Evidence for an isotropic signature in double vibrational collision-induced Raman scattering: A point-polarizable molecule model

Journal Article · Thu Apr 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.042705· OSTI ID:21408621

Chrysos, M; Verzhbitskiy, I A ^[1]

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1. Institut des Sciences et Technologies Moleculaires d'Angers, Moltech Anjou, UMR Centre National de la Recherche Scientifique 6200, Universite d'Angers, 2 Boulevard Lavoisier, F-49045 Angers (France)

The particularly weak isotropic spectrum of the recently reported [Verzhbitskiy et al., Phys. Rev. A 81, 012702 (2010)] nearly depolarized collision-induced Raman scattering band SF{sub 6}({nu}{sub 1})+N{sub 2}({nu}{sub 1}) at room temperature was obtained and is presented here. The spectrum was extracted from high-quality measurements of two independent incident-field polarization scattering components. Its zero-order moment was found to be about 200 times smaller than that of its anisotropic counterpart. Agreement, both in spectral shape and in intensity, was found with predictions based on the dipole-induced dipole polarization model once corrected for the very substantial back-induction, dispersion, and dipole-induced quadrupole-induced dipole interaction mechanisms, all of which were considered within the model framework of two point-polarizable molecules. Quantum-mechanical calculations revealed a large contribution from bound and predissociating dimers that amounts to more than one-third of the total isotropic scattering intensity.

• OSTI ID: 21408621
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANISOTROPY
COLLISIONS
DIMERS
DIPOLES
DISPERSIONS
FORECASTING
MECHANICS
MOLECULES
MULTIPOLES
POLARIZATION
QUANTUM MECHANICS
RAMAN EFFECT
SCATTERING
SPECTRA