Fission Physics Laboratory (est. in 1966)
Research interests: formation mechanisms for charge, mass and energy distributions of decay products in nuclear reactions.
Main scientific achievements
- Determined experimental values for fission thresholds and effective moments of nuclear inertia.
- Revealed relation between dispersions of decay products mass distributions and nuclear rigidity in relation to the mass-asymmetric variation of the form. Values of rigidity for the nuclei with Z2/A~22.0-43 were determined.
- Experimental location of the Businaro-Gallone point (the above-stated rigidity is 0).
- Revealed for the first time and studied asymmetry of low-energy nuclear decay in vicinity of lead. Thereby, the hypothesis about existence of independent ways for nuclear fission (heteromodality) has been verified. It was shown that the division heteromodality is an universal feature of nuclear fission in a wide range of nucleon structure.
- Investigated experimentally for the first time the shell effects in mass-energy distributions of debris with masses close to A/2 of low-energy nuclear fission in vicinity of thallium. It was shown that these effects are caused by the influence of two highly deformed neutral shells formed in the decay products with neutron numbers close to 52 and 68.
- Developed systematic approach for calculation of fission yields before and after neutron emission by debris in reactions with neutrons and protons of kinetic energies 5 to 200 MeV at nuclei-targets with Z = 90-97 and A = 230-250. The approach is realised in the software computer code PYF.
Head of the laboratory Kvochkina T.N.
