منابع مشابه
Implications of multiply-charged anomalous cosmic rays
During the acceleration of anomalous cosmic rays (ACRs) some singly-charged ions are stripped of additional electrons. The resulting multiply-charged ions are accelerated more efficiently, and most ACRs with ≥30 MeV/nuc are multiply-charged. This paper considers some implications of multiply-charged ACRs, including limits that they place on the time scales for ACR acceleration and transport, an...
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The possibility of discerning extensive air showers initiated by ultra-high energy (UHE) photons from those induced by hadrons is studied. Two effects characteristic only for UHE photons are taken into account: LPM effect and photon conversion/cascading in the geomagnetic field. First conclusions about the possibility of identification of photons in the UHE cosmic-ray spectrum are presented and...
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In the present work, the origin of antiprotons observed in cosmic rays (above the atmosphere) is analyzed in details. We have considered the origin of the primaries, (which their interactions with the interstellar medium is one of the most important sources of antiprotons) is a supernova type II then used a diffusion model for their propagation. We have used the latest parameterization for anti...
متن کامل24 . Cosmic rays 1 24 . COSMIC RAYS
The cosmic radiation incident at the top of the terrestrial atmosphere includes all stable charged particles and nuclei with lifetimes of order 106 years or longer. Technically, “primary” cosmic rays are those particles accelerated at astrophysical sources and “secondaries” are those particles produced in interaction of the primaries with interstellar gas. Thus electrons, protons and helium, as...
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We show that it appears possible for starburst galaxies, like the nearby NGC 253, recently identified as a TeV source by the CANGAROO collaboration, to emit a significant amount of high-energy γ-rays and neutrinos through hadronic processes in their cores. We suggest that proton illumination of the inner winds of massive stars can be a viable mechanism for producing TeV γ-rays and neutrinos wit...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2007
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2006.11.044