Computerised glow curve deconvolution (CGCD) has been used to study the TL dose response and the relative intensity of the high temperature peaks in both sensitised and 'as received' LiF:Mg,Ti (TLD-700). The 60Co gamma induced dose response of peak 7 is supralinear down to the lowest dose measurable (~ 2.5 mGy) and the supralinearity is strongly dependent on photon energy. In the sensitised material (the sensitisation procedure included 1000 Gy 60Co irradiation followed by a 340°C, 30 min anneal), although the gamma induced dose response of peak 7 is linear, an intense high temperature background limits the minimum measurable dose to 500 μGy and 100 μGy for gamma and neutron irradiation respectively. We conclude that the method of peak 7/peak 5 ratios in both non-sensitised and sensitised TLD-700 is not suitable for neutron-gamma ray dosimetry at personal radiation protection dose levels.
|Number of pages||4|
|Journal||Radiation Protection Dosimetry|
|State||Published - 1 Jan 1990|