IAEA high-dose intercomparison in Co-60 field

Nine high-dose calibration laboratories collaborated with the IAEA in a 'do uble-blind' intercomparison of absorbed dose in the 10-50 kGy dose range. B ureau International des Poids et Mesure undertook the analysis of the resul ts as well as assisted in the development of the protocol. IAEA alanine-ESR transfer dosimeters were used for this intercomparison. The agreement was within 2.0% at 15 kGy and 2.2% at 45 kGy which is very good considering the variety of irradiation conditions employed by the participants. The mean o f the dose values measured by the IAEA Dosimetry Laboratory was within 1% o f the mean of the dose values stated by the participants for both dose valu es. (C) 2000 Elsevier Science Ltd, All rights reserved.