PROPERTIES OF DIFFERENT THIN-LAYER LIF-MG,CU,P TL DETECTORS FOR BETA-DOSIMETRY

Dosimetric properties of two different types of thin TL detectors, des igned to measure personal doses at a depth of 7 mg.cm(-2) in tissue, h ave been compared. At Riso National Laboratory detectors were prepared by fixing LiF:Mg,Cu,P GR-200 thin detectors to 0.7 mm thick Al pieces . At the Institute of Nuclear Physics, a thin layer of LiF:Mg,Cup phos phor of effective thickness 8.5 mg.cm(-2) was sintered to a base of un doped LiF. Beta energy and angular response, detection threshold, stab ility, etc. were investigated for the two detector types. Results show that both detectors possess good energy characteristic and that their sensitivity is sufficient to measure doses below 100 mu Gy reliably. Hence, they are suitable for practical applications in extremity dosim etry.