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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Energy spectrum and chemical composition of cosmic rays
 Šalko, Jakub ; Nosek, Dalibor (advisor) ; Vícha, Jakub (referee)
A combined analysis of the energy spectrum and the chemical composition of ultra-high energy cosmic rays in the energy range from 1017.55 to 1019.25 eV ob- served by Pierre Auger Observatory is presented. Six different sets of primaries are considered with allowed particle fractions being determined by provided cal- culations. These calculations are based on simple assumptions about the energy spectra of primary particles and the evolution of the depth of shower maximum with energy. A simple power-law behaviour of particle spectra proved to be in- sufficient for describing the ankle in the observed all-particle energy spectrum. Assuming a broken power-law behaviour is able to reconstruct the observed all- particle energy spectrum with its ankle and the mean of the depth of shower maximum data with its break in each considered set. Including the spread of the depth of the shower maximum into calculations as quality checks suggest that provided calculations do not satisfy all relevant observables linked with chemical composition. 1
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