Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....4.1410c&link_type=abstract
Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int
Physics
Scientific paper
The remarkable event JF2af2 observed near 107 GeV in the emulsion chamber embarked on the Concorde shows a perfect alignment of the most energetic gamma's on the X-ray film. To investigate the origin of this phenomenon which indicates a coplanar emission, we have simulated some samples of stratospheric gamma ray families with CORSIKA code and different interaction models. Events with such common features are selected by a simple least square method. The dependance of this phenomenon on favourable geometrical circumstances (a very large transverse momentum for one very energetic secondary near the vertical plane and a large zenith angle) is investigated. The Concorde event (52° of inclination) may enter in this category (with a typical gap between the main clusters). Simulations are also carried out at Pamir altitude where such mechanism would give a probability rising with zenithal angle.
Attallah R.
Capdevielle Jean-Noel
Talai M. C.
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