Abstract
Abstract Thermoluminescence properties of lanthanum aluminum oxide (LaAlO3) crystals doped with optically active rare earth ions have been investigated for ultraviolet dosimetry purposes. Single crystals co-doped with 5.0 at.% of Ce3+ and 1.0 at.% of Dy3+ ions have two thermoluminescent (TL) peaks at 151 °C and 213 °C which can be sensitized after 1 h of UV exposure. The material shows very high TL output and linear response for UV spectral irradiance ranging from 0.04 to 1.20 mJ cm−2, that corresponds to 10 times the TL response of the Al2O3:C oxides. From 0.62 to 148.0 mJ cm−2 the dependence is linear with the logarithm of the spectral irradiance. The investigation demonstrates that LaAlO3:Ce,Dy crystals are very attractive to be investigated as UV dosimeters.
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