Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...167..200l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 167, no. 1, Oct. 1986, p. 200-206.
Astronomy and Astrophysics
Astrophysics
11
Graphs (Charts), Magnetic Fields, Polarization (Waves), Resonance Scattering, Zeeman Effect, Larmor Radius, Quantum Numbers, Stokes Law Of Radiation
Scientific paper
Resonance scattering in a two-level atom is affected by the presence of very weak magnetic fields when the Zeeman splitting is comparable with the radiative broadening of the lower level due to absorption. This phenomenon, called here the "lower level Hanle effect", is analyzed in some detail for several atomic transitions and the corresponding polarization diagrams are drawn. It is suggested that this effect could be used in practice for the diagnostic of very weak magnetic fields in diffuse media by the measurement of the polarization of the scattered radiation in resonance lines.
Landi Degl'Innocenti Egidio
Landolfi Marco
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