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Title: Study of the fragmentation of a displacement cascade into subcascades within the Binary Collision Approximation framework

Abstract

When a material is subjected to irradiation, many primary defects are created at the atomic level by sequences of ballistic collision events to form highly disordered regions defined as displacement cascades. The long term evolution of materials under irradiation is dictated by the number and the spatial distribution of the surviving defects in the displacement cascade. The peculiar power law shape of collision cross sections is responsible for the fractal feature of atomic trajectories set and then the fragmentation of a displacement cascade into smaller subcascades. We present a criterion to describe the fragmentation of a displacement cascade into subcascades and to calculate the volume fraction of subcascades in the overall cascade due to this fragmentation. Such a volume fraction then provides a natural framework to estimate the efficiency of different projectiles to induce phase transformation or amorphisation in solids under irradiation. From this definition of the fragmentation of a displacement cascade, this work gives some new insights to compare different irradiations performed with different particles.

Authors:
; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Materials Science of Actinides (MSA)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1386664
DOE Contract Number:  
SC0001089
Resource Type:
Journal Article
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 415; Journal Issue: 1; Related Information: MSA partners with University of Notre Dame (lead); University of California, Davis; Florida State University; George Washington University; University of Michigan; University of Minnesota; Oak Ridge National Laboratory; Oregon state University; Rensselaer Polytechnic Institute; Savannah River National Laboratory; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; nuclear (including radiation effects), materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly)

Citation Formats

Luneville, L., Simeone, D., and Weber, W. J. Study of the fragmentation of a displacement cascade into subcascades within the Binary Collision Approximation framework. United States: N. p., 2011. Web. doi:10.1016/j.jnucmat.2011.05.039.
Luneville, L., Simeone, D., & Weber, W. J. Study of the fragmentation of a displacement cascade into subcascades within the Binary Collision Approximation framework. United States. doi:10.1016/j.jnucmat.2011.05.039.
Luneville, L., Simeone, D., and Weber, W. J. Mon . "Study of the fragmentation of a displacement cascade into subcascades within the Binary Collision Approximation framework". United States. doi:10.1016/j.jnucmat.2011.05.039.
@article{osti_1386664,
title = {Study of the fragmentation of a displacement cascade into subcascades within the Binary Collision Approximation framework},
author = {Luneville, L. and Simeone, D. and Weber, W. J.},
abstractNote = {When a material is subjected to irradiation, many primary defects are created at the atomic level by sequences of ballistic collision events to form highly disordered regions defined as displacement cascades. The long term evolution of materials under irradiation is dictated by the number and the spatial distribution of the surviving defects in the displacement cascade. The peculiar power law shape of collision cross sections is responsible for the fractal feature of atomic trajectories set and then the fragmentation of a displacement cascade into smaller subcascades. We present a criterion to describe the fragmentation of a displacement cascade into subcascades and to calculate the volume fraction of subcascades in the overall cascade due to this fragmentation. Such a volume fraction then provides a natural framework to estimate the efficiency of different projectiles to induce phase transformation or amorphisation in solids under irradiation. From this definition of the fragmentation of a displacement cascade, this work gives some new insights to compare different irradiations performed with different particles.},
doi = {10.1016/j.jnucmat.2011.05.039},
journal = {Journal of Nuclear Materials},
issn = {0022-3115},
number = 1,
volume = 415,
place = {United States},
year = {2011},
month = {8}
}