Observation of the suppression of the flux of cosmic rays above 4×10^19eV
| Publication Type | Journal Article |
| School or College | College of Science |
| Department | Physics |
| Creator | Sokolsky, Pierre |
| Other Author | Abraham, J.; Abreu, P.; Aglietta, M.; Aguirre, C.; Allard, D.; Allekotte, I.; Allen, J.; Allison, P.; Alvarez-Muñiz, J.; Ambrosio, M.; Anchordoqui, L.; Andringa, S.; Anzalone, A.; Aramo, C... et. al. |
| Title | Observation of the suppression of the flux of cosmic rays above 4×10^19eV |
| Date | 2008-08 |
| Description | 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 γ of the particle flux, J∞ E-γ, 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. |
| Type | Text |
| Publisher | American Physical Society |
| Journal Title | Physical Review Letters |
| Volume | 101 |
| Issue | 6 |
| DOI | 10.1103/PhysRevLett.101.061101 |
| citatation_issn | 0031-9007 |
| Subject | Extensive air showers; Energy spectrum; Fluorescence; Suppression |
| Subject LCSH | Cosmic rays; Cosmic ray showers |
| Language | eng |
| Bibliographic Citation | Abraham, J., Abreu, P., Aglietta, M., Aguirre, C., Allard, D., Allekotte, I., Allen, J., Allison, P., Alvarez-Muñiz, J., Ambrosio, M., Anchordoqui, L., Andringa, S., Anzalone, A., Aramo, C., Argiro, S., Arisaka, K., Armengaud, E., Arneodo, F., Arqueros, F., Asch, T., Asorey, H., Assis, P., Atulugama, B. S., Aublin, J., Ave, M., Avila, G., Backer, T., Badagnani, D.,...Sokolsky, P., et. al.(2008). Observation of the suppression of the flux of cosmic rays above 4×10^19eV. Physical Review Letters, 101(6), 061101. |
| Rights Management | (c) American Physical Society http://dx.doi.org/10.1103/PhysRevLett.101.061101 |
| Format Medium | application/pdf |
| Format Extent | 269,381 bytes |
| Identifier | ir-main,10470 |
| ARK | ark:/87278/s6668x87 |
| Setname | ir_uspace |
| ID | 702503 |
| Reference URL | https://collections.lib.utah.edu/ark:/87278/s6668x87 |