[en] A radiation dosimeter based on Ge-doped silica fibre is described. Parameters concerning thermoluminescence (TL) induced by ⁶⁰Co irradiation are investigated, including activation energies, frequency factors, and reproducibility with dose and fading. It is concluded that Ge-doped silica fibres provide a good basis for medical radiation dosimetry at therapy levels. In particular, doses are reproducible to within 3%, the fibres are reusable and show linearity of dose versus TL output over the approximate range of dose 1 Gy to in excess of 100 Gy. At room temperatures, fading within the first 30 d following irradiation has been found to be of the order of 7%. (author)

[en] A radiation dosimeter based on Ge-doped silica fibre is described. The parameters of thermoluminescence (TL) induced by Co-60 radiation in the silica fibre are investigated. These parameters include activation energies and frequency factors. The reproducibility of the fibre, dose response and fading, have also been investigated. We conclude that this fibre provides good basis for medical radiation dosimetry at therapy levels. In particular, doses are reproducible, the fibres are reusable and show linearity of dose versus TL output over the approximate range of dose 1 Gy to in excess of 100 Gy. At room temperature, fading within the first 30 days following irradiation was found to be of the order of 7 %. (author)

[en] A radiation dosimeter based on Er-doped optical fibre is described. The thermoluminescence characteristics induced by ⁶⁰Co irradiation are investigated. These characteristics including reproducibility, photon dose response, minimum detectable dose, fading and annealing procedure. (Author)