Magnesium tetraborate doped with dysprosium (MgB4O7:Dy) is known as a good thermoluminophor
for personal dosimetry of gamma ray and X-ray radiation because of its high sensitivity and close tissue equivalence.
This material can be produced by different routes. The sintered pastilles of magnesium tetraborate mixed
with Tefl on (40%) used in this work were manufactured at the Federal University of Sergipe, Department of
Physics by the solid-state synthesis. Magnesium tetraborate was already used for high-dose dosimetry, exhibiting
linearity for a wide range of doses. In this work, the authors examined its main characteristics prior to potential
use of detectors in everyday dosimetry, comparing this material to a widely used LiF:Mg,Ti phosphor. The
following tests infl uencing dosimetric peaks of MgB4O7:Dy were presented: (1) the shape of the glow curves,
(2) annealing conditions and post-irradiation annealing and its infl uence for background of the detectors, (3)
the choice of the heating rates at the read-out and (4) the threshold dose, that is, the lowest possible dose to
be measured. Simil ar tests were performed with LiF:Mg,Ti detectors, produced and widely used in Poland. The
results were compared and discussed.
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