TITLE

Time domain modeling of spectral collapse in high density molecular gases

AUTHOR(S)
Meinrenken, Christoph J.; Gillespie, Walter D.; Macheret, Sergey; Lempert, Walter R.; Miles, Richard B.
PUB. DATE
May 1997
SOURCE
Journal of Chemical Physics;5/22/1997, Vol. 106 Issue 20, p8299
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Presents a time domain model that describes collisional broadening and narrowing phenomena without requiring sudden approximation. Spectral interference in collisionally perturbed molecular spectra; Monte Carlo type sampling process used to quantify the temporal autocorrelation of the molecular dipole moment; Spectrum obtained numerically via fast Fourier transform.
ACCESSION #
4222438

 

Related Articles

  • Emission by collisional H[sub 2]-He pairs at temperature from 2 to 20 kK. Hammer, Dominik; Frommhold, Lothar; Meyer, Wilfried // Journal of Chemical Physics;10/8/1999, Vol. 111 Issue 14, p6283 

    Studies the dipole surface of hydrogen-helium collisional pairs. Ab initio induced dipoles; Hydrogen-helium interaction potential; Zeroth spectral moments; Spectral density for absorption.

  • Spinning Dust Emission from Wobbling Grains: Important Physical Effects and Implications. Hoang, Thiem; Lazarian, A. // Advances in Astronomy;2012, p1 

    We review the major progress on the modeling of electric dipole emission from rapidly spinning tiny dust grains, including polycyclic aromatic hydrocarbons (PAHs). We begin by summarizing the original model of spinning dust proposed by Draine and Lazarian and recent theoretical results improving...

  • Can long-range collision-induced properties be modeled semi-classically? Bancewicz, Tadeusz // AIP Conference Proceedings;Dec2012, Vol. 1504 Issue 1, p176 

    The collision-induced (CI) dipole moment, the CI polarizability and the CI hyperpolarizability are discussed for the H2-Ar pair and the H2-He one. The symmetry-adapted components of these CI properties are calculated and discussed. Analytical, multipolar long-range behavior of these CI...

  • A New Mathematical Model for a Thin Electric Dipole. Klyuev, S. B.; Matveev, I. V.; Neganov, V. A.; Nefedov, E. I. // Doklady Physics;Feb2002, Vol. 47 Issue 2, p121 

    Details a mathematical model for a thin electric dipole. Design parameters of thin electric dipoles generally calculated by solving the Pocklington and Harrington integro-differential equations; Using the model for the analysis of superhigh-frequency and extremely high-frequency strip-slotted...

  • Dipoles induced by long-range interactions between centrosymmetric linear molecules: Theory and numerical results for H2···H2, H2···N2, and N2···N2. Bohr, J. E.; Hunt, K. L. C. // Journal of Chemical Physics;10/1/1987, Vol. 87 Issue 7, p3821 

    We have derived symmetry-adapted expressions for the dipole moments of pairs of D∞h molecules interacting at long range, in a form useful for line shape analyses of collision-induced rototranslational spectra. Our results are complete to order R-7 in the intermolecular separation R. In...

  • Focusing and selecting the linear type HBr–N[sub 2]O by using a 2 m long electrostatic hexapole field. Okano, A.; Ohoyama, H.; Kasai, T. // Journal of Chemical Physics;1/22/2002, Vol. 116 Issue 4, p1325 

    Focusing and selecting the HBr–N[sub 2]O cluster beam was performed by using a 2 m long electrostatic hexapole field. The observed focusing curve shows a clear evidence that the linear type HBr–N[sub 2]O isomer which has symmetry of symmetric top was preferentially detected in the...

  • Vorticity dynamics of a dipole colliding with a no-slip wall. Kramer, W.; Clercx, H. J. H.; van Heijst, G. J. F. // Physics of Fluids;Dec2007, Vol. 19 Issue 12, p126603 

    The active role of vorticity in the collision of a Lamb-like dipole with a no-slip wall is studied for Re values ranging between 625 and 20000. The initial approach of the dipole does not differ from the stress-free case or from a point-vortex model that incorporates the diffusive growth of the...

  • Dipoles induced by van der Waals interactions during collisions of atoms with heteroatoms or with centrosymmetric linear molecules. Bohr, J. E.; Hunt, K. L. C. // Journal of Chemical Physics;5/15/1987, Vol. 86 Issue 10, p5441 

    Using a reaction field model, we have derived symmetry-adapted expressions for the van der Waals dipoles of atom–heteroatom and atom-D∞h molecule pairs, with nonoverlapping charge distributions.The leading van der Waals contributions vary as R-7 in the intermolecular separation R and...

  • Phase memory effects in probe-field spectroscopy of two-level systems at low collision frequencies. Parkhomenko, A. I.; Shalagin, A. M. // Journal of Experimental & Theoretical Physics;Mar2006, Vol. 102 Issue 3, p406 

    The absorption (amplification) spectrum of a weak probe field by two-level atoms located in a strong resonant laser field and colliding with buffer-gas atoms is analyzed theoretically. The analysis is performed for low collision frequencies compared to the Doppler absorption linewidth (low gas...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics