| 
|  | Ref. ID |  |  |  | Reference |  | 
|---|
 |  |  
|  |  |  |  |  |  |  |  | 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.universite-paris-saclay.fr/Data/Database/. |  |  |  |  | G67 | A. Giachetti, J. Opt. Soc. Am. 57, 728 (1967). |  |  |  |  | S74 | J. Sugar, J. Chem. Phys. 60, 4103 (1974). |  |  |  |  |