National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Physical and chemical properties of CeOx/SrTiO3(100) films
Schusser, Jakub ; Veltruská, Kateřina (advisor) ; Ševčíková, Klára (referee)
A study of epitaxial growth of CeOx on SrTiO3(100) surface in CeO2(100)/SrTiO3(100) orientation by reactive vapor deposition in oxygen atmosphere is desirable for widening the current knowledge in the field of ceria-based model catalysts. This work was aimed at determining physical parameters necessary for the growth of CeO2(100) films (substrate temperature, oxygen pressure and deposition rate), atomic structure of the CeO2(100) surface and structure-stoichiometry relation during reversible CeO2↔Ce2O3 transition. Surface science methods were used in order to follow the structural and chemical characteristics of prepared films, such as XPS, XPD, ISS and LEED. The morphology of the prepared films was examined in detail using scanning tunnelling microscope (STM). We also examined the interaction with platinum, which represents the next step towards designing a ceria based catalysts with low noble metal content. Also the redox interaction properties of CeOx and hydrogen were studied.
Processing of two-step γ cascade data from 151Eu(n,γ)152Eu reaction
Schusser, Jakub ; Krtička, Milan (advisor) ; Cejnar, Pavel (referee)
1 Photon strength functions in terms of statistical approach to a nuclear decay describe the probability distribution of photon emission by given nucleus. They can be studied using two step gamma cascades. The two step gamma cascade method was firstly introduced in fifties of the 20th century. Our aim is to study two step gamma cascades following thermal neutron capture in 151 Eu. The experiment was performed at the Nuclear Physics Institute ASCR in Řež near Prague. The acquired emission spectra of photons from thermal neutron capture will be processed by energetic and efficiency calibration and after further processing will be compared to the output of theoretical models.

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