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TLD: influence factors
•
TLD response is not significantly affected from environmental conditions
(normal room temperatures, moderate exposure to light).
BUT
Traps are not stable @ room temperatures and annealing @ 400
0
C for 1 h is
required to ensure trap stability.
Fading can affect low T peaks. This can be mitigated by eliminating
corresponding traps (annealing @ 80
0
C for 24 h pre-irradiation) or
emptying them before readout (annealing @ 100
0
C for 2 h pre-irradiation
and 10 min post-irradiation)
•
background correction is necessary for PM dark current and TL non-related
to D (the latter is reduced with N
2
gas purging during readout)
•
TLD response is dose rate independent