The resolution of adjacent spectral lines in the photoelectric recording of Raman spectra

1966 ◽  
Vol 5 (3) ◽  
pp. 253-255
Author(s):  
A. N. Mogilevskii ◽  
V. A. Slavnyi ◽  
T. E. Abramovich
Keyword(s):  
Raman Spectra ◽  
Spectral Lines ◽  
Photoelectric Recording

scholarly journals Рамановское рассеяние кристаллами гексаборидов редких земель с различными изотопами бора

2018 ◽  
Vol 60 (4) ◽  
pp. 715
Author(s):  
Ю.Ф. Марков ◽  
В.Н. Гурин ◽  
К.В. Понкратов
Keyword(s):  
Raman Scattering ◽  
Raman Spectra ◽  
Rare Earths ◽  
Lanthanum Hexaboride ◽  
Spectral Lines ◽  
Boron Isotope ◽  
First Time

AbstractMonocrystals of lanthanum hexaboride LaB_6 containing both natural boron and its isotopes ^10B and ^11B have been produced using the solution-melt method. Polyelement hexaboride rare-earths have been grown and the corresponding ceramics have been synthesized for the first time. All these crystals have been studied by means of various techniques, generally using Raman scattering. The Raman spectra attributed to various spectral lines corresponding to nonanalyzable representations have been obtained and interpreted. Frequencies and half-widths of spectral lines have been obtained, the removal of degeneracy and the development of respective splitting of degenerate oscillations induced by defects, mainly by boron isotope inclusions, have been identified. The influence of defects on the Raman spectra has been determined.

The Raman and infra-red spectra of carbon suboxide

1954 ◽  
Vol 223 (1153) ◽  
pp. 251-266 ◽  
Keyword(s):  
Raman Spectrum ◽  
Raman Spectra ◽  
Malonic Acid ◽  
Mass Spectra ◽  
Linear Molecule ◽  
Molecular Symmetry ◽  
Carbon Suboxide ◽  
Photoelectric Recording ◽  
Infra Red

The infra-red and Raman spectra of carbon suboxide have been redetermined since earlier data did not permit an unequivocal decision as to the molecular symmetry. The infra-red spectrum of the gas was measured over the range 275 to 4600 cm -1 using a Perkin-Elmer spectrometer. The Raman spectrum of the liquid (at — 90° C) was investigated using a photoelectric recording spectrometer constructed in this laboratory. No trouble was experienced with decomposition of the sample. The purity of the suboxide which was prepared from malonic acid was carefully checked by following changes in the infra-red and mass spectra at various stages of the purification. In this way several bands previously attributed to the suboxide were shown to be due to impurities. Details of a normal co-ordinate treatment are given, and with its aid all the observed bands are given satisfactory assignments on the basis of a linear molecule, symmetry D ∞λ . This necessitates the postulation of one infra-red active fundamental at about 198 cm -1 . Though this lies outside the region investigated here it has recently been observed by O’Loane in the course of investigations on a series of compounds in the far infra-red.

Photoelectric recording of spontaneous raman spectra excited with a He-Ne laser

1971 ◽  
Vol 14 (4) ◽  
pp. 551-552
Author(s):  
G. I. Oleneva ◽  
A. A. Levin ◽  
V. A. Shlyapochnikov
Keyword(s):  
Raman Spectra ◽  
Photoelectric Recording

scholarly journals Construction and Operation of a dispersive Laser Raman Spectrograph using interference filter

1970 ◽  
Vol 32 (1) ◽  
pp. 121-129
Author(s):  
KM Abedin ◽  
SFU Farhad ◽  
MR Islam ◽  
Aminul I Talukder ◽  
AFMY Haider
Keyword(s):  
Raman Spectra ◽  
Notch Filter ◽  
Ccd Camera ◽  
Interference Filter ◽  
Spectral Lines ◽  
Quantitative Chemical Analysis ◽  
Laser Raman ◽  
Holographic Notch Filter ◽  
Cooled Ccd ◽  
Anti Stokes

A dispersive laser Raman system was designed and constructed using a helium-neon (He-Ne) laser as an excitation source, and an interference filter in the reflection mode for Raleigh filtering instead of the more common holographic notch filter. A commercially available spectrograph equipped with a cooled CCD camera was used to acquire the Raman spectra. The constructed laser Raman spectrograph was found to have excellent performance and sensitivity. Stokes Raman spectra of some common chemicals were acquired by the system, and the wavelengths of spectral lines agreed well with the literature values, within experimental error. The useful spectral range of the system is about 200-4000 cm-1. It was also possible to acquire anti-Stokes Raman spectra of one chemical (CCl4) without much difficulty. We hope to use the system for chemical identification of molecules as well as quantitative chemical analysis. To our knowledge, this is the first laser Raman system constructed in Bangladesh. doi: 10.3329/jbas.v32i1.2451 Journal of Bangladesh Academy of Sciences, Vol. 32, No. 1, 121-129, 2008

The Interpretation of Line Profiles

1977 ◽  
Vol 36 ◽  
pp. 191-215
Author(s):  
G.B. Rybicki
Keyword(s):  
Magnetic Fields ◽  
Atomic Physics ◽  
Velocity Fields ◽  
Spectral Lines ◽  
Inhomogeneous Structure ◽  
The Sun ◽  
Line Profiles ◽  
Physical Phenomena

Observations of the shapes and intensities of spectral lines provide a bounty of information about the outer layers of the sun. In order to utilize this information, however, one is faced with a seemingly monumental task. The sun’s chromosphere and corona are extremely complex, and the underlying physical phenomena are far from being understood. Velocity fields, magnetic fields, Inhomogeneous structure, hydromagnetic phenomena – these are some of the complications that must be faced. Other uncertainties involve the atomic physics upon which all of the deductions depend.

Current Status of Solid-State X-Ray Systems

1985 ◽  
Vol 43 ◽  
pp. 158-161
Author(s):  
Martin Peckerar ◽  
Anastasios Tousimis
Keyword(s):  
Solid State ◽  
Electric Fields ◽  
Spectral Lines ◽  
Current Status ◽  
Mobile Charge ◽  
Electron Hole ◽  
X Ray ◽  
Sensing Systems ◽  
Transmission Electron ◽  
Electron Microscopes

Solid state x-ray sensing systems have been used for many years in conjunction with scanning and transmission electron microscopes. Such systems conveniently provide users with elemental area maps and quantitative chemical analyses of samples. Improvements on these tools are currently sought in the following areas: sensitivity at longer and shorter x-ray wavelengths and minimization of noise-broadening of spectral lines. In this paper, we review basic limitations and recent advances in each of these areas. Throughout the review, we emphasize the systems nature of the problem. That is. limitations exist not only in the sensor elements but also in the preamplifier/amplifier chain and in the interfaces between these components.Solid state x-ray sensors usually function by way of incident photons creating electron-hole pairs in semiconductor material. This radiation-produced mobile charge is swept into external circuitry by electric fields in the semiconductor bulk.

Single Crystal Raman Spectra of the Phase Transition in KTCNQ

1982 ◽  
Vol 85 (1) ◽  
pp. 297-303 ◽  
Author(s):  
A. D. Bandrauk ◽  
K. D. Truong ◽  
S. Jandl
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Raman Spectra
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