Abstract:

Disportion contributed zinc borate (ZnB2O4:Dy) phosphors are synthesized by nitric acid method. The prepared powder samples are characterized by X-ray breakdown technique (XRD). The dependency of dust samples to the beta-radiation dose has been studied using the thermoluminescence (TL) technique. The dosage-response curves of dust samples were studied in the 143 mGy-60 Gy beta dose range. Reactions to the beta-radiation dose of dust samples and the minimum detectable dose (MDD) values have been determined. The TL-dose response of ZnB2O4:Dy powder samples against beta radiation has shown a fairly linear response. The MDD values of 1, 2, 3, 4, 5% and 10% Dy-contributed ZnB2O4 powder samples are determined as 77, 75, 41, 93, 74 and 162 mGy, respectively. ZnB2O4:0,05Dy phosphorus TL radiation curves have been obtained at different heating rates and with the increase in heating speed, TL pic temperature has been observed to shift to high temperatures. The powder samples have been shown to have the likeness severity of the possibility of being used for beta radiation doses in the mGy scale. The results of the experiment show that ZnB2O4:Dy powder samples have a potential use in the radiation dosimetry as thermoluminessance dosimetry materials for beta radiation.

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