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Making tracks in metals

Duffy, DM; Itoh, N; Rutherford, AM; Stoneham, AM; (2008) Making tracks in metals. J PHYS-CONDENS MAT , 20 (8) , Article 082201. 10.1088/0953-8984/20/8/082201. Green open access

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Abstract

Swift heavy ions lose energy primarily by inelastic electronic scattering and, above an energy threshold, electronic losses result in damage to the lattice. Such high energy radiation is beyond the range of validity of traditional cascade simulations, and predictive damage calculations are challenging. We use a novel methodology, which combines molecular dynamics with a consistent treatment of electronic energy transport and redistribution to the lattice, to model how swift heavy ions form damage tracks. We consider a range of material parameters (electron-phonon coupling strength, thermal conductivity and electronic specific heat) and show how these affect the maximum lattice temperature reached and the extent of residual damage. Our analysis also suggests that fission tracks may form in alloys of archaeological interest.

Type: Article
Title: Making tracks in metals
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/0953-8984/20/8/082201
Publisher version: http://dx.doi.org/10.1088/0953-8984/20/8/082201
Language: English
Additional information: Text made available to UCL Discovery by kind permission of IOP Publishing, 2012
Keywords: HIGH ELECTRONIC EXCITATIONS, HEAVY-ION IRRADIATION, PURE METALS, DAMAGE, DYNAMICS
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/77154
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