Performance of the first prototype of the CALICE scintillator strip electromagnetic calorimeter

A first prototype of a scintillator strip-based electromagnetic calorimeter was built, consisting of 26 layers of tungsten absorber plates interleaved with planes of 45x10x3 mm3 plastic scintillator strips. Data were collected using a positron test beam at DESY with momenta between 1 and 6 GeV/c. The prototype's performance is presented in terms of the linearity and resolution of the energy measurement. These results represent an important milestone in the development of highly granular calorimeters using scintillator strip technology. This technology is being developed for a future linear collider experiment, aiming at the precise measurement of jet energies using particle flow techniques

Vliv zeoliticke matrice na redox a katalyticke vlastnosti Cu iontu

The aim of the dissertation is to bring insight into the relationship between the structure, redox properties and catalytic activity in propane oxidation of the Cu ions in high-silica zeolitesSummary in EnglishAvailable from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi

Combined Experimental and Theoretical Investigations of Heterogeneous Dual Cation Sites in Cu,M-FER Zeolites

Carbon monoxide is frequently used as a probe molecule for characterization of adsorption sites in zeolites by means of infrared (IR) spectroscopy. IR spectra of carbonyl species in zeolites are usually understood within a concept of CO adsorption on a single cation site. This concept, however, is not sufficient in microporous materials when the concentration of cationic sites increases. Adsorption complexes formed on homogeneous dual cation sites were recently described (J. Phys. Chem. B 2006, 110, 22542) based on a combination of experimental and theoretical investigations. The concept of dual cation sites is extended for the situation where CO is strongly bound on the Cu+ cation and it also interacts with the extra-framework alkali-metal cation. The existence and properties of theCOadsorption complexes on such heterogeneous dual cation sites are discussed for Cu,M-FER zeolites (M =H, Na, K, Cs) having various compositions. Based on a good agreement between theoretical (periodic density functional theory) and experimental (IR, microcalorimetry, TPD) results, the interpretation of some IR features is offered.Bulanek, R.; Frolich, K.; Cicmanec, P.; Nachtigallova, D.; Pulido Junquera, MA.; Nachtigall, P. (2011). Combined Experimental and Theoretical Investigations of Heterogeneous Dual Cation Sites in Cu,M-FER Zeolites. Journal of Physical Chemistry C. 115(27):13312-13321. doi:10.1021/jp200293yS13312133211152