1. The Velocity Distribution of Pickup He+ Measured at 3.0 AU By Messenger Gershman, Daniel J.; Fisk, Lennard A.; Gloeckler, George; Raines, Jim M.; Slavin, James A.; Zurbuchen, Thomas H.; Solomon, Sean C. 2014 Articles Helium ionsAstrophysicsInterstellar matterGeophysics
2. Variational Calculations of the 2³S State of Helium Traub, Joseph F. 1958 Articles Helium ionsElectron configurationChemistry--Mathematical models