Radiophotoluminescence spectra of lithium fluoride TLDs after exposures to different radiation modalities

Excitation spectra for emission at 670 nm remains basically unchanged disregarding detector type, radiation type and dose. In case of emission at 520 nm the situation is different: increase of radiation dose results in broadening of the RPL-E spectrum or even in splitting of the main peak into two separate ones. The effect is observed for both LiF:Mg,Ti and LiF:Mg,Cu,P, while no such effects occur for undoped LiF single crystals.