Energy dependence of the supralinearity (f(D)max) of peaks 7 and 8 in the high temperature thermoluminescence of LiF:Mg,Ti (TLD-100): Interpretation using the unified interaction model

It is demonstrated that the supralinearity of the dose response of glow peaks 7, 8 in the glow curve ofLiF:Mg,Ti (TLD-100) are very strongly dependent on photon/electron energy. Previously published data onf(D)max at photon energies of 1.25 MeV, 100 keV and 8.1 keV effective energy coupled with new dataat w 540 keV using 90Sr/90Y beta rays reveals that the maximum supralinearity f(D)max decreases fromvalues ofw200 andw30 at 1.25MeV, through intermediate values at 540 keV and 100 keV, to values ofw30andw3 at 8.1 keV effective energy. The normalized dose response f(D) for all energies is modeled using theUnified Interaction Model and the dependence of f(D)max on energy is interpreted as arising from strongdependence of the relative intensity of localized recombination on particle energy (ionization density)