The GEANT-CALOR interface and benchmark calculations of ZEUS test calorimeters

The simulation of large scale high energy physics experiments is based mainly on the GEANT package. In the current version 3.15 the simulation of hadronic interacting particles is based on GHEISHA or FLUKA. Both programs miss an accurate simulation of the interaction of low energetic neutrons (Ekin<20 MeV) with the materials of the detector. The CALOR89 program package contains a low energetic neutron code. An interface between the CALOR program parts and the GEANT package has been developed. A comparison of simulations with ZEUS test beam measurements shows a good agreement of the energy resolution and the e/h-ratio. ((orig.))