Excitation of helium and polarization of the resulting light induced by collisions with protons and hydrogen atoms (5-35 keV)

van Eck, J., de Heer, F. J., & Kistemaker, J. (1964). Excitation of helium and polarization of the resulting light induced by collisions with protons and hydrogen atoms (5-35 keV). In M. R. C. McDowell (Ed.), Atomic Collision Processes : the Proceedings of the IIIrd International Conference on the Physics of Electronic and Atomic Collisions, London, University College London, 22nd-26th July 1963 (pp. 624–634).