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

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
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

Conference

Conference62nd DAE Solid State Physics Symposium 2017
CountryIndia
CityAnushaktinagar, Mumbai
Period26-12-1730-12-17

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Praveena, S. D., Ravindrachary, V., Ismayil, I., Bhajantri, R. F., Harisha, A., Guruswamy, B., Hegde, S., & Sagar, R. N. (2018). Inhibition and quenching effect on positronium formation in metal salt doped polymer blend. In DAE Solid State Physics Symposium 2017 (Vol. 1942). [080004] American Institute of Physics Inc.. https://doi.org/10.1063/1.5028838