Abstract
Characteristics of the thermoluminescence (TL) responses of Yb- and Yb–Tb-doped optical fibers irradiated with 6MV photons are reported. The concentration of Yb in the Yb-doped optical fiber was 0.26mol%; the concentrations of Yb and Tb in the Yb–Tb-doped optical fiber were 0.62 and 0.2mol%, respectively. The TL dose responses are linear in the dose range 0.5–4Gy. The radiation sensitivity of the Yb–Tb material is almost two orders of magnitude higher than the sensitivity of the material doped with Yb alone.
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