The <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e657" altimg="si76.svg"><mml:mi>γ</mml:mi></mml:math>-ray energy response of the Oslo Scintillator Array OSCAR

The new Oslo Scintillator Array (OSCAR) has been commissioned at the Cyclotron Laboratory (OCL). It consists of 30 large volume (diameter 3.5 x 8 inches) LaBr$_3$(Ce) detectors that are used for $\gamma$-ray spectroscopy. response functions incident $\gamma$-rays up to 20 MeV simulated with $\texttt{Geant4}$. In addition, resolution, and total full-energy peak efficiencies extracted. results in very good agreement measurements from calibration sources experimentally obtained mono-energetic in-beam spectra.