Reference Label	Details
Sansonetti 2005	J. E. Sansonetti and W. C. Martin, J. Phys. Chem. Ref. Data 34, 1559-2259 (2005) Handbook of Basic Atomic Spectroscopic Data Web: http://physics.nist.gov/PhysRefData/Handbook/
Walter 1994	C. W. Walter, J. A. Seifert, and J. R. Peterson, Phys. Rev. A 50, 2257-2262 (1994) Reexamination of the He- 1s2p2 4Pe Shape Resonance: Details of its Properties and a Precise Electron Affinity for He 2 3S 10.1103/PhysRevA.50.2257