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dc.contributor.authorRobinson, Marc
dc.contributor.authorKenny, S.
dc.contributor.authorSmith, R.
dc.contributor.authorStorr, M.
dc.identifier.citationRobinson, M. and Kenny, S. and Smith, R. and Storr, M. 2014. He migration and bubble formation in Ga stabilised delta-Pu. Journal of Nuclear Materials. 444 (1-3): pp. 493-500.

The migration and formation of He into bubbles in Ga stabilised δ-Pu has been investigated using molecular dynamics simulation. Formation energy calculations indicate that isolated He interstitial atoms are unfavourable and that it is preferential for He to reside as a substitutional atom at the expense of producing a Pu self-interstitial. Migration energy barrier calculations and on-the-fly kinetic Monte Carlo simulations support this result establishing that an interstitial He atom soon becomes substitutional, after which migration is unlikely unless assisted by local vacancies. He-vacancy cluster formation energies show that as the void size increases, a He:vacancy ratio up to 2:1 becomes energetically favourable over isolated He substitutional atoms and vacancies.

dc.publisherElsevier BV * North-Holland
dc.titleHe migration and bubble formation in Ga stabilised delta-Pu
dc.typeJournal Article
dcterms.source.titleJournal of Nuclear Materials
curtin.accessStatusOpen access via publisher

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