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/
Peterson 1985	J. R. Peterson, Y. K. Bae, and D. L. Huestis, Phys. Rev. Lett. 55, 692-695 (1985) Threshold Behavior near an Electronic Shape Resonance: Analysis of the He(3P) Threshold in He- Photodetachment and Determination of the He(2 3S) Electron Affinity