Kinetic modelling of the optically stimulated conversion of peaks 5a and 5 to peak 4 in LiF:Mg,Ti (TLD-100).
The TC/LC conversion model for peaks 4, 5a and 5 in LiF:Mg,Ti (TLD-100) has been studied by solution of the coupled differential equations describing the charge carrier traffic following optical stimulation. Aspects of the model investigated were (i) the two-component exponential decay of the composite peak 5 TL intensity following the bleach, (ii) the role of retrapping during bleaching, (iii) the hole nature of peak 4 and (iv) the conversion of peak 5a traps to peak 4 traps. The high conversion efficiency is naturally explained due to the absence of conduction band competitive mechanisms in the optical ionisation of the electron in the e-h occupied structure corresponding to peak 5a and thereby leading to the hole-only occupied TC/LC leading to peak 4.
Weizman
Y
Y
Physics Department, Ben Gurion University, Beer-Sheva, Israel. yigal@bgumail.bgu.ac.il
Horowitz
Y S
YS
Oster
L
L
D005459:Fluorides / Q000737:chemistry / Q000528:radiation effects*; D007700:Kinetics; D018020:Lithium Compounds / Q000737:chemistry / Q000528:radiation effects*; D008274:Magnesium / Q000737:chemistry; D008962:Models, Theoretical; D055095:Optics and Photonics; D013819:Thermoluminescent Dosimetry / Q000379:methods* / Q000706:statistics & numerical data; D014025:Titanium / Q000737:chemistry
D018020:Lithium Compounds; C027651:lithium fluoride; D014025:Titanium; D008274:Magnesium; D005459:Fluorides