Fibre Remote Optoelectronic Gamma Dosimetry based on Optically Stimulated Luminescence of Al2O3:C

Optically stimulated luminescence dosimetry (OSL-D) used in conjunction with fiber optics enables a remote measurement of dose, for the purpose of radioprotection in the nuclear industry and in medicine (radiology, radiotherapy). Alumina OSL crystals are used because of their low Z, low fading and o...

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Bibliographic Details
Published in:Radiation protection dosimetry 2002-01, Vol.100 (1-4), p.255-260
Main Authors: Ranchoux, G., Magne, S., P. Bouvet, J., Ferdinand, P.
Format: Article
Language:English
Subjects:
Aluminum Oxide - chemistry
Aluminum Oxide - radiation effects
Biological and medical sciences
Carbon - chemistry
Crystallization
Equipment Design
Fiber Optic Technology
Gamma Rays
Medical sciences
Photons
Radiation Protection - instrumentation
Radiation Protection - methods
Radiation Protection - statistics & numerical data
Radiochemistry
Thermoluminescent Dosimetry - instrumentation
Thermoluminescent Dosimetry - methods
Thermoluminescent Dosimetry - statistics & numerical data
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Description
Summary:Optically stimulated luminescence dosimetry (OSL-D) used in conjunction with fiber optics enables a remote measurement of dose, for the purpose of radioprotection in the nuclear industry and in medicine (radiology, radiotherapy). Alumina OSL crystals are used because of their low Z, low fading and optical transparency which improves the sensitivity. An optoelectronic portable dosemeter has been designed and tested that shows a dose detection of 50 µGy with a 20 meter-long fiber. Following irradiation, all trapped electrons are released under light stimulation while the OSL is integrated to provide dose-equivalent measurements. A compensation technique is designed with the help of the MCNP4b code, so that both angular and photon energy characteristics comply with international standards (CEI 61066) for photon dose equivalent Hp(10). Two sensors are described that allow measurements over a wide solid angle (95% of 4pSr), for photon energies ranging from 15 keV to 3 MeV.
ISSN:0144-8420
1742-3406
DOI:10.1093/oxfordjournals.rpd.a005861