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Radiation Protection Dosimetry 33:193-195 (1990)
© 1990 Oxford University Press
The Variation of TL Properties of Synthetic Quartz by Thermal Annealing
The previously reported supralinear dependence of the 110 oC peak in synthetic quartz on the dose of beta excitation has been further studied. The transition from strong supralinearity to linear or weak supralinear behaviour has been investigated in some detail. In the unannealed material, an initial more than quadratic dose dependence has been observed, behaving like Dk where D is the dose and k a number up to 3. Annealing at high temperature increased substantially the initial sensitivity and reduced the degree of supralinearity. The transition occurs between 500 and 1000 oC, depending partly on the grain size. In this temperature range the initial sensitivity increases by at least an order of magnitude, and the dose dependence reduces gradually, in some cases down to near linearity. In intermediate temperature annealings within the above mentioned range, a transition between low and high values of the supralinearity factor k has been found in the dose dependence curve, which seems to shed some new light on the understanding of supralinearity in this material.