Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/11624

Title: Simulating radiation damage in Ga stabilised δ-Pu
Authors: Robinson, Marc
Kenny, Steven D.
Smith, Roger
Storr, M.T.
Keywords: Plutonium
Radiation damage
Computer simulations
Issue Date: 2011
Publisher: © Elsevier
Citation: ROBINSON, M. ... et al., 2011. Simulating radiation damage in Ga stabilised δ-Pu. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 269 (21), pp. 2539 - 2548.
Abstract: Radiation events in Ga stablised δ-Pu are investigated by means of Molecular Dynamics simulations. Pu 5 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 trajectories deduced through comprehensive sampling of a representative set of directions, combined with different Ga atomic positions. The displacement threshold energy, Ed, for Pu and Ga atoms was also determined through similar extensive studies to aid the understanding and interpretation of the cascade results. Values of Ed between 5 and 40 eV were determined for Pu, with Ga PKAs requiring generally more energy to create a defect with Ed between 8 and 70 eV. Low energy collision cascades, initiated with energies in the range of 0.4–1 keV, show that the cascades form in a similar manner to other fcc metals with a vacancy rich zone surrounded by isolated interstitial defects. A feature of these cascades is that the displaced Ga atoms return to lattice sites during the ballistic phase, leading to a lack of Ga-type residual defects. Higher energy cascades show similar features but with the development of an amorphous region at the cascade core of around 5 nm diameter at 5 keV. Quantitatively, the residual number of defects found shows no distinct variation to that for previous work on pure Pu, suggesting the inclusion of Ga does not significantly effect the susceptibility or resistance of Pu to initial cascade development.
Description: Simulating Radiation Damage in Ga stabilised delta-Pu was published in the journal, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms [© Elsevier] and the definitive version is available at: http://dx.doi.org/10.1016/j.nimb.2011.07.005
Version: Accepted for publication
DOI: 10.1016/j.nimb.2011.07.005
URI: https://dspace.lboro.ac.uk/2134/11624
Publisher Link: http://dx.doi.org/10.1016/j.nimb.2011.07.005
ISSN: 0168-583X
Appears in Collections:Published Articles (Maths)

Files associated with this item:

File Description SizeFormat
PuGaPaper.pdf3.35 MBAdobe PDFView/Open


SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.