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Photonuclear interactions of ultrahigh energy cosmic rays and their astrophysical consequences
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Stecker, F. W. Bredekamp, J. H. Puget, J. L. |
| Copyright Year | 1975 |
| Description | Results of detailed Monte Carlo calculations of the interaction histories of ultrahigh energy cosmic-ray nuclei with intergalactic radiation fields are presented. Estimates of these fields and empirical determinations of photonuclear cross sections are used, including multinuclear disintegrations for nuclei up to 56Fe. Intergalactic and galactic energy loss rates and nucleon loss rates for nuclei up to 56Fe are also given. Astrophysical implications are discussed in terms of expected features in the cosmic-ray spectrum between quintillion and sextillion eV for the universal and supercluster origin hypotheses. The results of these calculations indicate that ultrahigh energy cosmic rays cannot be universal in origin regardless of whether they are protons or nuclei. Both the supercluster and galactic origin hypotheses, however, are possible regardless of nuclear composition. |
| File Size | 9859279 |
| Page Count | 55 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750018892 |
| Archival Resource Key | ark:/13960/t6935mc4g |
| Language | English |
| Publisher Date | 1975-07-01 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Radiation Spectra Astrophysics Nuclei Nuclear Physics Energy Dissipation Photonuclear Reactions High Energy Interactions Evolution Development Monte Carlo Method Cosmic Rays Galactic Radiation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
