Author(s): C. H. Li, C. Tusche, F. O. Schumann, and J. Kirschner
Coincidence electron spectroscopy provides the first evidence that neutralization of an He ion near a metal surface leads to the emission of an electron pair, which in some cases originates from a correlated single step neutralization involving 4 electrons from the metal.
[Phys. Rev. Lett. 118, 136402] Published Wed Mar 29, 2017