[en] Data concerning calibration and type tests of an extremity system based on XD100 rings (Harshaw) are presented. Dosemeter used was a thermoluminescent chip inserted in a sealed pouch and was read out using a Harshaw 6600 reader. Aiming to reduce the lower detectable dose and to improve reproducibility of response, two different methods of analysis were carried out and compared. The first performed a background correction based on an average value obtained from the evaluation of a group of non-irradiated dosemeters and manually subtracted. The second method employed a glow curve deconvolution algorithm. The dosimetric system complied with all ISO/DIS 12794-1 draft report suggested tests, on which this work was based. This work obtained results that point to the applicability of those recommendations to Brazilian institutes and suggest their adoption by the national regulatory commission

[en] The performance of a dosemeter based on thermoluminescent materials, ⁷ LiF and ⁶ LiF, was investigated. The verification if the dosemeter response complies with tests recommended by national and international regulatory organizations was performed. Tests of angular and energy dependence, reproducibility, detectability threshold, batch homogeneity and others were carried out and the obtained response is herein presented. Dosemeter response was evaluated in terms of H_p(10). The tests were carried out taking into account the IRD-RT No 001.01/95 and IEC 1066 reporters that gave the guidelines for this evaluation. The obtained response showed that the studied dosemeter complies with the tests and can be employed for individual monitoring. (author)

[en] Polymer electrolytes based on poly(vinyl alcohol) (PVOH) and lithium dihydrogen-phosphate (LiH₂PO₄) with molar ratio of x = 0.07, 0.10 and 0.14 were prepared in order to investigate the mechanism of ionic motion. Admittance spectroscopy measurements were used to study electrical conductivity relaxation on both anhydrous and hydrated samples in the 5 Hz to 13 MHz frequency range and temperatures ranging from 25 to 150 deg. C. The conductance, G, shows dispersion above a crossover frequency, f_p. This behavior is typical of systems in which correlated ionic motions in the bulk material are responsible for ionic conductivity. For hydrated samples, results reveal that the temperature dependence of the dc-conductivity, σ₀ and the characteristic frequency, f_p, shows Arrhenius-type behavior with the same energy, E_σ. However, for anhydrous conductivity, a Vogel-Tamman-Fulcher (VTF) behavior is shown for both σ₀(T) and f_p(T), with the same pseudo activation energy, B and B_σ, respectively, thus indicating that they are correlated with chain mobility