laser induced fluorescence study of the Ca(ℓ rS r) + X r CaX(X℗ r) + X(X=F,Cl) reactions.

by Michael Robin Corbett

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Published: Pages: 155 Downloads: 616
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An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker. Audio An illustration of a " floppy disk. Laser induced fluorescence studies in the inductively coupled plasma Item Preview remove-circle Share or Embed This Item. Sujatha, Rai L, Kumar P, et al. Protein profile study of Pap smear and tissue of cervix by high performance liquid chromatography- laser induced fluorescence. In: Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues V; January ; pp. B– Proceedings of SPIE. OH Planar Laser Induced Fluorescence (PLIF) Measurements for the Study of High Pressure Flames: An Evaluation of a New Laser and a New Camera System [NASA Technical Reports Server (NTRS)] on *FREE* shipping on qualifying offers. OH Planar Laser Induced Fluorescence (PLIF) Measurements for the Study of High Pressure Flames: An Evaluation of a New Laser and a New . Laser-induced fluorescence (LIF) is a highly sensitive resonant technique that can readily be employed for studying the distributions of minor species, down to sub-ppm levels, both qualitatively and quantitatively, and for measuring temperature fields and flame front propagation. At present LIF is one of the most widely utilized laser.

  Nitric-Oxide Planar Laser-Induced Fluorescence Applied to Low-Pressure Hypersonic Flow Fields for the Imaging of Mixture Fraction 1 January | Applied Optics, Vol. 42, No. 33 Skin-Friction Measurements in a Supersonic Combustor with Crossflow Fuel Injection.   The rotationally resolved spectra of the (0,0) band were examined using both radiative emission and laser-induced fluorescence in order to measure rotational temperatures in the flow. A comparison was made between the measured flow field properties and those predicted by a method of characteristics (MOC) solution. The objectives of this study were to evaluate the ability of time-resolved, laser-induced fluorescence spectroscopy (TR-LIFS) to serve as a noninvasive diagnostic technique for squamous cell carcinoma in the hamster cheek pouch model and to determine whether time-resolved, fluorescence-derived parameters can add diagnostic value to fluorescence.   Objective: The objective of this study is to evaluate the efficacy of laser-induced fluorescence (LIF) data obtained at nm pulsed laser excitation for the discrimination of normal, benign, and malignant ovarian ound Data: Several studies have reported that the autofluorescence technique has a high specificity and sensitivity for discrimination between diseased .

Oh Planar Laser Induced Fluorescence (Plif) Measurements for the Study of High Pressure Flames: An Evaluation of a New Laser and a New Camera System: Nasa, National Aeronautics and Space Adm: : BooksAuthor: National Aeronautics and Space Adm Nasa. The fluorophore/DNAPL mixture may be detected in-situ using Laser Induced Fluorescence (LIF) probes, allowing the detection and delineation of the DNAPL source zone(s). Laser-induced fluorescence spectroscopy can provide a highly sensitive and selective means of detecting atomic and ionic impurities. Because the photodetector can be physically isolated from the laser-excited region, these techniques can be applied to monitoring in hostile environments. The basic concepts behind fluorescence detection are reviewed. We describe a time-gated laser-induced fluorescence instrument designed for accurate (±5%, 1σ), continuous, autonomous, in situ observations of NO2 with the sensitivity (15 ppt/10 s at S/N = 2) and portability necessary to study NO2 anywhere in the troposphere. The technique is advantageous because it is spectroscopically specific and direct in that it does not require conversion of NO2 into.

laser induced fluorescence study of the Ca(ℓ rS r) + X r CaX(X℗ r) + X(X=F,Cl) reactions. by Michael Robin Corbett Download PDF EPUB FB2

Energy partitioning of the CaI product from the Ca + CH 3 I and Ca + CF 3 I reactions was studied by laser-induced fluorescence. Product vibrational state distributions were by: Abstract. In the past many reactions of Ba atoms with halogen compounds were studied by the method of laser-induced fluorescence and it was found that the vibrational population distribution of the barium halide product molecules behaves very different depending on the reagent molecule: A systematic change of the vibrational distribution was measured in going from HF to HI [1], while the Cited by: 1.

We study the laser induced fluorescence spectroscopy of the calcium dimer deposited on helium and mixed helium/argon clusters. In the wavelength range between and nm, the Ca Cited by: 1. We study how the laser induced fluorescence spectroscopy of the calcium dimer deposited on pure helium clusters is modified by the addition of xenon atoms.

In the wavelength range between and 3 Cited by: 1. adshelp[at] The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A. We probe the ion velocity distribution using laser-induced fluorescence.

We use a low-power cw laser beam detuned from resonance at a wavelength of nm, corresponding to the Ca + 4 s 2 S 1 / 2 → 4 p 2 P 1 / 2 ∘ transition (see Fig. 3b). The laser beam is collimated to a diameter of 4 mm, attenuated to 1 mW, aligned to spatially overlap. The dispersed fluorescence spectra originating from the v′ = 2 and v′ = 0 levels of the A 2 Π 3/2 state of iodine monoxide (IO) have been recorded for the first time after laser induced fluorescence (LIF) excitation in the A 2 Π 3/2 ← X 2 Π 3/2 electronic transition.

The results are used to obtain relative Franck–Condon factors for various v′ → v′′ transitions in the A 2 Π. The possible uses of laser Induced fluorescence In analytical chemistry were investigated. Infrared fluorescence was induced from ethylene, propylene, 1-butene, ethyl ether, acetaldehyde, methyl alcohol and ethyl alcohol with a CO^ laser radiating at microns.

A study. The laser-induced fluorescence detection is achieved by using the following optical setup. A nm laser beam (Compass M; Coherent Inc., Santa Clara, CA) or a nm laser beam (RCL; Crystalaser, Reno, NV), guided by a single-mode optical fiber (OZ Optics, Canada) and collimated with a 5× objective lens (Zeiss), is sent to an inverted microscope (TE; Nikon, Melville, NY) as an.

A comparative study of LED‐induced fluorescence and laser‐induced fluorescence in SDS‐CGE: Application to the analysis of antibodies. Audrey Rodat‐Boutonnet. Picometrics, Toulouse, France.

Search for more papers by this author. Pierre Naccache. Picometrics, Toulouse, France. Among the newest measurement techniques are those based on laser induced fluorescence.

The first successful application of fluorescence imaging was reported in Despite this short history LIF techniques have become very powerful and are the most widely used non. The high-resolution laser-induced fluorescence spectrum of a molecular beam sample of calcium monohydride (CaH) in the region of the strongly overlapped (1,0) A 2 Π X 2 Σ + and (0,0) B 2 Σ + X 2 Σ + band systems near nm and the (0,0) A 2 Π X 2 Σ + band system near nm have been recorded and analyzed.

The spectral features exhibit a small splitting that is attributed to proton. Laser-induced fluorescence (LIF) or laser-stimulated fluorescence (LSF) is a spectroscopic method in which an atom or molecule is excited to a higher energy level by the absorption of laser light followed by spontaneous emission of light.

It was first reported by Zare and coworkers in LIF is used for studying structure of molecules, detection of selective species and flow visualization. My Life with LIF: A Personal Account of Developing Laser-Induced Fluorescence Richard N.

Zare Annual Review of Analytical Chemistry Effects of Saturation on Laser-Induced Fluorescence Measurements of Population and Polarization R Altkorn, and and R N Zare. Laser Induced Fluorescence of Iodine (Last revised: FMH 29 Sep ) 1.

Introduction. In this experiment we are going to study the laser induced fluorescence of iodine in the gas phase. The aim of the study is to determine the following molecular parameters of iodine in the ground state: the dissociation energy (D. and D. 0), vibrational. Laser-Induced Fluorescence in Spectroscopy, Dynamics, and Diagnostics David R.

Crosley Molecular Physics Laboratory, SRI International, Menlo Park, CA In the technique of laser-induced fluorescence, or LIF, a laser is tuned so that its frequency matches that of an ab- sorption line of some atom or molecule of interest. The ab- sorption of the laser photons by this species produces an.

Laser Induced Fluorescence - Construction of the Apparatus and Kinetic Studies of the O(3p) I2 Reaction: Yip, Wai-Tak, 葉偉德: Books - or: Wai-Tak Yip. Laser-induced spontaneous emission Multi-step process: absorption followed by emission (fluorescence) Notes May occur from multiple states Not instantaneous 2 1.

Introduction 2 1 Laser absorption (pulsed or CW laser) hν(spont. Emission) = LIF signal This is the laser-induced fluorescence Possible collisionalchange.

The laser irradiation have shown a range of applications from fabricating, melting, and evaporating nanoparticles to changing their shape, structure, size, and size distribution. Laser induced plasma has used for different diagnostic and technological applications as detection, thin film deposition, and elemental identification.

The possible interferences of atomic or molecular species are. Laser-induced fluorescence has been used to determine the lifetimes of resolved ro-vibrational levels (v′, J′) in the predissociated parts of the excited B 3 Π(0 + u) manifold of 35 Cl 35 inations were made over the ranges 13 ⩽v′⩽ 25 (except v′= 17, 20), and 0 ⩽J′⩽ The lifetimes (τ 0) showed strong variations with both rotational and vibrational quantum numbers.

Objective: To probe into the effect of laser-induced fluorescence (LIF) on color and translucency of human enamel during tooth bleaching.

Materials and methods: Twenty enamel slabs were randomly assigned to be whitened by acidic 30% hydrogen peroxide (HP), neutral 30% HP, alkaline 30% HP, and distilled water, respectively, monitored by a colorimeter and Raman spectrometer simultaneously.

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Laser-induced fluorescence study of a xenon Hall thruster. Stanford Univ., CA. Abstract: The laser-induced fluorescence (LIF) diagnostic is a powerful non-intrusive tool to obtain velocity distribution function of ions or atoms, with a good time (≈ μs) and space (≈ mm) resolution.

LIF uses the optical pumping of an ion or atom transition by a laser frequency shifted by Doppler effect: if ω L is the laser frequency, ω 0 the ion or atom transition frequency at.

Get this from a library. Laser Induced Fluorescent Study of Relativistic Electron Beams. [Edward J Yadlowsky; Robert C Hazelton; HY-TECH RESEARCH CORP RADFORD VA.;] -- The magnetic fields associated with a relativistic electron beam propagating in a gas provide information about the net current distribution in the beam and the stability of the beam with respect to.

Laser-induced spontaneous emission Multi-step process: absorption followed by emission (fluorescence) Notes May occur from multiple states Not instantaneous 2 1. Introduction 2 1 Laser absorption (pulsed or CW laser) hν(spont. Emission) = LIF signal This is the laser-induced fluorescence Possible collisional change.

This study examines the potential applications of laser-induced fluorescence as a plasma diagnostic technique for Kr I and Kr II. Candidate electronic transitions are examined to determine their suitability for successful routine application of laser-induced fluorescence.

Laser-Induced Fluorescence (LIF) Fluorescent dyes (molecules) can absorb light at one frequency and subsequently re-emit (fluoresce) light at a different frequency. In experiments, the dyes are excited by laser light whose frequency closely matches the excitation frequency of the dye.

For. Planar laser induced fluorescence (PLIF) is used by the Combustion Branch at the NASA Glenn Research Center (NASA Glenn) to assess the characteristics of the flowfield produced by aircraft fuel injectors.

To improve and expand the capabilities of the PLIF system new equipment was installed. The new capabilities of the modified PLIF system are assessed by collecting OH PLIF in a methane/air.

Oh Planar Laser Induced Fluorescence (Plif) Measurements for the Study of High Pressure Flames: An Evaluation of a New Laser and a New Camera System: Nasa Technical Reports Server (Ntrs): Books - at: Paperback. The applied method is therefore called: time-integrated laser-induced fluorescence spectroscopy, or short LIF(t).

The process of UV fluorescence is one of the most efficient interactions between light and matter, and it occurs as described above in dependency of the substances involved and substrate media, with measurably different speeds.

Buy Laser Induced Fluorescence - Construction of the Apparatus and Kinetic Studies of the O(3p) I2 Reaction by 葉偉德, Yip, Wai-Tak online on at best prices. Fast and free shipping free returns cash on delivery available on eligible : Wai-Tak Yip.We have developed a new diagnostic based on two-photon absorption laser induced fluorescence (TALIF).

We use a high intensity (5 MW/cm{sup 2}), narrow bandwidth ( cm{sup −1}) laser to probe the ground state of neutral hydrogen, deuterium and krypton with spatial resolution better than cm, a time resolution of 10 ns, and a measurement cadence of 20 Hz.Laser-induced fluorescence: | |Laser-induced fluorescence or LED induced fluorescence (LIF)| is a |spectroscopic| World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most definitive collection ever assembled.