The emission probabilities and the energy distributions of particles emitted in the spontaneous ternary and quaternary fission of ²⁵²Cf were determined. To study these processes, an experimental setup (figure) was assembled, consisting of three silicon ∆E-E telescopes and a silicon detector. Thin detectors with an area of 10 × 10 mm² and a thickness of 15 and 150 μm were used to measure ∆E, and Timepix silicon pixel detectors with an area of 14 × 14 mm² and a thickness of 300 and 600 μm were used to measure E. We registered ternary and quaternary particles beginning from proton up to C from ²⁵²Cf spontaneous fission source with an activity of 350 kBq. The particle identification was performed with ∆E-E particle identification technique (figure). Preliminary results from collected data within 45 days of measurements were presented. From the measured partial-energy spectra of the particles, it was possible to estimate the total yields of the various particle types by extrapolation.