Production mechanism of new neutron-rich heavy nuclei in the Xe136+198Pt reaction

The multinucleon transfer reaction of ${}_{136}\text{Xe}+{}^{198}\text{Pt}$ at $E_{\mathrm{lab}}=7.98\text{MeV/nucleon}$ is investigated by using the improved quantum molecular dynamics model. The quasielastic, deep-inelastic, and quasifission collision mechanisms are studied via analyzing the angular distributions of fragments and the energy dissipation processes during the collisions. The measured isotope production cross sections of projectile-like fragments are reasonably well reproduced by the calculation of the ImQMD model together with the GEMINI code. The isotope production cross sections for the target-like fragments and double differential cross sections of ¹⁹⁹Pt, ²⁰³Pt, and ²⁰⁸Pt are calculated. It is shown that about 50 new neutron-rich heavy nuclei can be produced via deep-inelastic collision mechanism, where the production cross sections are from ${10}^{-3}$ to ${10}^{-6}\text{mb}$. The corresponding emission angle and the kinetic energy for these new neutron-rich nuclei locate at ${40}^{\circ }\text{–}{60}^{\circ }$ and 100–200 MeV, respectively.