Speaker
Description
Nowadays applying of multinucleon transfer reactions (MNT) in heavy
nuclei collisions is supposed as a promising approach to produce new heavy and
superheavy nuclei, especially neutron-rich nuclei. The investigation of their
properties is very important for understanding of nucleosynthesis processes. To
reach the «island of stability» the use of heavy systems such as 238U + 238U and
238U + 248Cm in MNT reactions [1] are often proposed for synthesis of
neutron-rich transuranium nuclei, which can’t be produced in the complete fusion
reactions with stable ions. Recently the properties of fragments formed in the
136Xe + 238U [3] and 209Bi + 197Au, 208Pb, 232Th, 238U [4] reactions at
energies above the Coulomb barrier have been experimentally investigated in the
Flerov Laboratory of Nuclear Reactions at CORSET setup [2]. Implementing of two
independent experimental techniques, namely, two-arm time-of-flight
measurements to investigate two-body coincidences and three-arm time-of-flight
and energy measurements for three-body coincidences made it possible to explore
the properties of binary fragments, as well as three-body events (projectile-like
fragment (PLF) and sequential fission fragments of heavy MNT fragment). The
cross sections for PLFs along with survived target-like fragments (TLFs) and TLFs
undergoing fission have been obtained. The total excitation energies of the formed
dinuclear systems in MNT reactions have been estimated from the measurements
of total kinetic energies. For the reactions with the 238U target the mass loss
during the deexcitation process of excited PLFs has been found using the
measured primary and secondary masses. The transfers of significant number of
nucleons from the projectile to the target nucleus have been found. The obtained
experimental results and the comparison with theoretical calculations performed
within the multidimensional dynamical model of nucleus-nucleus collisions based
on the Langevin equations [5] are presented.
