Vol 89, No 8 (2025)

Energy spectra of alpha particles and ^6.7Li nuclei emitted at an angle of 0° in the reaction of a ⁵⁶Fe beam (400 MeV) on a ²³⁸U target were measured using a high-resolution magnetic analyzer (MAVR setup). The emission of these particles was observed in a wide energy range, up to 120–130 MeV. Several mechanisms for the formation of these nuclei associated with the processes of multinucleon transfer and incomplete fusion were proposed based on an analysis of the kinematic limits of the exit channels and the application of the moving source model.

A brief overview of the results and methods for conducting radiobiological experiments to study the patterns of flash effect at the linear proton accelerator of INR RAS is presented. An increase in apoptosis of tumor cells compared to normal cells was found when the dose rate increased to extreme values.

Experimental results on spatial correlations of charged particles in ¹²⁴Xe+W interactions at the energy of 3 GeV/nucleon obtained at the Nuclotron internal target station are presented. The simulation of the experimental setup detectors has been performed using the Geant4 software package and the PHQMD event generator.

The results of theoretical analysis of experimental data on the cross-sections of elastic scattering of ⁷Li+¹⁰B and the neutron transfer reaction in collisions of these nuclei, which were obtained at the beam energy of E_LAB=58 MeV at the U-400 cyclotron in the Flerov Laboratory of Nuclear Reactions of the Joint Institute for Nuclear Research, are presented. The calculations of the cross-sections were carried out based on a microscopic model of optical potential and the method of distorted waves.

The photoneutron partial reaction cross sections (γ, 1n) and (γ, 2n) on ⁵²Cr and ⁹⁰Zr obtained using corrections calculated on the base of statistical theory to the neutron yield cross sections σ(γ, xn) = σ(γ, 1n) + 2σ(γ, 2n) determined in experiments carried out on the beams of bremsstrahlung were analyzed using objective physical criteria of data reliability. The reasons that experimental data for ⁹⁰Zr satisfy physical criteria but there are serious doubts in reliability of data for ⁵²Cr, are discussed.

The possibility of single- and tri-nucleon decays that violate baryon number conservation is predicted in several extensions of the Standard Model. The main goal of the GERDA experiment was to search for neutrinoless double beta decay of ⁷⁶Ge. In addition, other important results of GERDA were obtained in searching for various processes beyond the Standard Model. They include the search for a possible manifestation of inclusive, mode-independent decays of single neutrons and protons, as well as certain modes of tri-nucleon decay in ⁷⁶Ge nucleus. The results of such investigations are presented.

Wave functions of the ground state of the ¹²C and ⁶Li nuclei in the α-cluster model are calculated using Feynman’s path integrals and hyperspherical functions. The energy of separation to α-particles and the charge distributions were calculated and agreement with experimental data was obtained. In addition, the shell model of the deformed nuclei is used to calculate the nucleon states in the ¹²C nucleus for comparison against α-cluster model.

The results on the pp-scattering simulation at the total energy up to 27 GeV for the Beam—Beam Counter at SPD are presented. The simulation has been performed using the Pythia8 generator under SPDRoot framework. The estimations of the magnetic field influence on the inclusively charged particles production asymmetries and on the Beam—Beam Counter loads have been obtained.

We considered the problem of theoretical description of the fission fragment formation within the framework of an extended Vicsek-type collective model. The non-mean-field approach is based on microscopic modeling of the nucleon clustering as a phenomenon of particle aggregation due to short-range mutual interaction. Numerical computer simulations were carried out for the ²⁰⁸Pb cluster, observed experimentally in the multimodal fission of heavy and superheavy nuclei.

In the nonequilibrium hydrodynamic approach, a description of the experimental data of ITEP on double differential cross sections of the emission of ¹¹Be and ¹²B nuclei at an angle of 3.5° in the reaction ¹²C+⁹Be→ → f+X at an energy of 300 MeV per nucleon for incident carbon nuclei is obtained. A comparison with other models is made and the dynamics of the fragmentation process is analyzed.

The simultaneous measurements of the angular distributions of fragments and the fission cross section of ²³⁷Np by neutrons in the energy range from 0.3 MeV to 500 MeV were carried out on the neutron time-of-flight spectrometer GNEIS at the Petersburg Nuclear Physics Institute of NRC "Kurchatov Institute". We presented a brief description of the experimental setup and compares the data obtained with the results of experiments performed earlier.

We compared the results of the EPOS4 and UrQMD 3.4 (LHC) event generators using the example of pp-collisions at ultra-high energies (7 TeV). Violation of the laws of conservation of baryon and lepton charges and conservation of energy in EPOS4 is shown. A comparison with experimental data is made, the influence of event filtering by conservation of energy and baryon and lepton charges on the multiplicity distribution in the pseudorapidity range |η| ≤ 1.5 is studied.