Results 231 to 240 of about 69,047 (265)

Critical-point analysis of the two-phonon Raman spectrum of silicon

Journal of Physics and Chemistry of Solids, 1974
Abstract Two-phonon Raman spectrum of silicon has been measured in back-scattering configuration at room temperature using Argon ion laser. It reveals many critical points and consists mainly of two-phonon overtone states. The agreement between the calculated density of states from neutron diffraction data and the present Raman spectrum is excellent ...
K. Uchinokura, T. Sekine, E. Matsuura
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Raman spectrum and normal co-ordinate analysis of chromyl chloride

Spectrochimica Acta, 1959
Abstract The complete Raman spectrum of CrO 2 Cl 2 , obtained by excitation with helium radiations in the red and near infrared region of the spectrum, is reported. The nine fundamental modes of vibration of the molecule, belonging to the C 2υ point group, are Raman-active and have been assigned to the observed frequencies.
H. Stammreich, K. Kawai, Yara Tavares
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The Raman spectrum of dibenzenechromium and a normal coordinate analysis of complexed benzene

Spectrochimica Acta Part A: Molecular Spectroscopy, 1971
Abstract The Raman spectrum of Cr(C6H6)2 was recorded by a Cary Laser Raman spectrometer. Using the data for nine benzene-metal-π-complexes, a normal coordinate analysis of ligand benzene was executed. The results show that the differences in the vibrational spectra of free and ligand benzene are mainly due to changes in the interaction valence force
Lothar Schäfer, J.F. Southern, S.J. Cyvin   +2 more
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Time-Frequency Characteristic Analysis of Raman Spectrum Signal

2021 13th International Conference on Advanced Infocomm Technology (ICAIT), 2021
Ming Li, Zanyu Geng, Zhen Yang, Jiwen Chen   +3 more
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Raman spectrum and factor group analysis of crystalline titanium tetrachloride

Journal of the Chemical Society D: Chemical Communications, 1971
The Raman spectrum of crystalline titanium tetrachloride has been obtained at ca. 77K, and a factor group analysis of the fundamentals is presented in terms of the known space group C2h5.
R. J. H. Clark, B. K. Hunter, C. J. Willis   +2 more
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A Portable Spectrum Measurement System Based on Laser-Raman and Fluoresce Spectrum for Cooking Oil Analysis

Advanced Materials Research, 2012
A system based on spectrum analysis for cooking oil testing which combining laser-induced-fluorescence and laser-Raman technology is established. Several oil samples are testing by this system. The measurement results show that, there are rich information for fluorescence and Raman spectrum for the oil samples and there are obvious difference between ...
Wei Wei Feng, Wei Zhang, Xiao Xue Tian, Hai Long Peng, Hua Xiong, Ling Xin Chen   +5 more
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[Detection and analysis of several kinds of oils with Raman spectrum].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
Applying Raman spectrometry to detect several kinds of oils such as petrol, diesel oil, naphtha and KHF (aviation fuel hydro treating), the authors can explore the regular laws existing among these oils. The authors detected 150 cases of oils using Raman spectrometer developed by ourselves with 785 nm excitation wavelength miniature portable, and ...
Li-li, Bao, Xiao-hua, Qi, Xiao-fang, Zhang, Wen-feng, Teng, Ming-qiang, Zou, Feng, Liu, Cheng, Zhang   +6 more
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[EMD Time-Frequency Analysis of Raman Spectrum and NIR].

Guang pu xue yu guang pu fen xi = Guang pu, 2016
This paper analyzes the Raman spectrum and Near Infrared Spectrum (NIR) with time-frequency method. The empirical mode decomposition spectrum becomes intrinsic mode functions, which the proportion calculation reveals the Raman spectral energy is uniform distributed in each component, while the NIR's low order intrinsic mode functions only undertakes ...
Xiao-yu, Zhao, Yi-ming, Fang, Feng, Tan, Liang, Tong, Zhe, Zhai   +4 more
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Analysis of the low-frequency isotropic Raman spectrum of molten isotactic polypropylene

Macromolecules, 1991
The feasibility of numerically calculating the low-frequency isotropic Raman spectrum of molten isotactic polypropylene is explored to determine relations between the Raman spectrum and conformational disorder. Two spectra were calculated, one based on conformers generated from an isomeric three-state model and a second based on those from a five-state
V. M. Hallmark, S. P. Bohan, H. L. Strauss, R. G. Snyder   +3 more
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ChemInform Abstract: Structural Analysis of Molecules from Their Raman Spectrum.

ChemInform, 1993
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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