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Energy spike generation and quenching processesin ion bombardment induced amorphizationof solids

Carter, G., Armour, D. G., Donnelly, S. E. and Webb, R. (1978) Energy spike generation and quenching processesin ion bombardment induced amorphizationof solids. Radiation Effects, 36 (1-2). pp. 1-13. ISSN 0033-7579

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A detailed analysis of generation and potential recrystallization of amorphous zones resulting from ion irradiation of solid materials is given. The criterion for generation of such spikes is considered to be that sufficient energy is deposited locally to induce melting. Subsequently the heated zone is considered to cool via unperturbed thermal diffusion from an initial temperature distribution of Gaussian form, although the expected ellipsoidal geometry is idealized to spherical symmetry for analytical convenience. Recrystallization is considered to occur via a thermally activated process during spike quenching and criteria for crystallization at both zone boundaries and centres are deduced. These criteria are shown to correspond well to earlier analyses, but other parameters such as substrate temperature and energy deposition density are found to be of considerable importance. Suggestions for more accurate modelling are also examined.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Computing and Engineering > Electron Microscopy and Materials Analysis
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Depositing User: Graeme Greaves
Date Deposited: 02 Oct 2013 07:59
Last Modified: 02 Oct 2013 07:59


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