Abstract
Abstract The rate of the energy exchange between electrons and ions in the liquid-like dense collision cascade is derived. It is shown that only the interaction with the collective modes of ion motion may cause the energy dissipation to the electrons and affect the cooling of the energetic displacement cascades. The interaction of valence electrons with collective modes leads to a similar rate of the energy exchange as is obtained for metals at elevated temperatures. This result is reached without the need to postulate the existence of phonons and electron-phonon coupling in thermal spikes.
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