Coincidence studies of electron emission statistics in ion surface interactions: a new experimental study

Abstract

Electron emission number statistics have been measured for 8 keV H + ions in collisions with clean polycrystalline copper at 80 • and 67 • . Also, in a new development, electron number statistics have been recorded for reflected particles using coincidences between the reflected particles and the emitted electrons. The results of both coincidence and non-coincidence measurements fitted Polya distributions, with a higher mean emission value in the coincidence case. A model has been developed to interpret the difference between the coincidence and non-coincidence electron number statistics.