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Low-temperature positron annihilation study of B<sup>+</sup>-ion implanted PMMA

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dc.contributor.author Kavetskyy T.
dc.contributor.author Tsmots V.
dc.contributor.author Voloshanska S.
dc.contributor.author Šauša O.
dc.contributor.author Nuzhdin V.
dc.contributor.author Valeev V.
dc.contributor.author Osin Y.
dc.contributor.author Stepanov A.
dc.date.accessioned 2018-09-18T20:15:47Z
dc.date.available 2018-09-18T20:15:47Z
dc.date.issued 2014
dc.identifier.issn 1063-777X
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/138087
dc.description.abstract © 2014 AIP Publishing LLC. Temperature dependent positron annihilation lifetime spectroscopy (PALS) measurements in the range of 50-300K are carried out to study positronium formation in 40 KeV B<sup>+</sup>-ion implanted polymethylmethacrylate (B:PMMA) with two ion doses of 3.13 × 10<sup>15</sup> and 3.75 × 10<sup>16</sup> ions/cm<sup>2</sup>. The investigated samples show the various temperature trends of ortho-positronium (o-Ps) lifetime τ<inf>3</inf> and intensity I<inf>3</inf> in PMMA before and after ion implantation. Two transitions in the vicinity of ~150 and ~250 K, ascribed to γ and β transitions, respectively, are observed in the PMMA and B:PMMA samples in consistent with reference data for pristine sample. The obtained results are compared with room temperature PALS study of PMMA with different molecular weight (Mw) which known from literature. It is found that B<sup>+</sup>-ion implantation leads to decreasing M<inf>w</inf> in PMMA at lower ion dose. At higher ion dose the local destruction of polymeric structure follows to broadening of lifetime distribution (hole size distribution).
dc.relation.ispartofseries Low Temperature Physics
dc.title Low-temperature positron annihilation study of B<sup>+</sup>-ion implanted PMMA
dc.type Article
dc.relation.ispartofseries-issue 8
dc.relation.ispartofseries-volume 40
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 747
dc.source.id SCOPUS1063777X-2014-40-8-SID84930206635


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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