Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7098
Title: Polarized scattering of light for arbitrary magnetic fields with level-crossings from the combination of hyperfine and fine structure splittings
Authors: Sowmya, K
Nagendra, K. N
Sampoorna, M
Stenflo, J. O
Keywords: Atomic processes
Line: formation
Polarization
Scattering
Sun: magnetic fields
Issue Date: 1-Dec-2015
Publisher: IOP Publishing
Citation: The Astrophysical Journal, Vol. 814, No. 2, 127
Abstract: Interference between magnetic substates of the hyperfine structure states belonging to different fine structure states of the same term influences the polarization for some of the diagnostically important lines of the Sun's spectrum, like the sodium and lithium doublets. The polarization signatures of this combined interference contain information on the properties of the solar magnetic fields. Motivated by this, in the present paper, we study the problem of polarized scattering on a two-term atom with hyperfine structure by accounting for the partial redistribution in the photon frequencies arising due to the Doppler motions of the atoms. We consider the scattering atoms to be under the influence of a magnetic field of arbitrary strength and develop a formalism based on the Kramers–Heisenberg approach to calculate the scattering cross section for this process. We explore the rich polarization effects that arise from various level-crossings in the Paschen–Back regime in a single scattering case using the lithium atomic system as a concrete example that is relevant to the Sun.
Description: Restricted Access © The American Astronomical Society http://dx.doi.org/10.1088/0004-637X/814/2/127
URI: http://prints.iiap.res.in/handle/2248/7098
ISSN: 0004-637X
Appears in Collections:IIAP Publications



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