IFLP 13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Observation of the suppression of the flux of cosmic rays above 4x10^19eV.
Autor/es:
PIERRE AUGER COLLABORATION, HERNAN WAHLBERG
Revista:
PHYSICAL REVIEW LETTERS
Referencias:
Año: 2008 vol. 101 p. 61101 - 61101
ISSN:
0031-9007
Resumen:
The energy spectrum of cosmic rays above 2.5x10^18eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. The spectral index gamma of the flux, J ~ E^-gamma, at energies between 4x10^18eV and 4x10^19eV is 2.69+-0.02(stat)+-0.06(syst), steepening to 4.2+-0.4(stat)+-0.06(syst) at higher energies, consistent with the prediction by Greisen and by Zatsepin and Kuz´min.
