Chapter

Astrophysical lasers on the Fe II lines

Vladilen Letokhov and Sveneric Johansson

in Astrophysical Lasers

Published in print December 2008 | ISBN: 9780199548279
Published online May 2009 | e-ISBN: 9780191720512 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199548279.003.0011
 Astrophysical lasers on the Fe II lines

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This chapter describes a Fe II astrophysical laser. Topics covered include radiative excitation and relaxation of Fe II levels, spectral peculiarities in Fe II, population inversion and amplification in Fe II transitions, radiative cycling with stimulated emission, effective temperature of Lyα from radiative cycle, sources of Lyα radiation pumping of Fe II in the Weigelt blobs, and Andromeda spectral puzzle.

Keywords: Fe II astrophysical laser; radiative excitation; relaxation; radiative cycle

Chapter.  11072 words.  Illustrated.

Subjects: Atomic, Molecular, and Optical Physics

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