Protactinium (Pa)
References and Notes for Protactinium ( Pa )
BW92b J. Blaise and J.-F. Wyart, Energy Levels and Atomic Spectra of Actinides, International Tables of Selected Constants 20, Paris (1992). Also available at http//www.lac.u.psud.fr/Database/Contents.html.
G67 A. Giachetti, J. Opt. Soc. Am. 57, 728 (1967).
S74 J. Sugar, J. Chem. Phys. 60, 4103 (1974).