  The response of a CdWO4 crystal scintillator to protons, alpha particles, Li,
C, O and Ti ions with energies in the range 1 - 10 MeV was measured. The
non-proportionality of CdWO4 for low energy electrons (4 - 110 keV) was studied
with the Compton Coincidence Technique. The energy dependence of the quenching
factors for ions and the relative light yield for low energy electrons was
calculated using a semi-empirical approach. Pulse-shape discrimination ability
between gamma quanta, protons, alpha particles and ions was investigated.
