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

Abstract :

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 SF6(ν1)+N2(ν1) 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.

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https://hal.univ-angers.fr/hal-03027824
Contributeur : Okina Université d'Angers <>
Soumis le : lundi 24 mai 2021 - 18:33:38
Dernière modification le : lundi 31 mai 2021 - 15:36:54

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chrysos2010.pdf
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Michel Chrysos, I.-A. Verzhbitskiy. Evidence for an isotropic signature in double vibrational collision-induced Raman scattering: A point-polarizable molecule model. Physical Review A, American Physical Society 2010, 81 (4), pp.042705. ⟨10.1103/PhysRevA.81.042705⟩. ⟨hal-03027824⟩

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