Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...324..344s&link_type=abstract
Astronomy and Astrophysics, v.324, p.344-356
Astronomy and Astrophysics
Astrophysics
34
Polarization, Scattering, Sun: General, Atomic Processes, Radiative Transfer
Scientific paper
Observations of the scattering polarization in the solar spectrum have opened a new window for diagnostics of the Sun. In the present paper a theoretical basis for the interpretation of the linearly polarized spectral structures is developed. It covers the general case of Raman scattering for entire atomic multiplets and includes the quantum interferences between the various possible excited states. Although the formulation allows for the presence of magnetic fields of arbitrary strength and direction, the theory is expressed in explicit form only for the case of zero magnetic field. It is applied to identify and interpret observed spectral signatures of quantum interferences between fine structure and hyperfine structure components, isotope effects, and fluorescence within multiplets.
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