Journal article
Observation of the suppression of the flux of cosmic rays above 4 x 10 (19) eV.
- Abstract:
- The energy spectrum of cosmic rays above 2.5 x 10;{18} eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. The spectral index gamma of the particle flux, J proportional, variantE;{-gamma}, at energies between 4 x 10;{18} eV and 4 x 10;{19} eV is 2.69+/-0.02(stat)+/-0.06(syst), steepening to 4.2+/-0.4(stat)+/-0.06(syst) at higher energies. The hypothesis of a single power law is rejected with a significance greater than 6 standard deviations. The data are consistent with the prediction by Greisen and by Zatsepin and Kuz'min.
- Publication status:
- Published
Actions
Access Document
- Publisher copy:
- 10.1103/physrevlett.101.061101
Authors
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 101
- Issue:
- 6
- Pages:
- 061101
- Publication date:
- 2008-08-01
- DOI:
- EISSN:
-
1079-7114
- ISSN:
-
0031-9007
- Language:
-
English
- Keywords:
- Pubs id:
-
pubs:5997
- UUID:
-
uuid:1f7fbc63-c89d-49f6-a7ce-bfc8b789a0c3
- Local pid:
-
pubs:5997
- Source identifiers:
-
5997
- Deposit date:
-
2012-12-19
- ARK identifier:
Terms of use
- Copyright date:
- 2008
- Notes:
- 7 pages, 2 figues, accepted for publication in Physics Review Letters
If you are the owner of this record, you can report an update to it here: Report update to this record