Ion-induced spike effects on metal surfaces

S. E. Donnelly, R. C. Birtcher

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The effects of single Xe ion impacts on the surfaces of Au, Ag, In and Pb have been studied using in-situ transmission electron microscopy. Individual ion impacts produce surface craters with associated expelled material. The cratering efficiency scales with the density of the irradiated metal. Calculation indicates that, when collision cascades occur near surfaces (within about 5nm) with energy densities sufficient to cause local melting, craters will occur. Crater formation occurs as a result of the explosive outflow of material from the hot molten core of the cascade. This would appear to indicate that, although the number of atoms in a spike is small and its duration short, it is reasonable to use macroscopic concepts such as vibrational temperature, melting and flow to describe spike effects.

Original languageEnglish
Pages (from-to)133-145
Number of pages13
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume79
Issue number1
DOIs
Publication statusPublished - 1 Jan 1999
Externally publishedYes

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