Papers by Konstantin Gudima
Physical Review C, 2008
An experimental study of nuclear reactions between 28 Si nuclei at 200 and 300 MeV/nucleon and hy... more An experimental study of nuclear reactions between 28 Si nuclei at 200 and 300 MeV/nucleon and hydrogen or deuterium target nuclei was performed at the CELSIUS storage ring in Uppsala, Sweden, to collect information about the reactions responsible for single-event effects in microelectronics. Inclusive data on 28 Si fragmentation, as well as data on correlations between recoils and spectator protons or α particles are compared to predictions from the Dubna cascade model and the Japan Atomic Energy Research Institute version of the quantum molecular dynamics model. The comparison shows satisfactory agreement for inclusive data except for He fragments where low-energy sub-barrier fragments and recoiling fragments with very large momenta are produced much more frequently than predicted. The yield of exclusive data are also severely underestimated by the models whereas the charge distributions of recoils in these correlations compare well. The observed enhancement in He emission, which may well be important for the description of single-event effects, is most likely to be attributed to α clustering in 28 Si nuclei.
Nuclear Physics A, 2012
Formation of hypernuclei in peripheral collisions of relativistic light and heavy ions is studied... more Formation of hypernuclei in peripheral collisions of relativistic light and heavy ions is studied theoretically within the transport and statistical approaches. New mechanisms for the formation of strange nuclear systems via capture of hyperons by slightly excited spectator matter and their subsequent disintegration are investigated. These processes lead to production of specific and exotic hypernuclei, which may not be accessible in other reactions. Similar mechanisms processing via absorption of strange particles by nuclei can take place in reactions initiated by electrons, antiprotons and other hadrons. It is demonstrated that our approach is consistent with experimental data.
Journal of Physics: Conference Series, 2012
Within the next six years, the Facility for Antiproton and Ion Research (FAIR) is built adjacent ... more Within the next six years, the Facility for Antiproton and Ion Research (FAIR) is built adjacent to the existing accelerator complex of the GSI Helmholtz Center for Heavy Ion Research at Darmstadt, Germany. Thus, the current research goals and the technical possibilities are substantially expanded. With its worldwide unique accelerator and experimental facilities, FAIR will provide a wide range of unprecedented fore-front research in the fields of hadron, nuclear, atomic, plasma physics and applied sciences which are summarized in this article. As an example this article presents research efforts on strangeness at FAIR using heavy ion collisions, exotic nuclei from fragmentation and antiprotons to tackle various topics in this area. In particular, the creation of hypernuclei and antimatter is investigated.
Acta Physica Polonica B, 2012
Two major aspects of strange particle physics at the upcoming FAIR and NICA facilities and the RH... more Two major aspects of strange particle physics at the upcoming FAIR and NICA facilities and the RHIC low energy scan will be discussed. A new distinct production mechanism for hypernuclei will be presented, namely the production abundances for hypernuclei from Λ's absorbed in the spectator matter in peripheral heavy ion collisions. As strangeness is not uniformly distributed in the fireball of a heavy ion collision, the properties of the equation of state therefore depend on the local strangeness fraction. The same, inside neutron stars strangeness is not conserved and lattice studies on the properties of finite density QCD usually rely on an expansion of thermodynamic quantities at zero strange chemical potential, hence at non-zero strange-densities. We will therefore discuss recent investigations on the EoS of strange-QCD and present results from an effective EoS of QCD that includes the correct asymptotic degrees of freedom and a deconfinement and chiral phase transition.
Journal of Physics: Conference Series, 2014
We discuss several new developments in the field of strange and heavy flavor physics in high ener... more We discuss several new developments in the field of strange and heavy flavor physics in high energy heavy ion collisions. As shown by many recent theoretical works, heavy flavored particles give us a unique opportunity to study the properties of systems created in these collisions. Two in particular important aspects, the production of (multi) strange hypernuclei and the properties of heavy flavor mesons, are at the core of several future facilities and will be discussed in detail.
Physics of Atomic Nuclei, 2010
The recoil properties of the product nuclei from the interaction of 2.2 GeV/nucleon 12 C ions fro... more The recoil properties of the product nuclei from the interaction of 2.2 GeV/nucleon 12 C ions from Nuclotron of the Laboratory of High Energies (LHE), Joint Institute for Nuclear Research (JINR) at Dubna with a 118 Sn target have been studied using catcher foils.
Laser and Particle Beams, 2002
The nuclear emulsion method was used to study the charge, energy, momentum, and angular character... more The nuclear emulsion method was used to study the charge, energy, momentum, and angular characteristics of secondary particles from inelastic interactions of âµâ¶Fe nuclei at energies of 1.8 GeV/nucleon with nuclei of Ag and Br. A systematic comparison of the data with calculations was conducted, using the Dubna version of the cascade evaporation model (DCM). It was shown that the DCM adequately describes most of the interaction characteristics for the two nuclei in (âµâ¶Fe+AgBr)-collisions. However, in some cases there are quantitative deviations.
Physics of Atomic Nuclei
A comparative analysis is performed of the predictions of three models of relativistic nucleus-nu... more A comparative analysis is performed of the predictions of three models of relativistic nucleus-nucleus collisions: the partial transparency model, the hydrodynamical model, and the cascade model. The calculated proton spectra are compared with the available experimental data for the initial energies 0.8, 2.1, and 3.6 GeV/nucleon. The effect of the deviation from thermodynamic equilibrium caused by mutual transparency of the
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Papers by Konstantin Gudima