Energy dependence of new thermoluminescent detectors in terms of HP(10) values

The aim of this work was to determine energy dependence characteristics in terms of values of the personal dose equivalent, HP(10). The following types of thermoluminescent detectors (TLDs) were investigated: (a) two new types based on lithium borate, Li2B4O7:Cu,In and Li2B4O7:Cu,In,Ag; (b) two types based on the highly sensitive material LiF:Mg,Cu,P, TLD-700H and GR 200A; (c) two well-known types of LiF:Mg,Ti detector, TLD-100 and TLD-700 and (d) highly sensitive Al2O3:C detectors. TLDs previously calibrated with 137Cs gamma rays were simultaneously irradiated with X ray beams in the range of mean energies between 33 and 116 keV. The irradiations were performed with detectors in polymethyl methacrylate (PMMA) holders placed on a 30 cm x 30 cm x 15 cm water phantom with PMMA walls (ISO phantom). Measured energy responses were compared with calculated data for HP(10) values. The results confirmed the satisfactory tissue equivalent characteristics of all investigated TLDs except Al2O3:C, which (due to its large energy dependence) is suitable for personal dosimetry only with an appropriate filter.     

Overview of the current activities related to deep geothermal energy utilisation in the Republic of Croatia

Clean Technologies and Environmental Policy - The Pannonian Basin, partly located in Croatia, is well known for its higher-than-average geothermal gradient with good potential for geothermal energy...     

Photoelectrochemical properties of thin low cost polycrystalline CdS photoanodes

In the present paper photoelectrochemical processes and physical properties of the photovoltaic CdS|KClK₃ Fe(CN)₆K₄ Fe(CN)₆|Pt electrolytic cell have been studied. CdS polycrystalline photoanodes were prepared by pyrolytic spraying. The electrode resistance was measured and the film structure and composition were analyzed by SEM. Optical measurements were performed in order to determine the absorbance and the energy gap of the sprayed CdS films. Current-voltage characteristics as a function of the redox couple concentration and light intensity were measured under incandescent illumination and sunlight. Fill factors varied in the range from 0.2 to 0.4 and the efficiency of the yet non-optimized cells reached 0.4%. The problem of stability of the photoanode and its passivation were also discussed.     

Untersuchungen über den Fasersättigungspunkt des Buchen=, Eichen=, Tannen= und Fichtenholzes

Zusammenfassung Der Fasers?ttigungspunkt von Buchen-, Eichen-, Tannen- und Fichtenholz wurde durch Messung der Druckfestigkeit und der r?umlichen Schwindung bestimmt. Ferner wurden die Abh?ngigkeit der Druck-festigkeit von der Holzfeuchtigkeit, der Einflu? der Abmessungen der Proben auf den Fasers?ttigungspunkt, die Abh?ngigkeit des Fasers?ttigungspunktes (beim Eichenholz) von der Lage der Proben im Stamm sowie der Unterschied des Fasers?ttigungspunktes im Kern-und Splintholz untersucht.