Positron localization effects on the Doppler broadening of the annihilation line: Aluminum as a case study

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Calloni, A.
dc.contributor.author Dupasquier, A.
dc.contributor.author Ferragut, R.
dc.contributor.author Folegati, P.
dc.contributor.author Iglesias, M. M.
dc.contributor.author Makkonen, I.
dc.contributor.author Puska, Martti J.
dc.date.accessioned 2015-09-17T09:02:03Z
dc.date.available 2015-09-17T09:02:03Z
dc.date.issued 2005
dc.identifier.citation Calloni, A. & Dupasquier, A. & Ferragut, R. & Folegati, P. & Iglesias, M. M. & Makkonen, I. & Puska, Martti J. 2005. Positron localization effects on the Doppler broadening of the annihilation line: Aluminum as a case study. Physical Review B. Volume 72, Issue 5. 054112/1-6. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.72.054112. en
dc.identifier.issn 1550-235X (electronic)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/17686
dc.description.abstract The coincidence Doppler broadening (CDB) technique is widely used to measure one-dimensional momentum distributions of annihilation photons, with the aim of obtaining information on the chemical environment of open-volume defects. However, the quantitative analysis of CDB spectra needs to include also purely geometrical effects. A demonstration is given here, on the basis of CDB spectra measured in quenched and in deformed pure aluminum. The comparison of the experimental results with ab initio computations shows that the observed differences come from the difference in free volume seen by positrons trapped in quenched-in vacancies or in vacancylike defects associated to dislocations. The computation reproduces accurately all details of CDB spectra, including the peak near the Fermi break, which is due to the zero-point motion of the confined positron. en
dc.format.extent 054112/1-6
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society (APS) en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 72, Issue 5
dc.rights © 2005 American Physical Society (APS). This is the accepted version of the following article: Calloni, A. & Dupasquier, A. & Ferragut, R. & Folegati, P. & Iglesias, M. M. & Makkonen, I. & Puska, Martti J. 2005. Positron localization effects on the Doppler broadening of the annihilation line: Aluminum as a case study. Physical Review B. Volume 72, Issue 5. 054112/1-6. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.72.054112, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.72.054112. en
dc.subject.other Physics en
dc.title Positron localization effects on the Doppler broadening of the annihilation line: Aluminum as a case study en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Physical Society (APS)
dc.contributor.school Perustieteiden korkeakoulu fi
dc.contributor.school School of Science en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.contributor.department Department of Applied Physics en
dc.subject.keyword positron annihilation en
dc.subject.keyword coincidence Doppler broadening technique en
dc.identifier.urn URN:NBN:fi:aalto-201509164292
dc.type.dcmitype text en
dc.identifier.doi 10.1103/physrevb.72.054112
dc.type.version Final published version en


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