# Microscopic dynamics simulations of multi-nucleon transfer in $^{86}$Kr+$^{64}$Ni at 25 MeV/nucleon

## TL;DR

This study uses a microscopic quantum molecular dynamics model to simulate multi-nucleon transfer in $^{86}$Kr+$^{64}$Ni collisions at 25 MeV/nucleon, revealing detailed reaction mechanisms and fragment distributions.

## Contribution

First application of the ImQMD model combined with statistical decay code to analyze multi-nucleon transfer in this system.

## Key findings

- Reaction mechanism varies from fusion to multi-fragmentation with impact parameter.
- Binary scattering and nucleon transfer dominate semi-peripheral collisions.
- Mass-TKE distribution differs significantly between central and peripheral collisions.

## Abstract

Multi-nucleon transfer in $^{86}$Kr+$^{64}$Ni at an incident energy of 25 MeV/nucleon is for the first time investigated with a microscopic dynamics model: improved quantum molecular dynamics (ImQMD) model. The measured isotope distributions are reasonably well reproduced by using the ImQMD model together with a statistical code (GEMINI) for describing the secondary decay of fragments. The reaction mechanism is explored with the microscopic dynamics simulations from central to peripheral collisions. In central collisions there exists a strong competition among fusion, deep-inelastic scattering and multi-fragmentation at such an incident energy. In semi-peripheral collisions, binary scattering together with nucleon transfer is dominant, and the probability of elastic+inelastic scattering events increases rapidly with impact parameter in peripheral collisions and approaches to one when $b>14$ fm. The mass-TKE distribution in central collisions due to the competition is quite different from those in peripheral collisions and the distribution of total kinetic energy loss (TKEL) for binary events with nucleon transfer is much more broader than those without transfer.