Simulating radiation damage cascades in graphite
Molecular dynamics simulation is used to study radiation damage cascades in graphite. High statistical precision is obtained by sampling a wide energy range (100-2500 eV) and a large number of initial directions of the primary knock-on atom. Chemical bonding is described using the Environment Depend...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier Ltd
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/8429 |
| _version_ | 1848745656210948096 |
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| author | Christie, H. Robinson, M. Roach, D. Ross, D. Suarez-Martinez, I. Marks, Nigel |
| author_facet | Christie, H. Robinson, M. Roach, D. Ross, D. Suarez-Martinez, I. Marks, Nigel |
| author_sort | Christie, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Molecular dynamics simulation is used to study radiation damage cascades in graphite. High statistical precision is obtained by sampling a wide energy range (100-2500 eV) and a large number of initial directions of the primary knock-on atom. Chemical bonding is described using the Environment Dependent Interaction Potential for carbon. Graphite is found to exhibit a radiation response distinct from metals and oxides primarily due to the absence of a thermal spike which results in point defects and disconnected regions of damage. Other unique attributes include exceedingly short cascade lifetimes and fractal like atomic trajectories. Unusually for a solid, the binary collision approximation is useful across a wide energy range, and as a consequence residual damage is consistent with the Kinchin-Pease model. The simulations are in agreement with known experimental data and help to clarify substantial uncertainty in the literature regarding the extent of the cascade and the associated damage. |
| first_indexed | 2025-11-14T06:20:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-8429 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:20:49Z |
| publishDate | 2015 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-84292017-09-13T14:38:33Z Simulating radiation damage cascades in graphite Christie, H. Robinson, M. Roach, D. Ross, D. Suarez-Martinez, I. Marks, Nigel Molecular dynamics simulation is used to study radiation damage cascades in graphite. High statistical precision is obtained by sampling a wide energy range (100-2500 eV) and a large number of initial directions of the primary knock-on atom. Chemical bonding is described using the Environment Dependent Interaction Potential for carbon. Graphite is found to exhibit a radiation response distinct from metals and oxides primarily due to the absence of a thermal spike which results in point defects and disconnected regions of damage. Other unique attributes include exceedingly short cascade lifetimes and fractal like atomic trajectories. Unusually for a solid, the binary collision approximation is useful across a wide energy range, and as a consequence residual damage is consistent with the Kinchin-Pease model. The simulations are in agreement with known experimental data and help to clarify substantial uncertainty in the literature regarding the extent of the cascade and the associated damage. 2015 Journal Article http://hdl.handle.net/20.500.11937/8429 10.1016/j.carbon.2014.09.031 Elsevier Ltd fulltext |
| spellingShingle | Christie, H. Robinson, M. Roach, D. Ross, D. Suarez-Martinez, I. Marks, Nigel Simulating radiation damage cascades in graphite |
| title | Simulating radiation damage cascades in graphite |
| title_full | Simulating radiation damage cascades in graphite |
| title_fullStr | Simulating radiation damage cascades in graphite |
| title_full_unstemmed | Simulating radiation damage cascades in graphite |
| title_short | Simulating radiation damage cascades in graphite |
| title_sort | simulating radiation damage cascades in graphite |
| url | http://hdl.handle.net/20.500.11937/8429 |