Ternary and quaternary fission studies from 252Cf spontaneous fission using silicon pixel detectors Timepix
Frank Laboratory of Neutron Physics
Nuclear Physics Department
Leader – E. V. Lychagin
Date and Time: Tuesday, 9 November 2021, at 11:00 AM
Venue: online seminar on Webex, Frank Laboratory of Neutron Physics
Seminar topic: “Ternary and quaternary fission studies from 252Cf spontaneous fission using silicon pixel detectors Timepix”
Authors: G. S. Ahmedov, M. Holik, Y. N. Kopatch, D. Berikov and et al.
Speaker: G. S.Ahmedov
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.