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Positron Annihilation Studies of Polyethylene-Carbon Black Composites

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Kostrzewa M., Michno Z., Majcherczyk T.
Acta Physica Polonica A
|
1995
|
vol. 88
|
issue 1
193-198
EN
Results of investigations of the angular correlation of annihilation radiation and positron annihilation lifetime measurements are presented for polyethylene-carbon black composites. The inhibition of positronium formation due to the carbon black introduction is evidenced by a decrease in intensities of the narrow component in angular correlation of annihilation radiation curves and of the longest-lived components in positron annihilation lifetime spectra. A qualitative interpretation of the data in terms of the free-volumes model is proposed.
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