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Title: Optically stimulated luminescence in doped NaCl

Abstract

NaCl:Ca,Cu,P NaCl:Mg,Cu,P OSL phosphors are synthesized. Intense OSL is observed in these samples which is 14 times more than Al{sub 2}O{sub 3}:C. Same samples coated with PVA (poly vinyl actetae) polymer also show similar OSL properties and these coated samples are found to be less susceptible to the moisture due to protected layer of hydrophobic polymer. These coated samples may be useful as OSL dosimetersdue to high sensitivity and less or no susceptibility to moisture.

Authors:
;  [1]; ;  [2];  [3]
  1. Institute of Science R.T. Road Civil Lines Nagpur (India)
  2. Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, India 2D.S.T Fellow, C/o RPAD, BARC, Mumbai (India)
  3. R.T.M Nagpur University Nagpur (India)
Publication Date:
OSTI Identifier:
22606562
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1728; Journal Issue: 1; Conference: ICC 2015: International conference on condensed matter and applied physics, Bikaner (India), 30-31 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM OXIDES; CALCIUM ADDITIONS; COPPER ADDITIONS; DOPED MATERIALS; LAYERS; MAGNESIUM ADDITIONS; MOISTURE; PHOSPHORS; PHOSPHORUS ADDITIONS; PHOTOLUMINESCENCE; PVA; SENSITIVITY; SODIUM CHLORIDES

Citation Formats

Gaikwad, S. U., E-mail: gaikwadsonali09@yahoo.com, Patil, R. R., Kulkarni, M. S., Bhatt, B. C., and Moharil, S. V. Optically stimulated luminescence in doped NaCl. United States: N. p., 2016. Web. doi:10.1063/1.4946561.
Gaikwad, S. U., E-mail: gaikwadsonali09@yahoo.com, Patil, R. R., Kulkarni, M. S., Bhatt, B. C., & Moharil, S. V. Optically stimulated luminescence in doped NaCl. United States. doi:10.1063/1.4946561.
Gaikwad, S. U., E-mail: gaikwadsonali09@yahoo.com, Patil, R. R., Kulkarni, M. S., Bhatt, B. C., and Moharil, S. V. 2016. "Optically stimulated luminescence in doped NaCl". United States. doi:10.1063/1.4946561.
@article{osti_22606562,
title = {Optically stimulated luminescence in doped NaCl},
author = {Gaikwad, S. U., E-mail: gaikwadsonali09@yahoo.com and Patil, R. R. and Kulkarni, M. S. and Bhatt, B. C. and Moharil, S. V.},
abstractNote = {NaCl:Ca,Cu,P NaCl:Mg,Cu,P OSL phosphors are synthesized. Intense OSL is observed in these samples which is 14 times more than Al{sub 2}O{sub 3}:C. Same samples coated with PVA (poly vinyl actetae) polymer also show similar OSL properties and these coated samples are found to be less susceptible to the moisture due to protected layer of hydrophobic polymer. These coated samples may be useful as OSL dosimetersdue to high sensitivity and less or no susceptibility to moisture.},
doi = {10.1063/1.4946561},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1728,
place = {United States},
year = 2016,
month = 5
}
  • Introduction and Purpose: Conventional x-ray films and radiochromic films have inherent challenges for high precision radiotherapy dosimetry. Here we have investigated basic characteristics of optically stimulated luminescence (OSL) of irradiated films containing carbon-doped aluminum oxide (Al{sub 2}O{sub 3}:C) for dosimetry in therapeutic photon and electron beams. Materials and Methods: The OSL films consist of a polystyrene sheet, with a top layer of a mixture of single crystals of Al{sub 2}O{sub 3}:C, ground into a powder, and a polyester base. The total thickness of the films is 0.3 mm. Measurements have been performed in a water equivalent phantom, using 4, 6,more » 10, and 18 MV photon beams, and 6-22 MeV electron beams. The studies include assessment of the film response (acquired OSL signal/delivered dose) on delivered dose (linearity), dose rate (1-6 Gy/min), beam quality, field size and depth (6 MV, ranges 4x4-30x30 cm{sup 2}, d{sub max}-35 cm). Doses have been derived from ionization chamber measurements. OSL films have also been compared with conventional x-ray and GafChromic films for dosimetry outside the high dose area, with a high proportion of low dose scattered photons. In total, 787 OSL films have been irradiated. Results: Overall, the OSL response for electron beams was 3.6% lower than for photon beams. Differences between the various electron beam energies were not significant. The 6 and 18 MV photon beams differed in response by 4%. No response dependencies on dose rate were observed. For the 6 MV beam, the field size and depth dependencies of the OSL response were within {+-}2.5%. The observed inter-film response variation for films irradiated with the same dose varied from 1% to 3.2% (1 SD), depending on the measurement day. At a depth of 20 cm, 5 cm outside the 20x20 cm{sup 2} 6 and 18 MV beams, an over response of 17% was observed. In contrast to GafChromic and conventional x-ray films, the response of the Al{sub 2}O{sub 3}:C films is linear in the clinically relevant dose range 0-200 cGy. Conclusions: Measurement of the OSL signal of irradiated films containing Al{sub 2}O{sub 3}:C is a promising technique for film dosimetry in radiotherapy with no or small response variations with dose rate, beam quality, field size and depth, and a linear response from 0 to 200 cGy.« less
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