Chiral invariant phase space event generator - II. Nuclear pion capture at rest and photonuclear reactions below the $\Delta$(3,3) resonance.

An event generator based on the CHIPS model is implemented in the GEANT4 simulation software package. Nuclear fragment production in the process of pion capture on nuclei is used to tune the parameters of the CHIPS model describing the clusterization of nucleons in nuclei. The spectra of nucleons and nuclear fragments in pion capture and photonuclear reactions at 60 MeV are compared with experimental data.