Reference Label	Details
Gopalan 2003	A. Gopalan, J. Bömmels, S. Götte, A. Landwehr, K. Franz, M.-W. Ruf, H. Hotop, and K. Bartschat, Eur. Phys. J. D 22, 17-29 (2003) A Novel Electron Scattering Apparatus Combining a Laser Photoelectron Source and a Triply Differentially Pumped Supersonic Beam Target: Characterization and Results for the He- (1s 2s2) Resonance