Supralinear response and efficiency of LiF : Mg,Ti to 0.7, 1.5 and 3 MeV protons

The thermoluminescent (TL) response, supralinearity function, and relative efficiency with respect to Co-60 gamma -rays, of TLD-100 exposed to 0.7. 1. 5 and 3 MeV protons have been measured. The TL response of the glow curve p eaks using two different deconvolutions, separating in either 7 (3-9) or 9 peaks (3-10 and peaks 6a and 6b). was investigated. Results for the suprali nearity function of peaks 5 and 7-9 and the relative response of peaks 5 an d 7 are insensitive to the chosen deconvolution scheme. At all energies we observe that peak 5 is slightly supralinear and that supralinearity increas es as a function of the peak temperature. The relative efficiencies, measur ed for the total TL signal (area under the glow curve) and peaks 5 and 7, d ecrease with the proton energy having values of 0.33, 0.46 and 0.70 (total TL signal), 0.22, 0.32 and 0.53 (peak 5) and 1.4, 2.6 and 3.6 (peak 7) at 0 .7. 1.5 and 3 MeV, respectively. These data agree with the systematics repo rted in the literature. The measurements of the supralinearity function are compared with Monte Carlo track interaction model calculations. The analys is suggests that the model ion track effective radius and the saturation ra dius are independent of the incident ion energy. (C) 2001 Elsevier Science B.V. All rights reserved.