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Inhibition and quenching effect on positronium formation in metal salt doped polymer blend

  • S. D. Praveena*
  • , V. Ravindrachary
  • , I. Ismayil
  • , R. F. Bhajantri
  • , A. Harisha
  • , B. Guruswamy
  • , Shreedatta Hegde
  • , Rohan N. Sagar
  • *Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Sodium Bromide (NaBr) doped PVA/PVP (50:50) polymer blend composites were prepared using solution casting technique. Pure PVA/PVP blend and PVA/PVP:NaBr composites were studied using XRD and Positron Annihilation Lifetime Spectroscopy (PALS). XRD study shows increase in amorphous nature of the blend due to the NaBr dopant and PALS studies reveal that the o-Ps lifetime (τ3) and intensity (I3) decreases with increase in NaBr doping level. This shows chemical quenching and inhibition process of positronium (Ps) formation in the composite. Here the electron acceptor (Br-) acts as a strong chemical quencher for positronium formation and same is understood based on the spur model.

    Original languageEnglish
    Title of host publicationDAE Solid State Physics Symposium 2017
    EditorsAmitabh Das, Surendra Singh, Arup Biswas
    PublisherAmerican Institute of Physics Inc.
    Volume1942
    ISBN (Electronic)9780735416345
    DOIs
    Publication statusPublished - 10-04-2018
    Event62nd DAE Solid State Physics Symposium 2017 - Anushaktinagar, Mumbai, India
    Duration: 26-12-201730-12-2017

    Publication series

    NameAIP Conference Proceedings
    Volume1942
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Conference

    Conference62nd DAE Solid State Physics Symposium 2017
    Country/TerritoryIndia
    CityAnushaktinagar, Mumbai
    Period26-12-1730-12-17

    All Science Journal Classification (ASJC) codes

    • General Physics and Astronomy

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