Synthesis and thermoluminescence of LaAlO3:Pr3+ to UVC radiation dosimetry

• High sensitivity of new phosphor to UVC dosimetry was is studied.
• Thermoluminescence response of LaAlO3:Pr3+ is presented.
• LaAlO3:Pr3+ is suggested as UVCR dosimeter.
• TL response of LaAlO3:Pr3+ has dependence on sintering temperature.

Thermoluminescent (TL) response of trivalent praseodymium ion doped lanthanum aluminate (LaAlO3:Pr3+) obtained by Pechini method and Spray Dryer was studied. TL response of LaAlO3:Pr3+ powders submitted at 1600 °C exhibited one peak centered at 157 °C. Sensitivity of LaAlO3:Pr3+ was improved in around 90 times compared with undoped LaAlO3. TL response as a function of wavelength showed a maximum in 230 nm. Dosimetric characteristics of LaAlO3:Pr3+ under UVR radiation effects were analyzed. Evaluation of activation energy was obtained by Glow Fit v.1.3 software. Experimental results about thermoluminescent characteristics of LaAlO3:Pr3+ suggest as good candidate to be employed as a complementary thermoluminescent device with other TL phosphors as aluminum oxide