Recent measurements of jets in heavy-ion collisions at the LHC indicate the presence of jet quenching, the energy loss of energetic jets in the hot and dense medium. This phenomena has been already observed at RHIC.
The results of measurement of the structure of jets will be discussed. The measurement has been performed using 0.14 nb(-1) of lead-lead collision data provided at a nucleon-nucleon center-of-mass energy of root s(NN) = 2.76 TeV by the Large Hadron Collider and collected by the ATLAS Detector during November and December 2011.