H.M. DIAB

Radiation Dosimetry Laboratory, National Institute of Standards (NIS), Haram, Giza. Egypt, and Physics Department, Faculty of Science, Northen Border University, Arar, KSA.

In this work, one type of thermoluminscence dosimeter radiation-induced graft copolymerization of binary monomer system acrylic acid/acrylamide (AAc/AAm) (50/50) onto low density polyethylene (LDPE) films was irradiated by 60Co therapeutic gamma ray dose. This work deals with the case of sulfonated grafted film which has good properties such as thermal stability, and good dosimetric properties. The various sources of uncertainty for this type of thermoluminscence dosimeter under study were analyzed. The uncertainty budget tables for radiation measurements were declared. For the used procedure, these uncertainties multiply the coverage factor equal 2 to obtain the expanded uncertainty at 95% confidence level. The combined uncertainty doesn’t exceed 6.3%.The expanded uncertainty at 95% confidence level should be added to the value of measurements to obtain the accurate dose.

Author’s e-mail: hdiab2003200327@yahoo.com

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