Further studies on the dosimetric characteristics of LiF:Mg,Cu,Si—A high sensitivity thermoluminescence dosimeter (TLD)

Recent development of LiF:Mg,Cu,Si exhibiting high TL sensitivity (55 times that of TLD-100 LiF:Mg,Ti) and insignificant higher temperature peak leading to negligible residual TL signal has provided a TLD for pragmatic replacement of both LiF:Mg,Ti and LiF:Mg,Cu,P in personal dosimetry. LiF:Mg,Cu,Si withstood readout temperature up to 300∘C. For the reader annealing using a maximum readout temperature and clamping at 260∘C, no significant change in the TL sensitivity and glow curve structure was observed for more than 100 reuse cycles of exposures (5.5mGy) and readout. TL emission spectrum LiF:Mg,Cu,Si was found to have three emission bands peaking at 355, 385 and 440nm similar to that of LiF:Mg,Cu,P but differing in the relative intensities. Negligible fading, insensitivity to room light and absence of the effect of pre- or post-storage annealing on the response and the glow curve structure makes it a strong contender to be opted for personal dosimetry applications.