Ionisation density effects following optical excitation in LiF:Mg, Ti (TLD-100).
The TL signal following 5 eV photon excitation of previously irradiated and readout material has been studied as a function of ionisation density and various experimental parameters: (i) maximum temperature of the first readout; (ii) photon fluence; (iii) photon energy and (iv) beta ray dose. Following alpha particle irradiation, the ratio of the second-readout to first-readout TL signal, epsilon(alpha,) has been found to be 10-20 times higher than that following beta irradiation, indicative of the possibility of using the double ratio epsilon(alpha)/epsilon(beta) as a mixed-field discriminator. The beginning of an attempt to explain this unusual effect is offered in the framework of the track structure theory and kinetic modelling of the beta ray dose-response of the first and second readouts.
Weiss
D
D
Nuclear Research Center-Negev, Beersheva, Israel.
Horowitz
Y
Y
Oster
L
L
D016477:Artifacts; D004307:Dose-Response Relationship, Radiation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005459:Fluorides / Q000737:chemistry* / Q000528:radiation effects*; D007477:Ions; D008027:Light; D018020:Lithium Compounds / Q000737:chemistry* / Q000528:radiation effects*; D009502:Neutrons; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D007477:Ions; D018020:Lithium Compounds; C027651:lithium fluoride; D005459:Fluorides