Line Shapes in Infrared Absorption by Solids and by Atomic or Molecular Species Embedded in Solids

2010 ◽  
Vol 114 (27) ◽  
pp. 7353-7358 ◽  
Author(s):  
Miguel Lagos ◽  
Felipe A. Asenjo ◽  
Roberto Hauyón ◽  
Denisse Pastén ◽  
Pablo S. Moya
Keyword(s):  
Infrared Absorption ◽  
Molecular Species ◽  
Line Shapes

Free-jet infrared absorption spectroscopy of stable and unstable molecular species

1988 ◽  
Vol 86 ◽  
pp. 1 ◽  
Author(s):  
Michio Takami ◽  
Yasuhiro Ohshima ◽  
Satoshi Yamamoto ◽  
Yoshiyasu Matsumoto
Keyword(s):  
Absorption Spectroscopy ◽  
Infrared Absorption ◽  
Molecular Species ◽  
Infrared Absorption Spectroscopy ◽  
Free Jet

Collision-induced far infrared absorption in gaseous chlorine and chlorine–argon mixtures

1990 ◽  
Vol 68 (1) ◽  
pp. 121-127 ◽  
Author(s):  
I. R. Dagg ◽  
A. Anderson ◽  
M. C. Mooney ◽  
C. G. Joslin ◽  
W. Smith ◽  
...  
Keyword(s):  
Information Theory ◽  
Spectral Line ◽  
Infrared Absorption ◽  
Spectral Region ◽  
Room Temperature ◽  
Far Infrared ◽  
Multipole Moments ◽  
Gaseous Mixtures ◽  
Line Shapes ◽  
Lennard Jones

Collision-induced absorption is reported in Cl2 and Cl2–Ar gaseous mixtures at room temperature, in the spectral region below 120 cm−1. The results are analyzed according to existing theory, which incorporates estimates of the quadrupole and hexadecapole moments as well as relying on the accuracy of reported Lennard–Jones parameters. In addition, the spectral line shapes are compared with those calculated from information theory for which the theoretical expressions are given for multipole moments. The results for the mixtures are consistent with the generally accepted value of the quadrupole moment, 3.23(±.16) × 10−26 esu (3.23(+.16) Buckingham), and with a theoretical value of the hexadecapole moment, 31.4 × 10−42 esu. If these values of the moments are assumed, the Lennard–Jones parameters of Cl2, are estimated to be σ = 4.20 Å and ε/k = 307 K.

Line shapes of narrow optical bands: Infrared absorption byUcenters and heavier impurities in alkali halides

2008 ◽  
Vol 77 (10) ◽  
Author(s):  
Miguel Lagos ◽  
Felipe Asenjo ◽  
Roberto Hauyón ◽  
Denisse Pastén ◽  
Hernán González ◽  
...  
Keyword(s):  
Infrared Absorption ◽  
Alkali Halides ◽  
Line Shapes

scholarly journals A Simulation Study of the Far-Infrared Absorption Spectra of HCl Diluted in Liquid Ar

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
A. Padilla ◽  
J. Pérez
Keyword(s):  
Infrared Absorption ◽  
High Frequency ◽  
Ad Hoc ◽  
Far Infrared ◽  
Rotational Spectra ◽  
Line Shapes ◽  
Thermodynamic Conditions ◽  
Spectral Profiles ◽  
Classical Quantum ◽  
Fitting Parameters

The far-infrared absorption coefficient of HCl diluted in liquid Ar has been calculated by using a mixed classical-quantum stochastic simulation approach. The simulated spectra have been compared with the available experimental data at different thermodynamic conditions without using ad hoc fitting parameters. Despite the fact that some discrepancies can be observed in the high frequency side of the far-infrared bands, a reasonable agreement has been found between the theoretical and the experimental spectral profiles. Both, classical and quantum simulated line shapes were comparatively analyzed, determining the time scales involved in the rotational spectra.

On the role of molecular clustering on infrared absorption line shapes of acetylene in a supersonic expansion

2008 ◽  
Vol 463 (4-6) ◽  
pp. 345-348 ◽  
Author(s):  
K. Didriche ◽  
C. Lauzin ◽  
P. Macko ◽  
W.J. Lafferty ◽  
R.J. Saykally ◽  
...  
Keyword(s):  
Absorption Line ◽  
Infrared Absorption ◽  
Supersonic Expansion ◽  
Line Shapes ◽  
Molecular Clustering
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