NDLI: Development of the mini ionization chamber for high dose monitoring on line inside a gamma irradiation facility

Content Provider	IEEE Xplore Digital Library
Author	de A. Rodrigues Jr., A. Vieira, J.M. Hamada, M.M.
Copyright Year	2003
Abstract	A cylindrical ionization chamber of 0.9 cm/sup 3/ has been developed for monitoring high doses on line during the sample irradiation at a static position in a /sup 60/Co gamma industrial plant, with about 25.9 PBq (700 kCi). Nitrogen gas at pressure of 1 bar was utilized to fill the ionization chamber and to determine an appropriate configuration to be used as a detector for high dose measurements. The first detector tests were carried out using a /sup 60/Co Gammacell with about 0.26PBq (7 kCi) and dose rates of 0.6, 1.8 and 2.6 kGy/h. These dose rates were reached with lead absorbers. A good linearity of the detector was found between dose and accumulated charge, independently of the different dose rates caused by lead absorbers. The developed ionization chamber showed suitable to be used as a dosimeter on line for doses between 1 to 6 kGy at a /sup 60/Co Gammacell independently of the spectrum degradation caused by absorbers between 50 to 90%.
Starting Page	406
Ending Page	410
File Size	1994492
Page Count	5
File Format	PDF
ISBN	0780376366
DOI	10.1109/NSSMIC.2002.1239342
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-11-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ionization chambers Monitoring Industrial plants Nitrogen Pressure measurement Gamma ray detection Gamma ray detectors Gas detectors Testing Linearity
Content Type	Text
Resource Type	Article

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