Investigation of the emission spectra of LiF:Mg,Ti (TLD-100) during thermoluminescence.
The thermoluminescence (TL) of LiF:Mg,Ti has been studied using a high resolution CCD spectrophotometer, which simultaneously measures the emission intensity and the emission spectrum as a function of sample temperature. Computerised deconvolution was used to resolve the emission spectrum into individual Gaussian bands and the TL glow curve into glow peaks. Correction for spectral response and non-linear changes in dispersion were taken into account in the evaluation of the emission spectra. The emission spectra of all TL glow peaks following 200 Gy beta irradiation were found to consist of a common set of five emission bands at 2.49 eV, 2.64 eV, 2.84 eV, 3.1 eV and 3.59 eV, of which the 2.95 eV and 3.59 eV bands have not been previously observed at these dose levels. The band characteristics (E, deltaE) are not sample temperature or dose dependent indicating that the same LCs or the same single centre with several excited states are common to all the glow peaks. The relative intensities of the emission bands do. however, change as a function of readout temperature and dose, a behaviour that could be connected to a temperature and dose dependent perturbation between spatially coupled TCs and LCs.
Biderman
S
S
Physics Department, Ben Gurion University, Beer-Sheva, 84105, Israel. oster@BGUMAIL.BGU.AC.IL
Horowitz
Y
Y
Oster
L
L
D001610:Beta Particles; D005459:Fluorides / Q000737:chemistry / Q000528:radiation effects*; D006358:Hot Temperature; D018020:Lithium Compounds / Q000737:chemistry / Q000528:radiation effects*; D008163:Luminescent Measurements; D008274:Magnesium / Q000737:chemistry; D011854:Radiochemistry; D013053:Spectrophotometry; 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