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86
ST 1.2 –
Dosimetría externa
EVALUATION OF TL RESPONSE AFTER OSL MEASUREMENTS OF
BeO SAMPLES
Groppo, Daniela*; Caldas, Linda
Instituto de Pesquisas Energéticas e Nucleares. Brasil.
* Responsible author, email: daniela.piai.groppo@gmail.com
The ionizing radiations are applied with great success in different areas such as medicine
(diagnostic radiology and therapeutic applications) and industry. The thermoluminescence (TL)
and optically stimulated luminescence (OSL) are widely used as dosimetric techniques for many
applications. Knowing exactly the main parameters that can influence the luminescent response
of dosimeters, the best conditions for the measurements can be defined. In this work, initially
BeO samples were irradiated using a beta source (
90
Sr+
90
Y) available in the Risø TL/OSL-DA-
20 reader, which was also used to carry out the TL and OSL readings. The OSL measurements
were taken between 20°C and 400°C. After each measurement, a thermoluminescent reading
was realized. In the case of OSL, the response decreases as the temperature increases. The
TL response obtained decreases as the OSL reading temperature increases. This study allowed
the observation of the temperature effect on the charge release during OSL measurements, and
to define until which temperature the TL response can be verified following OSL measurements
of BeO samples.