Monte Carlo simulation of kinetic electron emission from metal due to impact of heavy ions

A Monte Carlo simulation is performed for study of the dependence of kineti c electron emission on nuclear charge of projectile Z(1), using the nonline ar response theory with the density-functional (DF) formalism to calculate electron excitation cross section. The kinetic yield, energy distribution, excitation depth distribution and emission statistics of emitted electrons showed clear Z(1) oscillations, however, the Z(1) oscillations of them are different from that of the inelastic stopping power, in particular for high Z(1), due to large elastic energy loss of the ions and secondary cascade p rocess of primary excited electrons within the solid. For high Z(1), the li near relationship does not exist between them and the inelastic stopping po wer, although they are closely related to it. The emission of high-energy p rimary electrons excited by the ion within shallow depth without experienci ng the secondary cascade process, results in the Z(1) dependence in the ene rgy distribution, excitation depth distribution and emission statistics of emitted electrons. (C) 1999 Elsevier Science B.V. All rights reserved.