Induced contributions in the Rayleigh band of gaseous H2O
作者:
A. De Santis,
A. Gregori,
期刊:
Molecular Physics
(Taylor Available online 1990)
卷期:
Volume 69,
issue 4
页码: 715-734
ISSN:0026-8976
年代: 1990
DOI:10.1080/00268979000100531
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Isotropic and anisotropic induced contributions in light scattering from water vapour (418–453 K) along the liquid-vapour coexistence curve are studied. The evaluation of the induced effects takes into account the long range interactions described by the first few terms of the polarizability and multipolar series expansion. In performing the configurational averages at low density, different effective potentials in the literature are used and quantum corrections to the classical pair distribution function are considered. The quantum rotational-allowed spectrum is calculated and used to derive reliable intensities and lineshapes of the depolarized induced contributions. The role of the interference between rotational and translational variables (the cross-term) is discussed. The intensity and lineshape of the isotropic contributions are calculated and the theoretical frequency dependence of the depolarization ratio is compared with the experimental one.
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