The use of thermal peak model for temperature calculation in two-layer structures along the projected range of high-energy heavy ion

The thermal spike model in the three-dimensional case is used for the calculation of temperatures in the structure consisting of two layers of different materials. The systems of equations for electron gas and lattice temperatures are solved numerically in the axial-symmetric coordinate system at the constant values of specific capacities and thermal conductivities for the Ni(2 μm)/W two-layer system. One can conclude on the basis of the obtained results that phase transitions can take place in the case of irradiation of the Ni(2 μm)/W two-layer structure by Bi ions with an energy of 710 MeV: melting - in both layers, evaporation - only in the Ni layer (first layer). The maximum radii and depths where the melting (Ni and W layers) and evaporation (Ni layer) processes occur are calculated