Strongly Coupled Nonequilibrium Nanoplasma Generated by a Fast Single Ion in Solids

Abstract

A plasma model for relaxation of a medium in heavy ion tracks in condensed matter is proposed. The model is based on three assumptions: the Maxwell distribution of plasma electrons, localization of plasma inside the track nanochannel, and constant values of the plasma electron density and temperature during the X-ray irradiation. It is demonstrated that the plasma relaxation model adequately describes the X-ray spectra observed upon interaction of a fast ion with condensed target. Preassumptions of plasma relaxation model are validated by the molecular dynamics modeling and simulation.

Mass spectrometric study of fast heavy-ion induced products on microdroplet surfaces

“…An ion track has a cylindrical configuration that consists of a track core with a diameter of approximately 0.1 nm and a surrounding region called the penumbra with a diameter of several nm [34]. Multiple ionization of molecules forms a high-energy region in the track core [35][36][37], while secondary electrons are spread over the penumbra. The secondary electrons randomly interact with molecules in the penumbra [38], and molecular damage can be induced during the penetration and deceleration of secondary electrons.…”