KFU. Card publication. Low temperature positron annihilation study of B+-ion implanted PMMA

KAZAN
FEDERAL UNIVERSITY

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LOW TEMPERATURE POSITRON ANNIHILATION STUDY OF B+-ION IMPLANTED PMMA

Form of presentation

Articles in Russian journals and collections

Year of publication

2014

Язык

русский

Authors, employees of KFU

Osin Yuriy Nikolaevich, author

Stepanov Andrey Lvovich, author

Bibliographic description in the original language

T.S. Kavetskyy, V.M. Tsmots, S.Ya. Voloshanska, O. Šauša, V.I. Nuzhdin, V.F. Valeev, Y.N. Osin, and A.L. Stepanov Low temperature positron annihilation study of B+-ion implanted PMMA // Low Temperature Physics - 2014, v. 40, No. 8, pp. 1-5

Annotation

Temperature dependent positron annihilation lifetime spectroscopy (PALS) measurements in the range of 50?300 K are carried out to study positronium formation in 40 keV B+-ion implanted polymethylmethacrylate (B:PMMA) with two ion doses of 3.13?1015 and 3.75?1016 ions/cm2. The investigated samples show the various temperature trends of ortho-positronium (o-Ps) lifetime τ3 and intensity I3 in PMMA before and after ion im-plantation. 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 ob-tained results are compared with room temperature PALS study of PMMA with different molecular weight (Mw) which known from literature. It is found that B+-ion implantation leads to decreasing Mw in PMMA at lower ion dose. At higher ion dose the local destruction of polymeric structure follows to broadening of lifetime distribu-tion (hole size distribution).

Keywords

positron annihilation lifetime spectroscopy, positronium, ion-implantation, polymethylmethacrylate, molecular weight.

The name of the journal

LOW TEMP PHYS+

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=84918&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Osin Yuriy Nikolaevich	ru_RU
dc.contributor.author	Stepanov Andrey Lvovich	ru_RU
dc.date.accessioned	2014-01-01T00:00:00Z	ru_RU
dc.date.available	2014-01-01T00:00:00Z	ru_RU
dc.date.issued	2014	ru_RU
dc.identifier.citation	T.S. Kavetskyy, V.M. Tsmots, S.Ya. Voloshanska, O. Šauša, V.I. Nuzhdin, V.F. Valeev, Y.N. Osin, and A.L. Stepanov Low temperature positron annihilation study of B+-ion implanted PMMA // Low Temperature Physics - 2014, v. 40, No. 8, pp. 1-5	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=84918&p_lang=2	ru_RU
dc.description.abstract	LOW TEMP PHYS+	ru_RU
dc.description.abstract	Temperature dependent positron annihilation lifetime spectroscopy (PALS) measurements in the range of 50?300 K are carried out to study positronium formation in 40 keV B+-ion implanted polymethylmethacrylate (B:PMMA) with two ion doses of 3.13?1015 and 3.75?1016 ions/cm2. The investigated samples show the various temperature trends of ortho-positronium (o-Ps) lifetime τ3 and intensity I3 in PMMA before and after ion im-plantation. 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 ob-tained results are compared with room temperature PALS study of PMMA with different molecular weight (Mw) which known from literature. It is found that B+-ion implantation leads to decreasing Mw in PMMA at lower ion dose. At higher ion dose the local destruction of polymeric structure follows to broadening of lifetime distribu-tion (hole size distribution).	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	positron annihilation lifetime spectroscopy	ru_RU
dc.subject	positronium	ru_RU
dc.subject	ion-implantation	ru_RU
dc.subject	polymethylmethacrylate	ru_RU
dc.subject	molecular weight.	ru_RU
dc.title	Low temperature positron annihilation study of B+-ion implanted PMMA	ru_RU
dc.type	Articles in Russian journals and collections	ru_RU