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Theoretical transition probabilities between the lowest 2S, 2P and 2D states of Na, K, Rb and CsTheoretical transition probabilities between the lowest 2S, 2P and 2D states of the alkali atoms Na through Cs have been computed using near Hartree-Fock quality Slater basis sets. The important core-valence correlation effects are incorporated explicitly by a configuration-interaction procedure. For Cs, the calculations were repeated using a Gaussian basis set so that relativistic effects could be incorporated through an effective core potential procedure. The best calculated electric quadrupole Einstein coefficients are Na(196.3/s), K(103.6/s), Rb(72.4/s) and Cs(19.7/s). Core-valence effects become increasingly important down the column, and reduce the quadrupole transition strengths to about the same degree as for the 2P-2S and 2D-2P dipole-allowed transitions. Relativistic effects increase the quadrupole moment of Cs, but less so than in Ba, presumably because the alkali 2D states are more diffuse.
Document ID
19850040225
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Langhoff, S. R.
(NASA Ames Research Center Moffett Field, CA, United States)
Bauschlicher, C. W., Jr.
(NASA Ames Research Center Moffett Field, CA, United States)
Partridge, H.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 14, 1985
Publication Information
Publication: Journal of Physics B - Atomic and Molecular Physics
Volume: 18
ISSN: 0022-3700
Subject Category
Atomic And Molecular Physics
Accession Number
85A22376
Distribution Limits
Public
Copyright
Other

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