Design of a personnel dosimetry badge system for a new TL material CaSO-4:Dy,P

A badge system for a new type of CaSO4:Dy based TL dosimeter, KCT-300 developed in KAERI, has been designed by analyzing response data obtained from both experiments and Monte Carlo simulations. The badge, named KCT-300PB, consists of three characterized areas: the open window area, the energy compensation area, and the energy information area. Different filter combinations in each area allowed to compensate energy dependency of the responses and to provide both the deep dose equivalent Hp(10) and the shallow dose equivalent Hp(0.07) with acceptable accuracy. The relative response under energy compensation area is in the range of 0.75 1.0 over the photon energy range from 20 keV to 662 keV. This means badge system KCT-300PB satisfies ANSI and ISO standards prescribed for type-testing of personnel dosimeters. By introducing hole tapered at 60 o angle to the filter, angular dependence of the response to low energy photon was considerably improved. The KCT-300PB is capable to discern beta-gamma mixed fields by utilizing the responses of the open window area and the energy compensation area and capable to resolve X-rays or X- rays and gamma mixed fields by analyzing the ratio of difference in responses. It is a potential advantage of this badge system to make the dose evaluation algorithm simple