Optically stimulated luminescence has been demonstrated within a fluoride phosphate glass optical fibre. These fibres have been used as the basis of a novel dosimeter architecture whereby the optical fibre acts as both the sensing and light guiding component. Fibres were fabricated from a commercially acquired glass and irradiated using a 90Sr/90Y source. Following optical stimulation with a 532 nm laser, optically stimulated luminescence of 483 ± 18 cnts/g/μJ was detected. In addition to OSL, scintillation of 6155 ± 78 cnts/s was also measured. A linear response between 0.16 - 2 Gy of irradiation was measured, after which the intensity was observed to plateau. These results indicate the potential suitability of fluoride phosphate optical fibres for radiation sensing applications.Christopher A. G. Kalnins, Heike Ebendorff-Heidepriem, Nigel A. Spooner and Tanya M. Monr

Andersen

Beierholm

Chen

Ebendorff-Heidepriem

Evans

Fernandez

Huston

Kalnins

Marrone

O’Keeffe

Pagonis

Pappalaro

Polf

Tanyi

Optical Materials Express

Christopher A. G. Kalnins

Heike Ebendorff-Heidepriem

Nigel A. Spooner

Tanya M. Monro

Crossref

Optically stimulated luminescence in fluoride phosphate glass optical fibres for radiation dosimetry

Optically stimulated luminescence (OSL) was studied in undoped and rare-earth doped fluoride–phosphate glass. Following exposure to 90Sr/90Y b-radiation, the samples demonstrated strong OSL in the 350–600 nm wavelength range. Here, we explore the effects of fabrication conditions and rare-earth dopants on the OSL. We found that the OSL intensity increases linearly with radiation dosage, indicating the suitability of fluoride–phosphate glass as a dosimeter material.Christopher A. G. Kalnins, Heike Ebendorff-Heidepriem, Nigel A. Spooner and Tanya M. Monr

Kalnins, C.

Ebendorff-Heidepriem, H.

Spooner, N.

Monro, T.

Adelaide Research & Scholarship

Journal of the American Ceramic Society

Optically stimulated luminescence in fluoride-phosphate glass for radiation dosimetry

Extent: 6p.A novel approach to distributed radiation dosimetry is presented. Our approach uses optically stimulated luminescence in optical fibres to detect ionising radiation. This system is unique in that the optically stimulated luminescence mechanism occurs within the optical fibre itself, which then guides the resulting optical signal to a detector. Fluoride phosphate glass was identified as a suitable material, showing a strong optically stimulated luminescence response to ionising radiation. Optical fibres were fabricated from this glass and radiation-detection measurements performed. Radiation exposure was performed with a 90Sr/ 90Y beta source, optical stimulation was provided by a 532nm, 25mW diode laser. The luminescence signal was isolated using two Corning 7-59 filters and detected with an EMI 9635 QA photomultiplier tube. Detection of optically stimulated luminescence produced within the optical fibres is demonstrated. A relationship is shown between the intensity of the luminescence signal, and the applied radiation exposure. The optical fibres are shown to have a consistent response after repeated radiation exposures of 1380.5 ± 37.2 counts/sec. This demonstrates the capacity of the fibres to provide continuous and real-time detection. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).Christopher A. G. Kalnins, Heike Ebendorff-Heidepriem, Nigel A. Spooner, Tanya M. Monr