Simulating radiation damage in Ga stabilised [delta]-Pu
Radiation events in Ga stablised d-Pu are investigated by means of Molecular Dynamics simulations. Pu5 at.% Ga is considered using the Modified Embedded Atom Method to govern the atomic interactions.Cascades were initiated with Primary Knock-on Atom (PKA) energies in the range of 0.4–10 keV, with tr...
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| Format: | Journal Article |
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Elsevier
2011
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0168583X1100632X http://hdl.handle.net/20.500.11937/45824 |
| _version_ | 1848757392163995648 |
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| author | Robinson, Marc Kenny, S. Smith, R. Storr, M. |
| author_facet | Robinson, Marc Kenny, S. Smith, R. Storr, M. |
| author_sort | Robinson, Marc |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Radiation events in Ga stablised d-Pu are investigated by means of Molecular Dynamics simulations. Pu5 at.% Ga is considered using the Modified Embedded Atom Method to govern the atomic interactions.Cascades were initiated with Primary Knock-on Atom (PKA) energies in the range of 0.4–10 keV, with trajectoriesdeduced through comprehensive sampling of a representative set of directions, combined withdifferent Ga atomic positions. The displacement threshold energy, Ed, for Pu and Ga atoms was also determinedthrough similar extensive studies to aid the understanding and interpretation of the cascaderesults.Values of Ed between 5 and 40 eV were determined for Pu, with Ga PKAs requiring generally moreenergy to create a defect with Ed between 8 and 70 eV. Low energy collision cascades, initiated with energiesin the range of 0.4–1 keV, show that the cascades form in a similar manner to other fcc metals with avacancy rich zone surrounded by isolated interstitial defects. A feature of these cascades is that the displacedGa atoms return to lattice sites during the ballistic phase, leading to a lack of Ga-type residualdefects. Higher energy cascades show similar features but with the development of an amorphous regionat the cascade core of around 5 nm diameter at 5 keV. Quantitatively, the residual number of defectsfound shows no distinct variation to that for previous work on pure Pu, suggesting the inclusion of Gadoes not significantly effect the susceptibility or resistance of Pu to initial cascade development. |
| first_indexed | 2025-11-14T09:27:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-45824 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:27:22Z |
| publishDate | 2011 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-458242017-02-28T01:41:48Z Simulating radiation damage in Ga stabilised [delta]-Pu Robinson, Marc Kenny, S. Smith, R. Storr, M. Plutonium - MEAM - Defects - Radiation damage - Computer simulations Radiation events in Ga stablised d-Pu are investigated by means of Molecular Dynamics simulations. Pu5 at.% Ga is considered using the Modified Embedded Atom Method to govern the atomic interactions.Cascades were initiated with Primary Knock-on Atom (PKA) energies in the range of 0.4–10 keV, with trajectoriesdeduced through comprehensive sampling of a representative set of directions, combined withdifferent Ga atomic positions. The displacement threshold energy, Ed, for Pu and Ga atoms was also determinedthrough similar extensive studies to aid the understanding and interpretation of the cascaderesults.Values of Ed between 5 and 40 eV were determined for Pu, with Ga PKAs requiring generally moreenergy to create a defect with Ed between 8 and 70 eV. Low energy collision cascades, initiated with energiesin the range of 0.4–1 keV, show that the cascades form in a similar manner to other fcc metals with avacancy rich zone surrounded by isolated interstitial defects. A feature of these cascades is that the displacedGa atoms return to lattice sites during the ballistic phase, leading to a lack of Ga-type residualdefects. Higher energy cascades show similar features but with the development of an amorphous regionat the cascade core of around 5 nm diameter at 5 keV. Quantitatively, the residual number of defectsfound shows no distinct variation to that for previous work on pure Pu, suggesting the inclusion of Gadoes not significantly effect the susceptibility or resistance of Pu to initial cascade development. 2011 Journal Article http://hdl.handle.net/20.500.11937/45824 http://www.sciencedirect.com/science/article/pii/S0168583X1100632X Elsevier restricted |
| spellingShingle | Plutonium - MEAM - Defects - Radiation damage - Computer simulations Robinson, Marc Kenny, S. Smith, R. Storr, M. Simulating radiation damage in Ga stabilised [delta]-Pu |
| title | Simulating radiation damage in Ga stabilised [delta]-Pu |
| title_full | Simulating radiation damage in Ga stabilised [delta]-Pu |
| title_fullStr | Simulating radiation damage in Ga stabilised [delta]-Pu |
| title_full_unstemmed | Simulating radiation damage in Ga stabilised [delta]-Pu |
| title_short | Simulating radiation damage in Ga stabilised [delta]-Pu |
| title_sort | simulating radiation damage in ga stabilised [delta]-pu |
| topic | Plutonium - MEAM - Defects - Radiation damage - Computer simulations |
| url | http://www.sciencedirect.com/science/article/pii/S0168583X1100632X http://hdl.handle.net/20.500.11937/45824 |