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Studium produkce jetů v jádro-jaderných srážkách na urychlovači RHIC
Barnovská, Zuzana ; Bielčíková, Jana (advisor) ; Tomášik, Boris (referee)
Title: Study of jet production in nucleus-nucleus collisions at RHIC Author: Mgr. Zuzana Barnovská Department: Institute of Particle and Nuclear Physics Supervisor: RNDr. Jana Bielčíková, Ph.D., Nuclear Physics Institute of the ASCR Abstract: The goal of this thesis is to study strange particles (Λ, ¯Λ a K0 S) in jets at the energy of √ sNN = 200 GeV in d+Au and Au+Au collisions measured by the STAR experiment at RHIC in 2007 and 2008. After the application of geometrical and topological limits, jets were reconstructed with the kT and anti- kT jet algorithms and special selection criteria for strange particles were applied. Ratios of the production of strange baryons and mesons in jets were calculated and compared to previous results of inclusive V0 particle production measured by the STAR experiment. Study of centrality dependence of these ratios was performed and compared to values in d+Au collisions. Keywords: jets, d+Au collisions, Au+Au collisions, STAR, RHIC 1
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Studium produkce jetů v jádro-jaderných srážkách na urychlovači RHIC
Barnovská, Zuzana ; Bielčíková, Jana (advisor) ; Tomášik, Boris (referee)
Title: Study of jet production in nucleus-nucleus collisions at RHIC Author: Mgr. Zuzana Barnovská Department: Institute of Particle and Nuclear Physics Supervisor: RNDr. Jana Bielčíková, Ph.D., Nuclear Physics Institute of the ASCR Abstract: The goal of this thesis is to study strange particles (Λ, ¯Λ a K0 S) in jets at the energy of √ sNN = 200 GeV in d+Au and Au+Au collisions measured by the STAR experiment at RHIC in 2007 and 2008. After the application of geometrical and topological limits, jets were reconstructed with the kT and anti- kT jet algorithms and special selection criteria for strange particles were applied. Ratios of the production of strange baryons and mesons in jets were calculated and compared to previous results of inclusive V0 particle production measured by the STAR experiment. Study of centrality dependence of these ratios was performed and compared to values in d+Au collisions. Keywords: jets, d+Au collisions, Au+Au collisions, STAR, RHIC 1
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Studium mikrostruktury ultrajemnozrnných kovových materiálů metodou pozitronové anihilace
Barnovská, Zuzana ; Čížek, Jakub (advisor) ; Procházka, Ivan (referee)
In the presented thesis we study the changes in distribution of the size of vacancy clusters in metals processed by severe plastic deformation, so called ul- tra fine grained materials. We use a modern non-destructive method of positron annihilation spectroscopy, which is one of the few methods that allow us to inves- tigate point defects like vacancies with sizes of a few ˚A. The obtained spectra of positrons annihilating in the samples enable us to determine changes of vacancy cluster sizes depending on temperature or severity of the deformation applied on the samples. 1
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