کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1482847 1510485 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Feasibility of radiation dosimetry with phosphorus-doped optical fibers in the ultraviolet and visible domain
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Feasibility of radiation dosimetry with phosphorus-doped optical fibers in the ultraviolet and visible domain
چکیده انگلیسی

We investigated the feasibility of using phosphorus-doped optical fibers to monitor the levels of deposited dose during an irradiation. For this, we characterized their spectral and time dependence of the steady state 10 keV X-ray radiation-induced attenuation in the ultraviolet and visible range of wavelengths (200 nm–900 nm). Their radiation sensitivity is very high with losses exceeding 10 dB m−1 for doses larger than 10 Gy and wavelengths shorter than 550 nm. Our results reveal a sub linear dose dependence of the induced losses that also depends on the dose rate (1 Gy s−1–50 Gy s−1) between 350 nm and 900 nm. For this spectral domain, excess of attenuation is due to the phosphorus oxygen-hole centers. P2 defects are responsible for the induced losses around 300 nm that linearly increase with the dose at least until 1 kGy and without dose rate effect. We measured no noticeable influence of the temperature (5 °C–50 °C) on the radiation-induced attenuation in the studied spectral domain. Our study shows that dosimetry with phosphorus-doped fibers seems possible in the ultraviolet (around 300 nm) with a sensitivity enhanced by a factor > 100 compared to the one observed in the infrared region (> 900 nm).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 357, Issues 8–9, 15 April 2011, Pages 1871–1874
نویسندگان
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