Basically I am not from Physics and computer science background. Could any one suggest or give me some link to learn about Geant4? I am not getting anything in Geant4
Geant4 is a C++ library. You can only use it you have a thorough understanding of programming. But you may have a look at GATE (http://www.opengatecollaboration.org/). GATE is based on Geant4 ans has relatively simple macros to run simulations.