Specific features of the influence of high-energy electron beams on the luminescent properties of undoped and Nb, Fe-doped Al₂O₃ crystals.
The influence of 10 MeV high-current electron beams accelerated by the M-30 microtron on the luminescent properties of the α-Al₂O₃, Al₂O₃:Nb and Al₂O₃:Fe crystals has been studied. The effect of the long-term phosphorescence at room temperature has been found that can be used to monitor electron and gamma accelerator beams.
Luminescent properties of LiF:Mg,Cu,P detectors irradiated by the 10-MeV electrons
ABSTRACT In this study, the effect of intensity and irradiation dose of mixed 10-MeV gamma-electron beam and braking (Bremsstrahlug) radiation of gamma-quanta beam with the electron fluence range of on the luminescent properties of the TLD-100H detectors has been studied. The long-term phosphorescence of the samples has been established; was found it dependent on irradiation intensity and dose at room temperature. The mechanism of influence of radiation defects on the luminescent properties of irradiated a materials is discussed too.
Computerized glow curve deconvolution applied to ultralow dose LiF thermoluminescence dosimetry
Abstract A computerized glow curve deconvolution technique (CGCD) and its application to the ultralow dose thermoluminescence (TL) glow curve of LiF:Mg, Ti (TLD-100) are described. The benefits in precision and minimum measurable dose (MMD) applied to TLD-100 are considerable. The CGCD analysis interpolatively estimates the background signal under peaks 4 and 5 which greatly reduces the errors introduced by inaccurate background subtraction due to second readout as well as eliminating the need for second readout. In addition, the error introduced via inaccurate separation of peak 3 is reduced and post-irradiation annealing is rendered unnecessary. An additional important feature of the CGCD method is the ability to reject/correct outliers in the glow curve. Assuming an MMD criterion of ±20% (1 SD) precision yields an MMD of 1.9 μGy (0.19 mrad) and 27 μGy (2.7 mrad) for CGCD and routine analysis respectively, i.e., an improvement in MMD of a factor 14.2.