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Titolo:
Monte Carlo simulation of point-defect behavior in cascade
Autore:
Morioka, T; Morishita, K; Sekimura, N;
Indirizzi:
Univ Tokyo, Dept Quantum Engn & Syst Sci, Bunkyo Ku, Tokyo 1138656, Japan Univ Tokyo Tokyo Japan 1138656 Syst Sci, Bunkyo Ku, Tokyo 1138656, Japan Kyushu Univ, Appl Mech Res Inst, Kasuga, Fukuoka 8168580, Japan Kyushu Univ Kasuga Fukuoka Japan 8168580 , Kasuga, Fukuoka 8168580, Japan
Titolo Testata:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
fascicolo: 1-4, volume: 153, anno: 1999,
pagine: 130 - 135
SICI:
0168-583X(199906)153:1-4<130:MCSOPB>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISPLACEMENT CASCADES; MOLECULAR-DYNAMICS; ALPHA-IRON; METALS; INTERSTITIALS; IRRADIATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Morioka, T Univ Tokyo, Dept Quantum Engn & Syst Sci, Bunkyo Ku, Tokyo 1138656, Japan Univ Tokyo Tokyo Japan 1138656 unkyo Ku, Tokyo 1138656, Japan
Citazione:
T. Morioka et al., "Monte Carlo simulation of point-defect behavior in cascade", NUCL INST B, 153(1-4), 1999, pp. 130-135

Abstract

Fraction of point defects produced after quenching stage of cascade damagewill escape from the cascade region as freely migrating defects (FMD). Theprocess was simulated using Monte Carlo method. The FMD production ratio, recombination ratio and clustering efficiency were estimated in alpha-iron at 290 degrees C as a function of PKA energy. Ln case of single cascade, vacancies tended to form clusters at the center of the cascade, while about 80% of self, interstitial atoms (SIAs) escaped from the cascade region as FMDs. This difference caused the imbalance in the production between freely migrating interstitials and vacancies. As for the annihilation of point defects by recombination, the recombination ratio was not sensitive to the cascade size and defect density in it, and the value was about 20% in all calculations. Preexisting defect clusters around the cascade are affected by theimbalance between SIAs and vacancies. SIA clusters were observed to grow absorbing freely migrating SIAs while vacancy clusters shrank because of SIA-dominant environment which was due to the imbalance in production of FMDs. Quantitative estimation of this cascade overlap effect was investigated tocompare with experimental results. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 04/04/20 alle ore 08:54:02