Perfluoromethylcyclohexane—a chemical dosimeter for the megagray range

The γ-radiolytic formation of perfluorocyclohexane (PFCH) from perfluoromethylcyclohexane (PFMCH), irradiated in small diameter glass ampoules in the presence of air, was investigated over the dose range between 0.1 and 10 MGy. It could be demonstrated that under appropriate analytical conditions th...

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Bibliographic Details
Published in:Radiation physics and chemistry 1984, Vol.23 (5), p.561-569
Main Authors: Gehringer, Peter, Proksch, Emil, Szinovatz, Walter
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Radiation chemistry
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Summary:The γ-radiolytic formation of perfluorocyclohexane (PFCH) from perfluoromethylcyclohexane (PFMCH), irradiated in small diameter glass ampoules in the presence of air, was investigated over the dose range between 0.1 and 10 MGy. It could be demonstrated that under appropriate analytical conditions the weight ratio R between the PFCH formed and the C 7-fraction still remaining is a very precise ( SD about ±2%) measure of absorbed dose D. R/D is around 0.0031 MGy -1 at low doses and about 0.0044 MGy -1 over a plateau ranging from about 5 MGy to the highest dose applied. At low doses, no dose rate dependence could be found between 0.068 and 7.74 kGy/h. The PFMCH system is suggested for use as an integrating dosimeter affixed to items which are exposed to a radiation field varying with time.
ISSN:0146-5724
DOI:10.1016/0146-5724(84)90160-2