Study of collisional broadening in oxygen lines by high-resolution coherent anti-Stokes Raman spectroscopy

1987 ◽  
Vol 65 (12) ◽  
pp. 1588-1593 ◽  
Author(s):  
Y. Ouazzany ◽  
J. P. Boquillon ◽  
B. Lavorel
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Least Squares ◽  
Room Temperature ◽  
Spectral Quality ◽  
Branch Line ◽  
Collisional Broadening ◽  
Line Widths ◽  
Anti Stokes ◽  
Very High

The Q-branch line widths of oxygen were measured by using high resolution coherent anti-Stokes Raman spectroscopy. The first nine transitions (N = 1–17) were recorded at pressures from 0.094 to 1 atm (1 atm = 101 kPa) at room temperature. The transitions were excited by injection-locked flashlamp-pumped dye lasers of very high spectral quality. A least squares program was employed to fit calculated spectra to experimental spectra by adjusting different parameters. The collisional broadening coefficients obtained were consistent with available Raman data.

scholarly journals New Trends in Raman Spectroscopy: From High-Resolution Geochemistry to Planetary Exploration

Elements ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 117-122 ◽  
Author(s):  
Olivier Beyssac
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Raman Signal ◽  
Time Resolved ◽  
The Earth ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Anti Stokes ◽  
Near Future ◽  
Very High

This article reviews nonconventional Raman spectroscopy techniques and discusses present and future applications of these techniques in the Earth and planetary sciences. Time-resolved spectroscopy opens new ways to limit or exploit luminescence effects, whereas techniques based on coherent anti-Stokes Raman scattering (CARS) or surface-enhanced Raman spectroscopy (SERS) allow the Raman signal to be considerably enhanced even down to very high spatial resolutions. In addition, compact portable Raman spectrometers are now routinely used out of the laboratory and are even integrated to two rovers going to Mars in the near future.

Evaluation of Very High Resolution Multi-Wavelength Raman Spectroscopy for In-Line Characterization of Patterned Epitaxial Si1-xGex Layers on Si(100) Wafers

2019 ◽  
Vol 35 (2) ◽  
pp. 205-212 ◽  
Author(s):  
Victor Vartanian ◽  
Takeshi Ueda ◽  
Toshikazu Ishigaki ◽  
Kitaek Kang ◽  
Woo Sik Yoo
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Multi Wavelength ◽  
Very High

Étude des bandes infrarouges en résonance 2ν2, ν2 + ν5, , , 2ν3 + ν5 et 4ν3 du chlorure de méthyle

1982 ◽  
Vol 60 (6) ◽  
pp. 825-843 ◽  
Author(s):  
Najath Binsari-Zizi ◽  
Claude Alamichel ◽  
Guy Guelachvili
Keyword(s):  
Fourier Transform ◽  
Standard Deviation ◽  
High Resolution ◽  
Least Squares ◽  
Methyl Chloride ◽  
Coupling Model ◽  
Fermi Resonance ◽  
Simplified Model ◽  
Interaction Scheme ◽  
Very High

The spectrum of methyl chloride has been analyzed between 2650 and 2950 cm−1 from Fourier transform recordings obtained with a very high resolution. More than 3000 lines of CH335Cl and more than 1500 lines of CH337Cl, most of them belonging to ν2 + ν5 and [Formula: see text], have been assigned: the 2ν2, [Formula: see text], 4ν3 and 2ν3 + ν5 bands are very weak and only appear when there are level crossings. The main interaction is the Coriolis resonance between the ν2 and ν5 modes, which links the rovibrational levels six by six. The Fermi resonance between [Formula: see text] and ν1, whose existence has just been shown, does not seem to have important consequences. Numerous other resonances, particularly making the 4ν3 and 2ν3 + ν5 bands visible, must be added to the basic coupling model; they make the general interaction scheme extremely complex. A least squares calculation, according to a simplified model, has given a standard deviation of 0.029 cm−1 over 784 lines of CH337Cl, from which crossings and locally perturbed subbands were excluded.

Very high resolution detection of gamma radiation at room-temperature using p-i-n detectors of CdZnTe and HgCdTe

1994 ◽  
Vol 41 (4) ◽  
pp. 989-992 ◽  
Author(s):  
W.J. Hamilton ◽  
D.R. Rhiger ◽  
S. Sen ◽  
M.H. Kalisher ◽  
K. James ◽  
...  
Keyword(s):  
High Resolution ◽  
Gamma Radiation ◽  
Room Temperature ◽  
Very High

Coherent Anti-Stokes Raman Spectroscopy of the Stretching Vibrations of the Water Isotopomers

1992 ◽  
Vol 46 (7) ◽  
pp. 1149-1155 ◽  
Author(s):  
D. David ◽  
A. Strugano ◽  
I. Bar ◽  
S. Rosenwaks
Keyword(s):  
Raman Spectroscopy ◽  
Gas Phase ◽  
Room Temperature ◽  
Population Distribution ◽  
Calculated Spectrum ◽  
Moderate Resolution ◽  
Stretching Vibrations ◽  
Rotational Transitions ◽  
Anti Stokes ◽  
First Time

Coherent anti-Stokes Raman spectroscopy (CARS) has been employed to study the v1 band of H2O, v1 band of DzO, and v1 and v3 bands of HOD in the gas phase at room temperature and at moderate resolution. These molecules are characterized by a complicated spectrum which is not completely rotationally resolved. A method for the deconvolution of incompletely resolved CARS spectra has been utilized, in which a Boltzmann population distribution is assumed. The calculated spectrum nearly exactly reproduces the observed spectrum and allows assignment of the rotational transitions which are observed in the spectra. All the transitions that appear in these spectra belong to the isotropic Q branches. The CARS spectra of D2O and HOD are studied here for the first time.

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