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

Fingerprint

polymer blends
positronium
quenching
salts
positron annihilation
life (durability)
composite materials
metals
sodium bromides
spectroscopy
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Praveena, S. D., Ravindrachary, V., Ismayil, I., Bhajantri, R. F., Harisha, A., Guruswamy, B., ... 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
Praveena, S. D. ; Ravindrachary, V. ; Ismayil, I. ; Bhajantri, R. F. ; Harisha, A. ; Guruswamy, B. ; Hegde, Shreedatta ; Sagar, Rohan N. / Inhibition and quenching effect on positronium formation in metal salt doped polymer blend. DAE Solid State Physics Symposium 2017. Vol. 1942 American Institute of Physics Inc., 2018.
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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.",
author = "Praveena, {S. D.} and V. Ravindrachary and I. Ismayil and Bhajantri, {R. F.} and A. Harisha and B. Guruswamy and Shreedatta Hegde and Sagar, {Rohan N.}",
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Praveena, SD, Ravindrachary, V, Ismayil, I, Bhajantri, RF, Harisha, A, Guruswamy, B, Hegde, S & Sagar, RN 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., 62nd DAE Solid State Physics Symposium 2017, Anushaktinagar, Mumbai, India, 26-12-17. https://doi.org/10.1063/1.5028838

Inhibition and quenching effect on positronium formation in metal salt doped polymer blend. / Praveena, S. D.; Ravindrachary, V.; Ismayil, I.; Bhajantri, R. F.; Harisha, A.; Guruswamy, B.; Hegde, Shreedatta; Sagar, Rohan N.

DAE Solid State Physics Symposium 2017. Vol. 1942 American Institute of Physics Inc., 2018. 080004.

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

TY - GEN

T1 - Inhibition and quenching effect on positronium formation in metal salt doped polymer blend

AU - Praveena, S. D.

AU - Ravindrachary, V.

AU - Ismayil, I.

AU - Bhajantri, R. F.

AU - Harisha, A.

AU - Guruswamy, B.

AU - Hegde, Shreedatta

AU - Sagar, Rohan N.

PY - 2018/4/10

Y1 - 2018/4/10

N2 - 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.

AB - 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.

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Praveena SD, Ravindrachary V, Ismayil I, Bhajantri RF, Harisha A, Guruswamy B et al. Inhibition and quenching effect on positronium formation in metal salt doped polymer blend. In DAE Solid State Physics Symposium 2017. Vol. 1942. American Institute of Physics Inc. 2018. 080004 https://doi.org/10.1063/1.5028838