Zarkadoula, E; Duffy, DM; Nordlund, K; Seaton, MA; Todorov, IT; Weber, WJ; Trachenko, K; (2015) Electronic effects in high-energy radiation damage in tungsten. Journal of Physics: Condensed Matter , 27 (13) , Article 135401. 10.1088/0953-8984/27/13/135401.

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Abstract

Although the effects of the electronic excitations during high-energy radiation damage processes are not currently understood, it is shown that their role in the interaction of radiation with matter is important. We perform molecular dynamics simulations of high-energy collision cascades in bcc-tungsten using the coupled two-temperature molecular dynamics (2T-MD) model that incorporates both the effects of electronic stopping and electron-phonon interaction. We compare the combination of these effects on the induced damage with only the effect of electronic stopping, and conclude in several novel insights. In the 2T-MD model, the electron-phonon coupling results in less damage production in the molten region and in faster relaxation of the damage at short times. These two effects lead to a significantly smaller amount of the final damage at longer times.

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