C++ implementation of Bethe–Heitler, 5D, polarized, $\gamma{\to}e^+e^-$ pair conversion event generator

International audience; We present the C++ implementation of an event generator for linearly-polarized gamma-ray conversions to γ→e+e− pairs. The generator uses the full 5D Bethe–Heitler probability density function for the generation of the γ→e+e− pair and for the recoil of the target nucleus. The same code is used for triplet generation. We present a verification of the model by comparing sample distributions with theoretical predictions.