Topology analysis for the identification of energetic photons in a segmented electromagnetic calorimeter

We present a novel method to identify energetic photons detected in a segmented electromagnetic calorimeter. It is based on topology analysis of electromagnetic showers which develop in the detector following the impact of photons. This approach supplements standard methods for the most energetic photons detected in a given experiment and for which the limited statistics does not permit to define the parameters of the pulse-shape analysis. The method is tested on photons with energies above Eγ>250 MeV produced in the reaction Ar+Ca at 180 A MeV and detected with the TAPS multidetector.