Results 191 to 200 of about 16,029 (248)

FTIR and FT Raman Spectra of B6O

Journal of Solid State Chemistry, 1997
Abstract The IR active phonon spectrum of B 6 O is typical for the α -rhombohedral boron structure group. The number of phonons corresponds exactly to that predicted by group theory. The phonon bands in the spectrum are weakly damped, indicating that the structure is largely undistorted.
H. Werheit, U. Kuhlmann
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FT-Raman Spectroscopy at 1.339 Micrometers

Applied Spectroscopy, 1994
The usual laser employed for Fourier transform Raman spectroscopy is a Nd:YAG unit lasing at 1.064 μm. In this work, use of the 1.339-μm lasing emission from Nd:YAG has been demonstrated. The sensitivity of this instrument is comparable to that of conventional FT-Raman instruments, and excellent anti-Stokes spectra can be easily obtained.
Kelly J. Asselin, Bruce Chase
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FT-Raman Spectroscopy: Development and Justification

Applied Spectroscopy, 1986
There has long been a widespread interest in the feasibility of Fourier transform Raman spectroscopy. The well-deserved reputation of FT-IR has generated hopes for similar benefits in Raman spectroscopy, and the complementarity of IR and Raman spectroscopy has made the use of a single instrument for both spectroscopies both convenient and cost ...
T. Hirschfeld, B. Chase
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New directions in FT-Raman spectroscopy

SPIE Proceedings, 1994
Although FT-Raman spectroscopy has proven to be applicable to a wide variety of applications, there remains a small number of samples which are not easily analyzed with the technique. Several sampling accessories which have been developed to further expand the applications of FT-Raman spectroscopy are demonstrated.
Janice L. Hellman, Nancy T. Kawai, Carolin Lehner, Paul H. Turner   +3 more
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FT-Raman Investigations of Forest Products

Applied Spectroscopy, 1990
FT-Raman spectroscopy has been used to analyze several forest product materials. Spectra of balsa, oak, pine, and redwood have been obtained. These data can be used to differentiate between hard and soft woods by examination of the ratio of the intensities of those bands attributable to cellulose and lignin as well as by the ...
R. C. Kenton, R. L. Rubinovitz
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FT Raman spectroscopic studies of wool

Journal of the Society of Dyers and Colourists, 1994
FT Raman spectroscopy has been used to investigate the structure of scoured wool cloth and fibres subjected to hydrogen peroxide bleaching. The advantages of FT Raman spectroscopy over conventional laser Raman and IR spectroscopic techniques are discussed.
L J Hogg, H G M Edwards, D W Farwell, A T Peters   +3 more
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Sampling Methods In FT-Raman Spectroscopy

SPIE Proceedings, 1989
The extension of the Raman technique to the use of excitation wavelengths in the near infrared shows much promise, especially for samples exhibiting strong fluorescence when excited by the visible lasers used in dispersive Raman instrumentation. The dependence of the Raman signal on the fourth power of the excitation wavelength has precluded the common
Philip R. Brierley, Robert J. Rosenthal
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FT Raman spectroscopy of drugs in polymers

International Journal of Pharmaceutics, 1990
Abstract The value of Fourier transform Raman spectroscopy in quantifying drug/polymer mixtures is demonstrated. Spectra of promethazine, diclofenac, theophylline and indomethacin in polymeric diluents based on polyethylene oxide, sodium alginate and hydroxypropylmethylcellulose are given.
M.C. Davies, J.S. Binns, C.D. Melia, P.J. Hendra, D. Bourgeois, S.P. Church, P.J. Stephenson   +6 more
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Pressure-tuning FT-Raman spectroscopy

SPIE Proceedings, 1994
Pressure-tuning dispersive Raman spectroscopy, using diamond anvil cells, has many of the common limitations of Raman spectroscopy such as low signal intensity, as well as photodecomposition and fluorescence of many samples. In the present investigations, the pressure-tuning experiment has been successfully coupled to an FT-Raman spectrometer using a ...
Steven M. Barnett, Stephane H. Brienne, Ross D. Markwell, Nancy T. Kawai, Ian S. Butler, Denis F. Gilson, Antonin Vlcek, Jr.   +6 more
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Artifacts In FT-Raman Spectroscopy

SPIE Proceedings, 1989
The rapid improvements in detector technology, interferometer optimization and filter technology have brought the sensitivity in FT-Raman spectroscopy to a point where spectra can be recorded quite readily from most samples. The limitation is no longer due to detector noise.
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