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Simulation Study on Identifiability of UHE Gamma-ray Air Showers

Authors :
Wada, Y.
Inoue, N.
Miyazawa, K.
Vankov, H.P.
Source :
Nuclear Physics B Proceedings Supplement. Jan2008, Vol. 175-176 Issue 1, p253-256. 4p.
Publication Year :
2008

Abstract

The chemical composition of Ultra-High-Energy (UHE) comic rays is one of unsolved mysteries, and its study will give us fruitful information on the origin and acceleration mechanism of UHE cosmic rays. Especially, a detection of UHE gamma-rays by hybrid experiments, such as AUGER and TA, will be a key to solve these questions. The characteristics of UHE gamma-ray showers have been studied by comparing the lateral and longitudinal structures of shower particles calculated with AIRES and our own simulation code, so far. There are apparent differences in a slope of lateral distribution (η) and a depth of shower maximum (Xmax) between gamma-ray and proton induced showers because UHE gamma-ray showers are affected by the LPM effect and the geomagnetic cascading process in an energy region of . Different features between gamma-ray and proton showers are pointed out from the simulation study and an identifiability of gamma-ray showers from proton ones is also discussed by the method of Neural-Network-Analysis. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
09205632
Volume :
175-176
Issue :
1
Database :
Academic Search Index
Journal :
Nuclear Physics B Proceedings Supplement
Publication Type :
Periodical
Accession number :
28153970
Full Text :
https://doi.org/10.1016/j.nuclphysbps.2007.11.008