Fe
iron atom, 5D ground state
Species tag 056516
Version1*
Date of EntryAug. 2010
ContributorH. S. P. Müller

The energy levels of atomic iron have been determined with high accuracy from extensive mid-IR, visible, and UV measurements in
(1) G. Nave, S. Johansson, R. C. M. Learner, A. P. Thorne, and J. W. Brault, 1994, Astrophys. J. Suppl. Ser. 94, 221.
The two lowest energy, highest frequency transitions were derived from these data. The frequencies of the two highest energy, lowest frequency components were determined by laser magnetic resonance in
(2) J. M. Brown and K. M. Evenson, 1995, Astrophys. J. 441, L97.
The Einstein A values were taken from (2).
Lines Listed4
Frequency / GHz< 12470
Max. J4
log STR0-4.0
log STR1-4.0
Isotope Corr.-0.0374
Egy / cm–10.0
 µa / D 
 µb / D 
 µc / D 
 A / MHz 
 B / MHz 
 C / MHz 
 Q(2000.)19.2813
 Q(1000.)15.7442
 Q(500.0)12.0673
 Q(300.0)10.1747
 Q(225.0)9.5574
 Q(150.0)9.1361
 Q(75.00)9.0024
 Q(37.50)9.0000
 Q(18.75)9.0000
 Q(9.375)9.0000
 Q(5.000)9.0000
 Q(2.725)9.0000
detected in ISM/CSMno

Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schlöder