DOSE INTERCOMPARISON EXPERIMENT FOR GAMMA-RAYS AND 3-MEV ELECTRONS BYMAILING DOSIMETRY USING FREE-RADICAL DOSIMETERS

The high-dose intercomparison experiments between BARC and JAERI for C o-60-gamma-rays and 3-MeV electrons were carried out by mailing alanin e (powder and alanine-polymer) and glutamine (powder) dosimeters betwe en the two facilities. Powder dosimeters and alanine-polymer dosimeter s were read out by spectrophotometry and EPR spectrometry, respectivel y. Absorbed dose values at about 1, 10, 33 and 54 kGy estimated by the se dosimeters were in good agreement with JAERI nominal doses within /- 5% both for gamma-rays and electrons. This preliminary result shows that these free-radical dosimeters have useful characteristics as mai ling dosimeters for regional transfer dose standardization.