4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
Paper Review: Initial screening in progress
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Thermoluminescence investigation of Sm3+ activated NaSrBO3 phosphors for gamma dosimetry.

Presented by Dr. Ankush Kumar BEDYAL on 5 Jul 2016 from 16:10 to 18:00
Type: Poster Presentation
Track: Track A - Division for Physics of Condensed Matter and Materials
Board #: A.057

Abstract

Thermoluminescence characteristics of Sm<sup>3+</sup> activated NaSrBO<sub>3</sub> phosphors synthesized by solid state method and combustion method have been studied. The phosphors were investigated for their crystal structure using powder X-ray diffraction. A Thermoluminescence (TL) study was carried out after exposing the samples to γ-radiation in the range of 0.01-5 kGy. The TL glow curves exhibited a prominent peak at a lower temperature 402 K and a small hump at 466 K for the samples synthesized by combustion method whereas the glow peaks position shifted towards higher temperature for the samples synthesized by solid state method. The intensity of the peaks raised with the increase in the dose of the gamma rays (0.01–5 kGy). The TL intensity has also improved when synthesis by combustion method. The phosphors exhibited sublinear TL response to gamma-radiation over a wide range of gamma doses (0.01–5 kGy). To analyze the glow curves the TLanal program was used at different doses (0.2–5 kGy). In addition to this, the trapping parameters of all the samples were also calculated using Chen's peak shape method.

Award

Yes

Level

PhD

Supervisor

H. C. Swart,Department of Physics, UFS, P.O. Box 339, Bloemfontein, ZA9300, South Africa (email:swarthc@ufs.ac.za)

Paper

Yes

Permission

Yes

Place

Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room:


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