Incident-angle dependence of ion-induced electron emission from Al & Co films using swift heavy ion

Abstract

The interaction of charged particles with solid surfaces leads to ion induced electron emission (IIEE). The study of emission of electrons has been a subject of interest in the field of ion-solid collisions. In the present experiment we have measured electron emission yields for Al and Co targets as a function of angle of incidence in the range 0°–30° using swift heavy ions. We observed that the inverse cosine law is not followed in case of swift heavy ions. The possible reasons for deviation from inverse cosine law are discussed. The aim of this work is to show how the variation of the electron yield with the angle of ion incidence reveals proportionality between the yield and the amount of the energy deposited in the electronic excitation near the target surface.