Dose Reassessment by Using PTTL Method in Ge-Doped SiO2 Optical Fiber Thermoluminescence Dosimetry

Nurul Najua Zulkepely; Siti Nurasiah Mat Nawi; Norfadira Wahib; Yusoff Mohd Amin; Roslan Md Nor; Mohd Jamil Maah; David Andrew Bradley

doi:10.4028/www.scientific.net/AMR.1133.399

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1133Dose Reassessment by Using PTTL Method in Ge-Doped...

Dose Reassessment by Using PTTL Method in Ge-Doped SiO₂ Optical Fiber Thermoluminescence Dosimetry

Abstract:

In this paper we report, the characteristics of PTTL after irradiation with ⁶⁰Co gamma rays as a function UV light exposure wavelength, gamma irradiation dose, and UV light exposure time were determined for Ge-doped SiO₂ optical fibers. The efficiency of dose reassessment for this fiber was compared to standard thermoluminescence detector, TLD100. Experiments show that the method works well with the UV lamp of 254 nm within region of doses between 3 to 50 Gy, but could be applied for higher and lower doses as well. The effect of exposure time of UV radiation on the PTTL signal was studied from 5 to 120 minutes to determine the highest sensitivity and the limit of the dose. The efficiency of dose reassessment with 10 Gy of gamma irradiation expose to UV light for 15 minutes relative to PTTL values of about 27.0% and 2.3% for Ge-doped SiO₂ optical fiber and TLD100.

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Periodical:

Advanced Materials Research (Volume 1133)

Pages:

399-403

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1133.399

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Online since:

January 2016

Authors:

Nurul Najua Zulkepely*, Siti Nurasiah Mat Nawi, Norfadira Wahib, Yusoff Mohd Amin, Roslan Md Nor, Mohd Jamil Maah, David Andrew Bradley

Keywords:

Ge-Doped SiO₂ Optical Fiber, Photo-Transferred Thermoluminescence (PTTL), Thermoluminescence, TLD100, Ultraviolet (UV)

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