Determination of self attenuation coefficient and relative TL efficiency of CaSO4:Dy, LiF:Mg,Cu,P and LiF:Mg,Ti TLDs – An alternate approach

Self attenuation of TL and relative TL efficiency of polytetra fluoro ethylene (PTFE) embedded CaSO4:Dy disc, LiF:Mg,Ti (MTS) disc and LiF:Mg,Cu,P (MCP-N) chip were determined in the present study for photons of energy 10–34 keV. The relative TL efficiency was determined using an alternative approach in which ratio of experimental response and corrected theoretical response was used instead of measuring the absolute TL emission in photon counting mode. For CaSO4:Dy disc, it was found that with increasing the proportion of CaSO4:Dy phosphor in the disc, the light attenuation coefficient increases. The light attenuation coefficient of MTS disc and MCP-N chip was found to be 23.4 and 45.5 cm−1, respectively. The relative TL efficiency in the photon energy range of 10–34 keV for MTS discs and MCP-N chips, evaluated in the present study matches well with the reported values in the literature.

► Relative TL efficiency in the energy range 10–34 keV has been determined using an alternate approach for CaSO4:Dy disc, MTS disc and MCP-N chip.
► For CaSO4:Dy disc, it was found that light attenuation coefficient increases with the proportion of CaSO4:Dy phosphor in the disc.
► The light attenuation coefficient of MTS disc and MCP-N chip was found to be 23.4 and 45.5 cm−1, respectively.
► Relative TL efficiency in the photon energy range of 10–34 keV for MTS discs and MCP-N chips matches well with the reported values in the literature.