High-level dosimetry with LiF:Mg,Cu,P TLDs

The unprecedented high-temperature thermoluminescence (TL) emission of LiF detectors was observed after exposures to radiation doses ranging from 1 kGy to 1 MGy. For doses higher than 30 kGy a new TL emission peak 'B' has been observed. For quantification of the glow-curve shape changes of LiF:Mg, Cu, P detectors for doses above 1 kGy and determination of the absorbed dose, the Ultra-High Temperature Ratio coefficient (UHTR) was defined. This newly established dosimetric method was tested in a range of radiation qualities, such as gamma radiation, electron and proton beams, thermal neutron fields and high-energy mixed fields at CERN. The new method for ultra-high dose range monitoring with a single LiF:Mg,Cu,P detector can be used for dosimetry at high energy accelerators, thermonuclear fusion facilities and has great potential for accident dosimetry. (author)