Abstract
A description of a preparation method for CaSO4:Dy is presented. We undertook to improve the dosimetric properties of CaSO4:Dy powder by varying the dopant concentration, the temperature of dysprosium incorporation, the thermal treatment and the source of reagents. Results characterizing a phosphor prepared with CaSO4 X 2H2O from Baker doped with 0.1 mol% of dysprosium yielded a highly sensitive and very stable TL dosimeter having a fading of about 4%/yr and a TL response which fit to a straight line on the logarithmic scale within the range from 3 mu Gy to 10(2) Gy.
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