Wavelengths, Transition Probabilities, and Energy Levels for the Spectrum of Neutral Strontium (Sr I)

Following a critical review of spectroscopic data for neutral strontium (Z=38), the energy levels, with designations and uncertainties, have been tabulated. Wavelengths with classifications, intensities, and transition probabilities have also been reviewed. In addition, the 5s S-2(1/2), 4d D-2(3/2), and 4d D-2(5/2) ionization energies have been listed. A summary of the current state of measurements of the Sr I 5s(2) S-1(0)-5s5p P-3(0)o, F=9/2 atomic clock transition, and other isotopic observations has also been included. (C) 2010 by the U.S. Secretary of Commerce on behalf of the United States. All rights reserved. [doi: 10.1063/1.3449176]