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Title: Fragmentation of displacement cascades into subcascades: A molecular dynamics study

Abstract

The fragmentation of displacement cascades into subcascades in copper and iron has been investigated through the molecular dynamics technique. A two-point density correlation function has been used to analyze the cascades as a function of the primary knock-on (PKA) energy. This approach is used as a tool for detecting subcascade formation. The fragmentation can already be identified at the end of the ballistic phase. Its resulting evolution in the peak damage state discriminates between unconnected and connected subcascades. The damage zone at the end of the ballistic phase is the precursor of the extended regions that contain the surviving defects. A fractal analysis of the cascade exhibits a dependence on both the stage of the cascade development and the PKA energy. This type of analysis enables the minimum and maximum displacement spike energies together with the subcascade formation threshold energy to be determined. (C) 2014 Elsevier B.V. All rights reserved.

Authors:
 [1];  [2];  [2];  [3];  [4]
+ Show Author Affiliations
  1. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France)
  2. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France); Centre National de la Recherche Scientifique (CNRS), Malabry (France)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  4. Ecole Polytechnique Federale Palaiseau (France). Lab of Irradiated Solids
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1336576
Alternate Identifier(s):
OSTI ID: 1252372
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 458; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Antoshchenkova, E., Luneville, L., Simeone, D., Stoller, R. E., and Hayoun, M. Fragmentation of displacement cascades into subcascades: A molecular dynamics study. United States: N. p., 2014. Web. doi:10.1016/j.jnucmat.2014.12.025.
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Antoshchenkova, E., Luneville, L., Simeone, D., Stoller, R. E., & Hayoun, M. Fragmentation of displacement cascades into subcascades: A molecular dynamics study. United States. https://doi.org/10.1016/j.jnucmat.2014.12.025
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Antoshchenkova, E., Luneville, L., Simeone, D., Stoller, R. E., and Hayoun, M. Fri . "Fragmentation of displacement cascades into subcascades: A molecular dynamics study". United States. https://doi.org/10.1016/j.jnucmat.2014.12.025. https://www.osti.gov/servlets/purl/1336576.
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@article{osti_1336576,
title = {Fragmentation of displacement cascades into subcascades: A molecular dynamics study},
author = {Antoshchenkova, E. and Luneville, L. and Simeone, D. and Stoller, R. E. and Hayoun, M.},
abstractNote = {The fragmentation of displacement cascades into subcascades in copper and iron has been investigated through the molecular dynamics technique. A two-point density correlation function has been used to analyze the cascades as a function of the primary knock-on (PKA) energy. This approach is used as a tool for detecting subcascade formation. The fragmentation can already be identified at the end of the ballistic phase. Its resulting evolution in the peak damage state discriminates between unconnected and connected subcascades. The damage zone at the end of the ballistic phase is the precursor of the extended regions that contain the surviving defects. A fractal analysis of the cascade exhibits a dependence on both the stage of the cascade development and the PKA energy. This type of analysis enables the minimum and maximum displacement spike energies together with the subcascade formation threshold energy to be determined. (C) 2014 Elsevier B.V. All rights reserved.},
doi = {10.1016/j.jnucmat.2014.12.025},
journal = {Journal of Nuclear Materials},
number = C,
volume = 458,
place = {United States},
year = {Fri Dec 12 00:00:00 EST 2014},
month = {Fri Dec 12 00:00:00 EST 2014}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1016/j.jnucmat.2014.12.025
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Citation Metrics:
Cited by: 13 works
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Figures / Tables:

Figure 1 Figure 1: Mean value of the number of defects (Frenkel pairs) as a function of the MD PKA energy. Peak damage state: copper, grey circles; copper from [19], black circles; iron from [34], open circles. Final state: copper, grey triangles; copper from [20, 35], black triangles; iron, open triangles. Endmore » of the ballistic stage: copper, grey squares.« less
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    Works referencing / citing this record:

    Approach to local thermodynamic equilibrium and the evolution to a glassy core following neutron/ion radiation impact
    journal, August 2018

    Fractal analysis of collision cascades in pulsed-ion-beam-irradiated solids
    journal, December 2017

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      Figures / Tables found in this record:

      Figure 1 (p. 15)figure
      Figure 2 (p. 16)figure
      Figure 3 (p. 17)figure
      Figure 4 (p. 18)figure
      Figure 5 (p. 19)figure
      Figure 6 (p. 20)figure
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      Figure 11 (p. 25)figure
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