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Dependence of Signal on Depth in Transmission Raman Spectroscopy.
Applied Spectroscopy, 2011Recently, transmission Raman spectroscopy has been shown to be a valuable tool in the volumetric quantification of pharmaceutical formulations. In this work a Monte Carlo simulation and experimental study are performed to elucidate the dependence of the Raman signal on depth from the viewpoint of probing pharmaceutical tablets and ...
Alison Nordon +2 more
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Transient infrared transmission spectroscopy
Analytical Chemistry, 1990Transient infrared transmission spectroscopy is a new method that can acquire analytically useful transmission spectra from moving, optically thick solids. No sample preparation is required. The spectra are of sufficient quality for accurate quantitative compositional analysis.
R W, Jones, J F, McClelland
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Transmission Electron Spectroscopy
2021A spectro-microscopic view of the intimate features of the nanomaterials is allowed by means of electron beams. This is achieved with the use of transmission electron microscopes (TEM) equipped with spectrometers such as electron or optical analyzers. The monoenergetic electron beam used in TEM is a minute and intense probe penetrating thin samples.
Agostino, Raffaele Giuseppe +1 more
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Transmission spectroscopy on sawtooth-doping superlattices
Physical Review B, 1989We have performed transmission experiments on sawtooth-doping superlattices of short periodicity (100\char21{}200 A\r{}). Oscillations have been observed in the transmission spectra as a function of frequency due to the size quantization effect. We present a microscopic model of the transmission which takes into account the coupling between quantum ...
, Ullrich +4 more
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A standard for transmission electron spectroscopy
Proceedings, annual meeting, Electron Microscopy Society of America, 1978A variety of standard specimens is needed in order to systematically investigate the instrumentation, specimen, data reduction and quantitation variables in electron energy-loss spectroscopy (EELS). Pure single element specimens (e.g. various forms of carbon) have received considerable attention to date but certain elements of interest cannot be ...
Dennis Maher, David Joy, Peggy Mochel
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Photoluminescence and infrared transmission spectroscopies of
Semiconductor Science and Technology, 1997The first detailed photoluminescence (PL) study of as-grown samples obtained from three different sources is presented. The study was carried out in the 5 - 100 K temperature range and laser excitation densities 0.5 - 5 . PL spectra collected on samples from all sources showed a PL band near 355 meV which is assigned to an transition to the deep native
J B Aufgang +6 more
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Atmospheric transmission spectroscopy using the sun as the source
Applied Optics, 1990A method is presented to obtain normalized high resolution slant path transmittance spectra of the atmosphere. Sample spectra are presented. The spectra are of use in remote sensing applications for various types of atmospheric physics and atmospheric photochemistry research, for validating line parameter compilations, and for modeling slant path ...
W M, Gutman +4 more
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Sensitivity-Enhanced Transmission Raman Spectroscopy
Applied Spectroscopy, 2013Transmission Raman sensitivity for a representative commercial pharmaceutical tablet was increased by a factor of 40 using optics that returned lost laser and Raman photons to the tablet surface. A new achromatic one-way mirror is introduced that uses the spatial coherence of laser light to nondestructively force laser photons through the reflective ...
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Temporal and Spatial Resolution in Transmission Raman Spectroscopy
Applied Spectroscopy, 2010Picosecond time-resolved transmission Raman data were acquired for 1 mm thick powder samples of trans-stilbene, and a Monte Carlo model was developed that can successfully model the laser and Raman pulse profiles. Photon migration broadened the incident (∼1 ps) probe pulse by two orders of magnitude.
Neil, Everall +4 more
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Ultrasound transmission spectroscopy: In-line sizing of nanoparticles
2014 IEEE International Ultrasonics Symposium, 2014Nanoparticles are increasingly used in a number of applications, e.g. coatings or paints. To optimize nanoparticle production in-line quantitative measurements of their size distribution and concentration are needed. Ultrasound-based methods are especially suited for in-line particle sizing.
Neer, P.L.M.J. van +4 more
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