulfides by an indirect atomic absorption spectroscopy method are reported. The method uses a known amount of buffered Pb(CH/sub 3/COO)/sub 2/ solution added to the test sample and measures the excess reagent using atomic ...
An x-ray absorption spectroscopy (XAS) investigation of the structural changes occurred upon hydriding in the Friauf-Laves phase compounds CeFe(sub 2), CeRu(sub 2)and LaRu(sub 2) compounds is presented. The analysis of the extended x-ray absorption spectr...
Magnetic overlayers of Fe and Co have been investigated with X-ray Magnetic Circular Dichroism in X-ray Absorption Spectroscopy (XMCD-ABS) and Photoelectron Spectroscopy (PES), including Spin-Resolved Photoelectron Spectroscopy (SRPES), at Beamline 4 at the Advanced Photon Source (APS). ...
The paper presents absorption spectroscopy investigations of polymorphism of four alcohols: cyclopentanol, cyclohexanol, cycloheptanol and t-butanol in the mid infrared range. The study of cyclohexanol is more extended and included some neutron scattering...
Free-radical chain oxidation of polymers initiated by ionizing radiation was investigated by EPR, radiothermoluminescence, and optical spectroscopy. The absorption of molecular oxygen which accompanies the oxidation process was investigated. It was found that radical anions and cations actively participate in chain ...
A simulative investigation of noise effects in wavelength modulation spectroscopy (WMS) and direct absorption diode laser absorption spectroscopy is presented. Special attention is paid to the impact of quantization noise of the analog-to-digital conversion (ADC) of the photodetector signal in ...
Pressure toasted peas and soybean flours were investigated in the ultraviolet (UV) and visible region by means of the photoacoustic (PA) spectroscopy and in near infrared (NIR) by the reflectance spectroscopy. Both techniques were shown capable of detecting the changes in flours caused by the heat treatment. The PA spectra of peas show ...
X-ray absorption spectroscopy at the C K edge has been performed on carbon nanotubes to demonstrate the capability of the technique to investigate the electronic structure of these systems. We compare and discuss the experimental results achieved on both graphite and nanotubes trying also to determine the relationship between multiple ...
We have investigated electronic structures of graphite oxide using x-ray absorption spectroscopy at carbon and oxygen K-edges. Unoccupied states such as ?^* and ?^* states originating from sp^2 hybridization in graphite are also visible in the graphite oxide, even though the graphite oxide experiences a severe oxidation. Additional ...
We have investigated the electronic structure of graphite oxide using X-ray absorption spectroscopy at the carbon and oxygen K-edges. The unoccupied ?* and ?* states associated with sp2 hybridization in graphite, are also apparent in the graphite oxide, which indicates that it has a graphitic structure even though it experiences ...
In this study, wheat leaves infected with brown rust, a plant disease of serious economic concern caused by the fungus Puccinia triticina, were investigated using spatially resolved XANES (X-ray Absorption Near Edge Structure) spectroscopy at the sulfur K-absorption edge.
The local atomic structure surrounding uranium in borosilicate glass has been investigated using fluorescence x-ray absorption spectroscopy. By employing angles of incidence either side of the critical angle for total external reflection, surface and near...
Ultrafast relaxation kinetics in [beta]-carotene and lycopene has been investigated by femtosecond absorption and fluorescence spectroscopies using tunable excitation pulses. The transient signals induced by the photoexcitation with larger excess energy have broader bands and longer lifetimes both in the excited states. The excess ...
In order to investigate the post-arc period and the hot gas regions surrounding the electrical arc in circuit breakers, a broad band radiation source has been developed to perform absorption spectroscopy measurements. The radiation spectrum has been chara...
Reflectivity x-ray absorption spectroscopy is applied to investigate surface oxidized copper thin films. The data reveal air exposed film surfaces to comprise a macroscopic mixture of Cu and Cu2O whereas thermally oxidized films comprise a uniform layer o...
