Results 271 to 280 of about 253,971 (308)

A standard for transmission electron spectroscopy

Proceedings, annual meeting, Electron Microscopy Society of America, 1978
A 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, 1997
The 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, D Labrie, K Olson, B Paton, A M Simpson, G W Iseler, A Borshchevsky   +6 more
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Atmospheric transmission spectroscopy using the sun as the source

Applied Optics, 1990
A 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, W A, Peterson, B K, Matise, J L, Manning, R E, Soulon   +4 more
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Sensitivity-Enhanced Transmission Raman Spectroscopy

Applied Spectroscopy, 2013
Transmission 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, 2010
Picosecond 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, Pavel, Matousek, Neil, MacLeod, Kate L, Ronayne, Ian P, Clark   +4 more
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Detection in situ of carotenoid in microalgae by transmission spectroscopy

Computers and Electronics in Agriculture, 2015
Vis/NIR transmission spectra in situ to determine the CC in Spirulina sp.Variable selection method of LW analysis, UVE and SPA were used.The prediction performance of x-LW-PLS, UVE-PLS and SPA-PLS were compared.A high RPD value of 3.40 and 3.44 were obtained by x-LW-PLS and SPA-PLS models.
Yongni Shao, Jian Pan, Chang Zhang, Lulu Jiang, Yong He 0001   +4 more
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Ultrasound transmission spectroscopy: In-line sizing of nanoparticles

2014 IEEE International Ultrasonics Symposium, 2014
Nanoparticles 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, Volker, A.W.F., Pierre, G., Bouvet, F., Crozat, S.   +4 more
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Transmission electron microscopy at 20kV for imaging and spectroscopy

Ultramicroscopy, 2011
The electron optical performance of a transmission electron microscope (TEM) is characterized for direct spatial imaging and spectroscopy using electrons with energies as low as 20 keV. The highly stable instrument is equipped with an electrostatic monochromator and a C(S)-corrector.
U, Kaiser, J, Biskupek, J C, Meyer, J, Leschner, L, Lechner, H, Rose, M, Stöger-Pollach, A N, Khlobystov, P, Hartel, H, Müller, M, Haider, S, Eyhusen, G, Benner   +12 more
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Transmission spectroscopy of a thin membrane

American Journal of Physics, 1993
A few-micron-thick nitrocellulose membrane stretched flat across an open frame (a ‘‘pellicle’’) has gently modulated passbands typically spaced by 20–60 nm across the visible and near-infrared. This makes it an attractive subject for an upper-division laboratory exercise.
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Terahertz transmission spectroscopy of chalcogenide glasses

2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves, 2008
Terahertz transmission of a chalcogenide family of glasses is reported. The glasses were processed using established methods for non-oxide glasses. Transmission through the samples was measured using a THz spectrometer. The transmission and optical properties of the glasses are summarized.
S. K. Sundaram, Brian J. Riley, Jarrod V. Crum   +2 more
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