Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 1 2 2014 08 24 An investigation of using hump in the Cherenkov photon lateral distribution for Gamma-Hadron separation 127 137 12 10.22128/ijaa.2014.12 EN Gohar Rastegarzadeh Department of Physics, Semnan University , University Sq, Pardis No 1, P.O. Box 35195- 363, Semnan, Iran Sahar Khoshabadi Department of Physics, Semnan University , University Sq, Pardis No 1, P.O. Box 35195- 363, Semnan, Iran Journal Article 2014 08 24 Simulation of gamma and hadron showers in the energy range 100GeV- 25TeV has been carried out. For a big ideal Cherenkov light array, characteristics of lateral distribution of Cherenkov photon density have been studied. Results from this ideal detector are compared with those simulated for a real TUNKA- like array to investigate experimental potential of using existence of a hump in lateral distribution of Cherenkov photon density for gamma-hadron separation. It is shown that by using this technique the proton rejection efficiency of %63 can be achieved in typical TUNKA-like arrays. https://ijaa.du.ac.ir/article_12_390735b7056de8e35a343a29bf39301e.pdf