Momentum distributions of electron-positron pairs annihilating at vacancy clusters in Si

Simple item page
dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorHakala, M.
dc.contributor.authorPuska, Martti J.
dc.contributor.authorNieminen, Risto M.
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.departmentTeknillisen fysiikan laitosfi
dc.contributor.schoolPerustieteiden korkeakoulufi
dc.contributor.schoolSchool of Scienceen
dc.date.accessioned2015-08-12T09:02:14Z
dc.date.available2015-08-12T09:02:14Z
dc.date.issued1998
dc.description.abstractWe report calculations of momentum densities of electron-positron pairs annihilating at various vacancy clusters in Si. The densities integrated along one direction, i.e., those corresponding to the spectra measured by the two-dimensional angular correlation of the annihilation radiation method, are shown to be isotropic if the positron is captured by a small vacancy cluster. The densities integrated along two directions correspond to the one-dimensional angular-correlation distribution or the Doppler-broadened annihilation radiation line shape. The characteristic narrowing of these one-dimensional distributions at vacancy clusters is demonstrated. The line-shape parameters S and W describing mainly the annihilations with valence and core electrons, respectively, are calculated and compared quantitatively with experimental data. We find a systematic increase in the S and a decrease in the W parameter as the size of the vacancy increases.en
dc.description.versionPeer revieweden
dc.format.extent7621-7627
dc.format.mimetypeapplication/pdfen
dc.identifier.citationHakala, M. & Puska, M. J. & Nieminen, Risto M. 1998. Momentum distributions of electron-positron pairs annihilating at vacancy clusters in Si. Physical Review B. Volume 57, Issue 13. 7621-7627. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.57.7621.en
dc.identifier.doi10.1103/physrevb.57.7621
dc.identifier.issn1550-235X (electronic)
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/17396
dc.identifier.urnURN:NBN:fi:aalto-201508124008
dc.language.isoenen
dc.publisherAmerican Physical Society (APS)en
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseriesVolume 57, Issue 13
dc.rights© 1998 American Physical Society (APS). This is the accepted version of the following article: Hakala, M. & Puska, M. J. & Nieminen, Risto M. 1998. Momentum distributions of electron-positron pairs annihilating at vacancy clusters in Si. Physical Review B. Volume 57, Issue 13. 7621-7627. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.57.7621, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.57.7621.en
dc.rights.holderAmerican Physical Society (APS)
dc.subject.keywordSien
dc.subject.keywordelectron-positron pairsen
dc.subject.otherPhysicsen
dc.titleMomentum distributions of electron-positron pairs annihilating at vacancy clusters in Sien
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.dcmitypetexten
dc.type.versionFinal published versionen
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
A1_hakala_m_1998.pdf
Size:
307.14 KB
Format:
Adobe Portable Document Format
Download
Collections
[article] Perustieteiden korkeakoulu / SCI