Molecular dynamics studies of the primary state of radiation damage

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This paper summarizes recent progress in the understanding of energetic displacement cascades in metals achieved with the molecular-dynamics (MD) simulation technique. Recoil events with primary-knock-on-atom (PKA) energies up to 5 keV were simulated in Cu and Ni. The initial development of displacement cascades was similar in both metals, with replacement collision sequences providing the most efficient mechanism for the separation of interstitials and vacancies. The thermal-spike behavior in these metals, however, is quite different; Cu cascades are characterized by lower defect production and greater atomic disordering than those in Ni. The thermal spike significantly influences various other properties of cascades, ... continued below

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Pages: 26

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Diaz de la Rubia, T.; Averback, R. S.; Robertson, I. M. & Benedek, R. December 1988.

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Description

This paper summarizes recent progress in the understanding of energetic displacement cascades in metals achieved with the molecular-dynamics (MD) simulation technique. Recoil events with primary-knock-on-atom (PKA) energies up to 5 keV were simulated in Cu and Ni. The initial development of displacement cascades was similar in both metals, with replacement collision sequences providing the most efficient mechanism for the separation of interstitials and vacancies. The thermal-spike behavior in these metals, however, is quite different; Cu cascades are characterized by lower defect production and greater atomic disordering than those in Ni. The thermal spike significantly influences various other properties of cascades, such as total defect production and defect clustering. 32 refs., 7 figs., 2 tabs.

Physical Description

Pages: 26

Notes

NTIS, PC A03/MF A01 - OSTI; 1.

Source

  • Workshop on the effects of recoil spectrum and nuclear transmutation on the evolution of the microstructure, Lugano, Switzerland, 24 Mar 1988

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  • Other: DE89004196
  • Report No.: CONF-880378-2
  • Grant Number: W-31109-ENG-38
  • Grant Number: AC02-76ER01198
  • Office of Scientific & Technical Information Report Number: 6825157
  • Archival Resource Key: ark:/67531/metadc1185160

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Office of Scientific & Technical Information Technical Reports

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  • December 1988

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  • July 2, 2018, 10:52 p.m.

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  • Oct. 1, 2018, 5:07 p.m.

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Diaz de la Rubia, T.; Averback, R. S.; Robertson, I. M. & Benedek, R. Molecular dynamics studies of the primary state of radiation damage, article, December 1988; United States. (digital.library.unt.edu/ark:/67531/metadc1185160/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.