Electron emission and energy loss in grazing collisions of protons with insulator surfaces

M.S. GRAVIELLE; I. ALDAZABAL; A. ARNAU; V.H. PONCE; J.E. MIRAGLIA; F. AUMAYR; S. LEDERER; H. WINTER

PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS

The American Physical Society

Lugar: New York; Año: 2007 vol. 76 p. 12904 - 12909

1050-2947

Electron emission from LiF, KCl, and KI crystal surfaces during grazing collisions of swift protons is studied using a first-order distorted-wave formalism. Owing to the localized character of the electronic structure of these surfaces, we propose a model that allows us to describe the process as a sequence of atomic transitions from different target ions. Experimental results are presented for electron emission from LiF and KI and energy loss from KI surfaces. Calculations show reasonable agreement with these experimental data. The role played by the charge of the incident particle is also investigated.