Combined model of the material excitation and relaxation in swift heavy ion tracks

摘要: Abstract A multiscale approach describing material excitation in the nanometric track of a swift heavy ion (SHI) decelerated solid electronic stopping regime is presented. This model consists combination three different methods: (a) Monte Carlo simulations electron subsystem at femtosecond scale due to scatterings SHI and generated fast electrons; (b) molecular-kinetic spatial spreading electrons after finishing ionization cascades up timescales hundred femtoseconds; (c) molecular dynamics reaction lattice on excess energy transferred from relaxing picosecond time scale. The dynamic structure factor (DSF) formalism links together all these methods. It takes into account effects temporal correlations atomic system target during its interaction with excited an track. For LiF crystals good agreement demonstrated between heating estimated experimental data that predicted by model.