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Astrophysical Lasers$
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Vladilen Letokhov and Sveneric Johansson

Print publication date: 2008

Print ISBN-13: 9780199548279

Published to Oxford Scholarship Online: May 2009

DOI: 10.1093/acprof:oso/9780199548279.001.0001

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Elements of atomic spectroscopy

Elements of atomic spectroscopy

(p.36) 3 Elements of atomic spectroscopy
Astrophysical Lasers

Vladilen Letokhov

Sveneric Johansson

Oxford University Press

This chapter illustrates atomic structures of increasing complexity by using energy level diagrams of atoms or ions, for which fluorescence and natural laser radiation have been proposed. It defines the terminology used in connection with atomic structure, transitions, and various processes due to the spectroscopic language difference between atomic and stellar spectroscopy, which may constitute a barrier in scientific communication between the two fields. To address the two different systems of labelling spectral lines, a compromise is made with the use of LS notation for energy levels and transitions except for those lines which are better known as members of well-known line series, e.g., Lyα, Lyβ, Hα (Balmer α) etc. in hydrogen.

Keywords:   atomic structure, energy level diagrams, atoms, ions, one-electron systems, two-electron systems, complex spectra

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