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In the previous papers of this series, the result of etching of fresh swift heavy ion (SHI)-irradiated polyethylene terephthalate (PET) foils after thermal annealing in various environments was studied to determine the extent to which thermal annealing is able not only to simulate aging of pristine polymer foils, but also SHI-irradiated foils. The etching results of these foils (obtained using breakthrough times of the etchant across the PET foils that were pre-annealed at different temperatures for constant times) did not always follow the predicted Arrhenius behavior, but showed dip-like deviations that were tentatively attributed to both SHI radiation and ambient effects to the glass transition temperature. To determine whether deviations from the simple Arrhenius behavior also occur for other irradiated polymers, we examined the effect of thermal annealing at different temperatures T of aged SHI-irradiated Kapton foils via the etchant breakthrough times across the SHI tracks. Interestingly, there appeared unexpected wide dip-like deviations from straight Arrhenius plots. Comparison of this curve with corresponding ones of aged non-irradiated Kapton foils, by determining the etchant breakthrough times across the foils, enabled us to assign the obtained high-temperature Arrhenius branch (for T > 80°C) to heal both aged and irradiated polymer foils from aging and/or radiation defects. In contrast, the pristine and irradiated aged samples annealed at lower temperatures follow completely different trends. As in the previous article on PET, we tend to assign the dip-like deviation of the SHI-irradiated Kapton again to the glass transition temperature of this highly radiation-damaged material. [ABSTRACT FROM AUTHOR]

Abstract. The penetration of Ga into various polymers (polyethylene, polyimide, polystyrene, polyethyleneterephtalate and polytetrafluoroethylene) was studied in the temperature interval from 5-80 Celsius. The amount of incorporated Ga was determined by using a Cahn electrobalance and its concentration depth profiles by Rutherford backscattering. It was found that the Ga penetrates into polymers only from liquid phase and the Ga content in the samples increases with temperature and exposition time. Under the same experimental conditions, the Ga content is inversely proportional to the polymer density. [ABSTRACT FROM AUTHOR]

The nuclear reactions induced by thermal and 2 keV neutrons onNa radioactive nucleus were studied. For the thermal neutrons a more accurate value ofNa ( n,p)Ne reaction cross section was obtained. A weak proton transition to theNe ground state was observed. The upper limits of cross sections for thermal neutron induced (n,∞) reaction and ( n, p) reaction with 2 keV neut·rons are given. [ABSTRACT FROM AUTHOR]

For understanding of the diffusion kinetics and their optimization in swift heavy ion track-based biosensors, recently a diffusion simulation was performed. This simulation aimed at yielding the degree of enrichment of the enzymatic reaction products in the highly confined space of the etched ion tracks. A bunch of curves was obtained for the description of such sensors that depend only on the ratio of the diffusion coefficient of the products to that of the analyte within the tracks. As hitherto none of these two diffusion coefficients is accurately known, the present work was undertaken. The results of this paper allow one to quantify the previous simulation and hence yield realistic predictions of glucose-based biosensors. At this occasion, also the influence of the etched track radius on the diffusion coefficients was measured and compared with earlier prediction. [ABSTRACT FROM AUTHOR]