Optically stimulated luminescence from CaSO4:Eu – Preliminary results

• In this paper for the first time we report intense TL and OSL in CaSO4:Eu phosphor prepared by precipitation method.
• The CaSO4:Eu sample showed good OSL sensitivity which is about 55% of that of commercially available Al2O3:C.
• The OSL decay is similar to Al2O3:C has linear dose response, negligible fading.

A new OSL phosphor CaSO4:Eu was developed. The phosphor shows good OSL sensitivity which is about 55% of commercially available Al2O3:C. The phosphor also shows good TL sensitivity and the dosimetric peak, which appears around 186 °C, has sensitivity nearly 50% of Al2O3:C. After OSL readout of the irradiated sample, the TL peak around 250 °C depletes completely, with partial depletion of peak around 186 °C. Since the traps responsible for the high temperature peak are involved for the observed OSL, the sample shows low post-irradiation fading. The OSL decay is similar to Al2O3:C. Thus this phosphor due to its good OSL sensitivity, linear dose response, low fading and simple preparation technique could be useful for radiation dosimetry applications.