Manufacturing polycrystalline pellets of natural quartz for applications in thermoluminescence dosimetry

AUTOR(ES)

Carvalho Junior, Álvaro Barbosa de, Barros, Thiago Fernandes, Guzzo, Pedro Luiz, Khoury, Helen Jamil

FONTE

Materials Research

DATA DE PUBLICAÇÃO

10/07/2012

RESUMO

This paper describes the manufacturing process of quartz-pellets and shows their potential use as thermoluminescence dosimeters (TLD) for those applications where low-levels of ionising radiation are present. Two batches of cold-pressed pellets were produced and their resistance were evaluated by vibration tests and weight-loss measurements. The batch manufactured with 75 × 150 µm particles showed enough resistance to be employed as TLD. The dosimetric properties of the 310 °C peak appearing in the glow curves of these pellets were characterized together with commercial TLD-100 units using γ- and X-ray beams with different energies. The uncertainties related to reproducibility and stability of the TL signal were better than 10%. The sensitivity and the linearity of the TL response of quartz-pellets were better than that measured for TLD-100 for doses ranging from 0.5 to 200 mGy. The energy dependence of the quartz-pellets was higher than that of TLD-100 but it cannot be considered a restriction to their use in clinical procedures and industrial applications.

Documentos Relacionados

• Simulation and manufacturing of a miniaturized exponential UWB TEM horn antenna for UWB radar applications
• The optical absorption of gamma irradiated and heat-treated natural quartz
• Verification of Response of Neutron Monitor for In-Flight Neutron Dosimetry
• Study of the thermoluminescence properties and the optical absorption of the eigth varieties of quartz
• Finite element-based model for crack propagation in polycrystalline materials