Publication:
Statistics of primary radiation defects in pure nickel

Дата
2020
Авторы
Voskoboinikov, R.
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Научные группы
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Аннотация
© 2020 Elsevier B.V.Molecular dynamics simulations were applied to study radiation damage formation in collision cascades initiated by primary knock-on atoms (PKA) with energy EPKA = 5, 10, 15 and 20 keV in pure nickel at temperature T = 100, 300, 600, 900 and 1200 K. A series of 24 collision cascades per EPKA,T set was simulated to assure statistical reliability of the results. The number of Frenkel pairs, NFP, the fraction of vacancies, σvac, and self-interstitials (SIA), σSIA, in point defect clusters, the average size of vacancy and SIA clusters, Nvac and NSIA, respectively, and the average vacancy and SIA cluster per cascade yield, Yvac and YSIA, respectively, were evaluated as functions of EPKA,T. It is found that NFP∝EPKA under all simulated conditions. Both σvac and σSIA demonstrate similar dependence on EPKA. σvac matches Yvac, while σSIA correlates with NSIA and is affected by SIA diffusivity. Nvac is determined by the irradiation temperature and thermal stability of vacancy clusters. They are stable at T ⩽ 300 K and Nvac∝EPKA, whereas at 600 K ⩽ T ⩽ 900 K, Nvac≈6 and 10, which corresponds to the sizes of regular stacking fault tetrahedra. SIA cluster per cascade yield YSIA∝NFP and therefore ∝EPKA under all simulated irradiation conditions.
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Цитирование
Voskoboinikov, R. Statistics of primary radiation defects in pure nickel / Voskoboinikov, R. // Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. - 2020. - 478. - P. 201-204. - 10.1016/j.nimb.2020.06.034
URI
https://www.doi.org/10.1016/j.nimb.2020.06.034
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85087908788&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000564696700010
 https://openrepository.mephi.ru/handle/123456789/22023
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