On fading corrections for LiF:Mg,Ti irradiated by thermal neutrons

The phenomena of preirradiation and postirradiation fading of LiF:Mg,Ti phosphors are considered a significant practical problem in routine dosimetry because of the uncertainties introduced, especially for mixed neutron–gamma dosimetry, as different fading corrections may be necessary for the gamma...

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Bibliographic Details
Published in:Radiation protection dosimetry 2004-01, Vol.110 (1-4), p.305-308
Main Authors: German, U., Weinstein, M., Dubinski, A., Vainblat, N., Alfassi, Z. B.
Format: Article
Language:English
Subjects:
Algorithms
Environmental Exposure - analysis
Equipment Design
Equipment Failure Analysis - methods
Fluorides - radiation effects
Hot Temperature
Linear Energy Transfer
Lithium Compounds - radiation effects
Magnesium - radiation effects
Neutrons
Occupational Exposure - analysis
Radiation Dosage
Radiation Protection - instrumentation
Radiation Protection - methods
Radioisotopes - analysis
Reproducibility of Results
Scattering, Radiation
Sensitivity and Specificity
Thermoluminescent Dosimetry - instrumentation
Thermoluminescent Dosimetry - methods
Titanium - radiation effects
Transducers
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Summary:The phenomena of preirradiation and postirradiation fading of LiF:Mg,Ti phosphors are considered a significant practical problem in routine dosimetry because of the uncertainties introduced, especially for mixed neutron–gamma dosimetry, as different fading corrections may be necessary for the gamma and neutron contributions. We have investigated if the region of interest (ROI) method is applicable to minimizing the fading effect for thermal neutron irradiation as it is for gamma irradiation. By employing the ROI method, which consists of integration between channel 31 below the glow curve maximum and channel 16 above the glow curve maximum, a constant dose value was obtained for the period of 90 d. Thus, by employing the ROI method, a fading independent evaluation of the thermal neutron dose can be made.
ISSN:0144-8420
1742-3406
DOI:10.1093/rpd/nch119