Narrow Results

The three-dimensional Langevin equation (LE) and Transition State Model (TSM) are applied to calculate prescission neutron multiplicity and anisotropy of fission fragment angular distribution for ¹⁶O+¹⁸¹Ta and ¹⁶O+²⁰⁸Pb systems. Dynamical calculations were carried out considering one-body dissipation. Theoretical results of pre-scission neutron multiplicity and anisotropy have been compared with experimental data for given systems. Calculations show that the results of anisotropy based on dynamical approach are in better agreement with the experimental data as compared with the TSM (in saddle point).

Baryonic Matter at Nuclotron (BM@N) is a fixed-target experiment designed to probe the properties of the strongly interacting matter in the region of high baryon densities. In the beginning of 2023, BM@N has conducted the first physical experiment collecting several hundred millions of $\mathrm{\text{Xe}}+\mathrm{\text{CsI}}$ collisions at the beam energy of 3.8AGeV ($\sqrt{s_{NN}}=3.28$GeV). We report the preliminary results for the directed flow $v_1$ of protons with respect to the spectator symmetry plane from the first physics run at the BM@N facility. The results were compared with the existing data from previous measurements of directed flow in heavy-ion collisions at the beam energies of several GeV.