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

doi:10.1063/1.5028838

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

Department of Physics, Manipal Institute of Technology, Manipal

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	DAE Solid State Physics Symposium 2017
Editors	Amitabh Das, Surendra Singh, Arup Biswas
Publisher	American Institute of Physics Inc.
Volume	1942
ISBN (Electronic)	9780735416345
DOIs	https://doi.org/10.1063/1.5028838
Publication status	Published - 10-04-2018
Event	62nd DAE Solid State Physics Symposium 2017 - Anushaktinagar, Mumbai, India Duration: 26-12-2017 → 30-12-2017

Publication series

Name	AIP Conference Proceedings
Volume	1942
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	62nd DAE Solid State Physics Symposium 2017
Country/Territory	India
City	Anushaktinagar, Mumbai
Period	26-12-17 → 30-12-17

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Access to Document

10.1063/1.5028838

Cite this

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 A. Das, S. Singh, & A. Biswas (Eds.), DAE Solid State Physics Symposium 2017 (Vol. 1942). Article 080004 (AIP Conference Proceedings; Vol. 1942). American Institute of Physics Inc.. https://doi.org/10.1063/1.5028838

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title = "Inhibition and quenching effect on positronium formation in metal salt doped polymer blend",

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.}",

note = "Publisher Copyright: {\textcopyright} 2018 Author(s).; 62nd DAE Solid State Physics Symposium 2017 ; Conference date: 26-12-2017 Through 30-12-2017",

year = "2018",

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day = "10",

doi = "10.1063/1.5028838",

language = "English",

volume = "1942",

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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 A Das, S Singh & A Biswas (eds), DAE Solid State Physics Symposium 2017. vol. 1942, 080004, AIP Conference Proceedings, vol. 1942, 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. et al.
DAE Solid State Physics Symposium 2017. ed. / Amitabh Das; Surendra Singh; Arup Biswas. Vol. 1942 American Institute of Physics Inc., 2018. 080004 (AIP Conference Proceedings; Vol. 1942).

Research output: Chapter in Book/Report/Conference proceeding › Conference 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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M3 - Conference contribution

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VL - 1942

T3 - AIP Conference Proceedings

BT - DAE Solid State Physics Symposium 2017

A2 - Das, Amitabh

A2 - Singh, Surendra

A2 - Biswas, Arup

PB - American Institute of Physics Inc.

T2 - 62nd DAE Solid State Physics Symposium 2017

Y2 - 26 December 2017 through 30 December 2017

ER -

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

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