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dc.contributor.authorLaitinen, Mikko
dc.contributor.authorRiihimäki, Iiro
dc.contributor.authorEkman, Jörgen
dc.contributor.authorSagari A.R. , Ananda
dc.contributor.authorKarlsson, L.B.
dc.contributor.authorSangyuenyongpipat, Somjai
dc.contributor.authorGorelick, Sergey
dc.contributor.authorKettunen, Heikki
dc.contributor.authorPenttilä, Heikki
dc.contributor.authorHellborg, R.
dc.contributor.authorSajavaara, Timo
dc.contributor.authorHelgesson, J.
dc.contributor.authorWhitlow, Harry
dc.date.accessioned2015-02-12T10:12:23Z
dc.date.available2015-02-12T10:12:23Z
dc.date.issued2008
dc.identifier.citationLaitinen, M., Riihimäki, I., Ekman, J., Sagari A.R., A., Karlsson, L., Sangyuenyongpipat, S., Gorelick, S., Kettunen, H., Penttilä, H., Hellborg, R., Sajavaara, T., Helgesson, J., & Whitlow, H. (2008). Mobility determination of lead isotopes in glass for retrospective radon measurements rad. <i>Prot. Dos.</i>, (131), 212.
dc.identifier.otherCONVID_18529277
dc.identifier.otherTUTKAID_34684
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/45300
dc.description.abstractIn retrospective radon measurements, the 22-y half life of 210Pb is used as an advantage. 210Pb is often considered to be relatively immobile in glass after alpha recoil implanted by 222Rn progenies. The diffusion of 210Pb could, however, lead to uncertain wrong retrospective radon exposure estimations if 210Pb is mobile and can escape from glass, or lost as a result of cleaning-induced surface modification. This diffusion was studied by a radiotracer technique, where 209Pb was used as a tracer in a glass matrix for which the elemental composition is known. Using the ion guide isotope separator on-line technique, the 209Pb atoms were implanted into the glass with an energy of 39 keV. The diffusion profiles and the diffusion coefficients were determined after annealing at 470–620°C and serial sectioning by ion sputtering. In addition, the effect of surface cleaning on diffusion was tested. From the Arrhenius fit, the activation enthalpy (H) was determined, which is equal to 3.2 ± 0.2 eV, and also the pre-exponential factor D0, in the order of 20 m2s−1. This result confirms the assumption that over a time period of 50 y 209Pb (and 210Pb) is effectively immobile in the glass. The boundary condition obtained from the measurements had the characteristic of a sink, implying loss of 209Pb in the topmost surface at high temperatures.
dc.language.isoeng
dc.publisherOxford University Press
dc.relation.ispartofseriesProt. Dos.
dc.subject.othermobility determinationen
dc.subject.otherlead isotopesen
dc.subject.otherradon measurementsen
dc.titleMobility determination of lead isotopes in glass for retrospective radon measurements rad
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201501211156
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2015-01-21T16:30:06Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.format.pagerange212
dc.relation.issn0144-8420
dc.relation.numberinseries131
dc.type.versionacceptedVersion
dc.rights.copyright© Oxford University Press.
dc.rights.accesslevelopenAccessfi
dc.relation.doi10.1093/rpd/ncn162


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