Investigation of the optical absorption characteristics of slow-cooled LiF:Mg,Ti (TLD-100)

Probing the defect nanostructure of helium and proton tracks in LiF:Mg,Ti using optical absorption: Implications to track structure theory calculations of heavy charged particle relative efficiency

“…The Ben Gurion University (BGU) group has measured the OA of LiF:Mg,Ti samples over an extended dose-range from 10 Gy to 10 5 Gy. The dose response of the absorbance, a, of all the major bands are linear/exponentially saturating [43,55] with…”

Conduction band/valence band kinetic modeling of the LiF:Mg,Ti system incorporating creation of defects in the irradiation stage

“…The dose response characteristics of these OA bands following electron/photon irradiation have been experimentally measured as linear/exponentially saturating with dose filling constants, b, equal to Table 1 for a description of the various symbols. 0.8 Â 10 À3 Gy À1 (4 eV band), 4 Â 10 À4 Gy À1 (5 eV F band) and 1 Â 10 À4 Gy À1 (5.45 eV band) [32][33][34].The uncertainty on these experimental values of b is $20%. The dose response of the intensity of OA bands describes the relative population density of the various centers as a function of dose.…”

“…It deserves mention that experimental measurements indicate that these dose filling rates are not dependent on photon energy which has a special simplifying significance in the application of TST to the calculation of HCP induced OA in LiF:Mg,Ti [6]. It also deserves mention that the experimental measurements of OA dose response [32][33][34] covered only over a fairly limited dose range from 50 to 5000 Gy due to the inherent limitations in the measurement of optical transmission so that more complicated behavior at both lower and higher levels of dose is certainly possible. The saturation level of radiation created vacancies is given by N 3 in eq'n 6 and it is assumed that the concentration of radiation created vacancies exponentially increases to this saturation level with a dose filling constant b V .…”