Pressure-broadening cross sections of multiplet-.SIGMA. molecules: oxygen-noble gas mixtures

1984 ◽  
Vol 88 (10) ◽  
pp. 2031-2036 ◽  
Author(s):  
G. C. Corey ◽  
F. R. McCourt ◽  
W. K. Liu
Keyword(s):  
Cross Sections ◽  
Noble Gas ◽  
Gas Mixtures ◽  
Pressure Broadening

The pressure broadening of the depolarized rayleigh line in N2-noble-gas mixtures

Physica ◽  
1974 ◽  
Vol 76 (3) ◽  
pp. 577-584 ◽  
Author(s):  
R.A.J. Keijser ◽  
K.D. Van Den Hout ◽  
H.F.P. Knaap
Keyword(s):  
Noble Gas ◽  
Gas Mixtures ◽  
Rayleigh Line ◽  
Pressure Broadening

Disorientation of Cs(62P1/2) atoms, induced in collisions with noble gases

1976 ◽  
Vol 54 (7) ◽  
pp. 748-752 ◽  
Author(s):  
B. Niewitecka ◽  
L. Krause
Keyword(s):  
Cross Sections ◽  
Noble Gas ◽  
Zero Magnetic Field ◽  
Zero Field ◽  
Buffer Gas ◽  
Resonance Fluorescence ◽  
Circularly Polarized ◽  
Low Field ◽  
Good Agreement ◽  
Gas Pressures

The disorientation of 62P1/2 cesium atoms, induced in collisions with noble gas atoms in their ground states, was systematically investigated by monitoring the depolarization of cesium resonance fluorescence in relation to noble gas pressures. The Cs atoms, contained together with a buffer gas in a fluorescence cell and located in zero magnetic field, were excited and oriented by irradiation with circularly polarized 8943 Å resonance radiation, and the resonance fluorescence, emitted in an approximately backward direction, was analyzed with respect to circular polarization. The experiments yielded the following disorientation cross sections which have been corrected for the effects of nuclear spin: Cs–He: 4.9 ± 0.7 Å2; Cs–Ne: 2.1 ± 0.3 Å2; Cs–Ar: 5.6 ± 0.8 Å2; Cs–Kr: 5.8 ± 0.9 Å2; Cs–Xe: 6.3 ± 0.9 Å2. The results are in good agreement with most of the available zero-field and low-field data.

Flow birefringence in binary para hydrogen-noble gas mixtures

1985 ◽  
Vol 130 (3) ◽  
pp. 490-504 ◽  
Author(s):  
H. van Houten ◽  
F. Baas ◽  
P.M.J. Marée ◽  
J.J.M. Beenakker
Keyword(s):  
Noble Gas ◽  
Gas Mixtures ◽  
Flow Birefringence ◽  
Para Hydrogen

Collisional cooling of the NO-He system The pressure broadening cross sections between 4·3 and 1·8 K

1989 ◽  
Vol 67 (2) ◽  
pp. 455-463 ◽  
Author(s):  
Daniel R. Willey ◽  
D.N. Bittner ◽  
Frank C. De Lucia
Keyword(s):  
Cross Sections ◽  
Pressure Broadening ◽  
Collisional Cooling

scholarly journals Validation of spectroscopic gas analyzer accuracy using gravimetric standard gas mixtures: Impact of background gas composition on CO<sub>2</sub> quantitation by cavity ring-down spectroscopy

2017 ◽  
Author(s):  
Jeong Sik Lim ◽  
Miyeon Park ◽  
Jinbok Lee ◽  
Jeongsoon Lee
Keyword(s):  
Ambient Air ◽  
Gas Mixtures ◽  
Gas Composition ◽  
Optical Intensity ◽  
Negative Deviation ◽  
Gas Analyzer ◽  
Pressure Broadening ◽  
Background Gas ◽  
Standard Gas Mixtures ◽  
Cavity Ring Down

Abstract. Effect of background gas composition on the measurement of CO2 levels was investigated by wavelength-scanned cavity ring-down spectrometry (WS-CRDS) employing a spectral line centered at the R(1) of the (3 0° 1)III ← (0 0 0) band. For this purpose, eight cylinders with various gas compositions were gravimetrically and manometrically prepared within 2σ = 0.1 %, and these gas mixtures were introduced into the WS-CRDS analyzer calibrated against standards of ambient air composition. Depending on the gas composition, deviations between CRDS-determined and gravimetrically (or manometrically) assigned CO2 concentrations ranged from −9.77 to 5.36 μmol/mol, e.g., excess N2 exhibited a negative deviation, whereas excess Ar showed a positive one. The total pressure broadening coefficients (TBPCs) obtained from the composition of N2, O2 and Ar thoroughly corrected the deviations up to −0.5–0.6 μmol/mol, while these values were −0.43–1.43 μmol/mol considering PBCs induced by only N2. The use of TBPCs enhanced deviations to be corrected to ~ 0.15 %. Furthermore, the above correction linearly shifted CRDS responses for a wide extent of TPBCs ranging from 0.065 to 0.081 cm−1 atm−1. Thus, accurate measurements using optical intensity-based techniques such as WS-CRDS require TBPC-based instrument calibration.

Experimental and theoretical CO2–Ar pressure-broadening cross sections and their temperature dependence

2001 ◽  
Vol 3 (18) ◽  
pp. 3924-3933 ◽  
Author(s):  
F. Thibault ◽  
B. Calil ◽  
J. Buldyreva ◽  
M. Chrysos ◽  
J.-M. Hartmann ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Cross Sections ◽  
Pressure Broadening
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