Direct observation of mono-vacancy and self-interstitial recovery in tungsten

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dc.contributor University of Helsinki, Materials Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Materials Physics en
dc.contributor University of Helsinki, Materials Physics en
dc.contributor University of Helsinki, Aalto University en
dc.contributor.author Heikinheimo, J.
dc.contributor.author Mizohata, K.
dc.contributor.author Räisänen, J.
dc.contributor.author Ahlgren, T.
dc.contributor.author Jalkanen, P.
dc.contributor.author Lahtinen, A.
dc.contributor.author Catarino, N.
dc.contributor.author Alves, E.
dc.contributor.author Tuomisto, Filip
dc.date.accessioned 2019-03-26T09:38:01Z
dc.date.available 2019-03-26T09:38:01Z
dc.date.issued 2019-02
dc.identifier.citation Heikinheimo , J , Mizohata , K , Räisänen , J , Ahlgren , T , Jalkanen , P , Lahtinen , A , Catarino , N , Alves , E & Tuomisto , F 2019 , ' Direct observation of mono-vacancy and self-interstitial recovery in tungsten ' , Physical Review Materials , vol. 7 , no. 2 , 021103 . https://doi.org/10.1063/1.5082150 en
dc.identifier.issn 2166-532X
dc.identifier.other PURE: 123528646
dc.identifier.other PURE UUID: 06754f55-acc6-4a7b-acfd-d6e4e2cae266
dc.identifier.other WOS: 000460030300007
dc.identifier.other Scopus: 85061630944
dc.identifier.other ORCID: /0000-0003-1703-2247/work/55882676
dc.identifier.other ORCID: /0000-0002-0174-8366/work/55883411
dc.identifier.other ORCID: /0000-0002-0213-7305/work/55883413
dc.identifier.other ORCID: /0000-0002-6913-5654/work/64002431
dc.identifier.uri http://hdl.handle.net/10138/300408
dc.description.abstract Reliable and accurate knowledge of the physical properties of elementary point defects is crucial for predictive modeling of the evolution of radiation damage in materials employed in harsh conditions. We have applied positron annihilation spectroscopy to directly detect mono-vacancy defects created in tungsten through particle irradiation at cryogenic temperatures, as well as their recovery kinetics. We find that efficient self-healing of the primary damage takes place through Frenkel pair recombination already at 35 K, in line with an upper bound of 0.1 eV for the migration barrier of self-interstitials. Further self-interstitial migration is observed above 50 K with activation energies in the range of 0.12-0.42 eV through the release of the self-interstitial atoms from impurities and structural defects and following recombination with mono-vacancies. Mono-vacancy migration is activated at around 550 K with a migration barrier of E-m(V) = 1.85 +/- 0.05 eV. (C) 2019 Author(s). en
dc.format.extent 5
dc.language.iso eng
dc.relation.ispartof Physical Review Materials
dc.rights en
dc.subject IRRADIATION-INDUCED DEFECTS en
dc.subject POSITRON-ANNIHILATION en
dc.subject MIGRATION en
dc.subject BEHAVIOR en
dc.subject ENERGY en
dc.subject ATOMS en
dc.subject 114 Physical sciences en
dc.title Direct observation of mono-vacancy and self-interstitial recovery in tungsten en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1063/1.5082150
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
dc.contributor.pbl
dc.contributor.pbl

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