Orateur
Dr
Ioana Maris
(Universitaet und Forschungszentrum Karlsruhe)
Description
The measurement of the energy spectrum above $2.5\cdot 10^{18}$ eV at the Pierre Auger Observatory is presented. Above 20000 events of zenith angle less than $60^\circ$ have been recorded by the surface detector and the acceptance of 7000 km$^2$sr yr, achieved during the construction phase is larger than of previous experiments. The spectral features of the particle flux will be disscused. At high energies the flux is suppressed, the hypothesis of a single power-law behaviour as obtained in the lower energy range beeing rejected with a significance of more than 6 sigma.
Auteur principal
Dr
Ioana Maris
(Universitaet und Forschungszentrum Karlsruhe)
