Compilation of wavelengths, energy levels, and transition probabilities for BaI and BaII

Energy levels, wavelengths, and transition probabilities for the first and second spectra of barium, Ba I and Ba II, have been compiled. Wavelengths of observed transitions and energy levels derived from those wavelengths have been obtained from a critical evaluation of the available literature. Measured and calculated transition probabilities for some of the observed transitions have been obtained from the recent compilation of Klose [J. Z. Klose , J. Phys. Chem. Ref. Data 31, 217 (2002)]. (C) 2004 by the U.S. Secretary of Commerce on behalf of the United States. All rights reserved.