Investigations of OSL properties of LiMgPO4:Tb,B based dosimeters

• A compact OSL dosimetric system was developed.
• Dosimetric cards are based on LiMgPO4 (LMP) material.
• LMP dosimeters show high sensitivity and linear dose response.

Lithium magnesium phosphate LiMgPO4 (LMP) doped with Tb and B is one of new materials intended for use in optically stimulated luminescence (OSL) dosimetry. LMP doped with Tb and B luminophors were synthetized at IFJ PAN in Krakow. The investigations were carried out on self-developed dosimeters consisting of a slide with four LMP detectors and a light tight cover. LMP detectors were investigated in regard to their OSL properties using OSL reader named HELIOS adopted to the readouts of dosimetric cards. New LMP detectors showed high sensitivity to the ionizing radiation, good repeatability of OSL signal and good dose response, 25% of fading in the first two weeks after irradiation. Also, the pronounced dependence of OSL response on the energy of the measured radiation requires to apply the compensation filters.