arXiv subjects

A. O. Svetlichnyi

Publications and source records attributed to A. O. Svetlichnyi.

4 recordsLinked to original sources

arXiv2025

Challenge of nuclear transmutation in heavy-ion colliders

We investigate the production of secondary nuclei in the hadronic fragmentation and electromagnetic dissociation (EMD) of $^{20}$Ne beams at the LHC and $^{124}$Xe beams at NICA. For light nuclei at LHC energies, our calculations show that hadronic interactions are the dominant channel for nuclear transmutation. This contrasts with the previously established dominance of EMD in $^{208}$Pb-$^{208}$Pb collisions. For $^{20}$Ne-$^{20}$Ne collisions at $\sqrt{s_{\rm NN}}=5.36$ TeV, we provide calculated cross sections and momentum distributions of produced nuclei such as $^4$He, $^{12}$C, $^{14}$N, and $^{16}$O. These results are essential for assessing potential contamination of the $^{20}$Ne-$^{20}$Ne event sample by collisions involving other nuclear species. Secondary nuclei will be also produced in the EMD of $^{124}$Xe beams at NICA, but they will not contaminate $^{124}$Xe-$^{124}$Xe data.

nucl-th↗

arXiv2025

Benchmarking Hadronic Models in Geant4 for Detector Simulations

The construction of modern detectors used in high-energy physics experiments is typically guided by modeling with the Geant4 toolkit to evaluate detector performance in terms of geometrical acceptance and detection efficiency. Several hadronic models are available in Geant4 for modeling nuclear reactions induced by fast nucleons. It is shown that they result in different multiplicity and charge distributions of secondary particles and nuclear fragments. The impact of these differences on modeling the Highly-Granular Neutron Detector (HGND) prototype for the BM@N experiment at Nuclotron-based Ion Collider fAcility (NICA) is evaluated.

physics.ins-det↗

arXiv2024

Calculations of the cell survival rate after irradiating with minibeams of protons and $^{12}$C

The propagation of minibeams of protons and $^{12}$C in a water phantom was modelled with Geant4 v10.3, and the survival probabilities of human salivary gland cells representing healthy and tumour tissues of normal radiosensitivity were calculated with the modified microdosimetric kinetic model. The advantage of minibeams over homogeneous irradiation in sparing healthy tissues proximal to the tumour was demonstrated. Survival-volume histograms were proposed to quantify the difference in the survival probability of cells inside and outside the minibeam spots.

physics.med-ph↗

arXiv2023

Proton and carbon-ion minibeam therapy: from modeling to treatment

Arrays of minibeams of protons and $^{12}$C in tissue-like media were modeled with Geant4 toolkit. A set of beam energies was used in simulations to provide a Spead-out Bragg peak (SOBP) extended by 6 cm in depth for protons as well as for $^{12}$C. In both cases, beams of 0.3 mm or 0.5 mm FWHM were arranged at the entrance to a water phantom either on a rectangular or an hexagonal grid to compare two kinds of projectiles and different minibeam patterns. Differential and cumulative dose-volume histograms (DVH) were calculated and compared for protons and $^{12}$C as dose uniformity metrics. A uniform dose distribution was easily achieved with protons due to an enhanced lateral scattering of these projectiles in comparison to $^{12}$C. The cumulative DVHs calculated for 0.3 mm or 0.5 mm minibeams almost coincide in the target volume, but diverge for different grid patterns. In contrast, cumulative entry DVHs were found similar for both grid patterns, but different for 0.3 mm and 0.5 mm minibeams.

physics.med-ph↗