86 research outputs found
Mass distributions for quasifission processes in superheavy compositesystems with Z=108-120
No full textThis paper presents the study of mass-energy distributions of quasifission fragments obtained in the reactions 36S, 48Ca, 64Ni+238U at energies below and above the Coulomb barrier. To describe the quasifission mass distribution the simple model has been proposed. This model is based on the driving potential of the system and time dependent mass drift. This procedure allows to estimate QF time scale from the measured mass distributions
Mass distributions for quasifission processes in superheavy compositesystems with Z=108-120
No full textThis paper presents the study of mass-energy distributions of quasifission fragments obtained in the reactions 36S, 48Ca, 64Ni+238U at energies below and above the Coulomb barrier. To describe the quasifission mass distribution the simple model has been proposed. This model is based on the driving potential of the system and time dependent mass drift. This procedure allows to estimate QF time scale from the measured mass distributions
FUTURE PROSPECTS FOR THE SYNTHESIS AND STUDY OF THE PROPERTIES OF SHE. FACTORY OF SUPERHEAVY ELEMENTS
No full text
Fusion-Fission of superheavy compound nuclei produced in reacions with heavy ions beyond Ca
No full textTotal Kinetic Energy - Mass distributions of fission-like fragments for the reactions of 22Ne, 26Mg, 36S, 48Ca, 58Fe and 64Ni ions with actinides leading to the formation of superheavy compound systems with Z=108-120 at energies near the Coulomb barrier have been measured. Fusion-fission cross sections were estimated from the analysis of mass and total kinetic energy distributions. It was found that the fusion probability drops by three orders of magnitude for the formation of the compound nucleus with Z=120 obtained in the reaction 64Ni+238U compared to the formation of the compound nucleus with Z=112 obtained in the reaction 48Ca+238U at the excitation energy of the compound nucleus of about 45 MeV. From our analysis it turns out that the reaction 64Ni+238U is not suitable for the synthesis of element Z=120
Fusion suppression in mass-asymmetric reactions leading to Ra compound nuclei
No full textNear-barrier excitation functions have been measured for evaporation-residue production and fission in the 12C+204,206,208Pb and 48Ca+168,170Er systems that lead to the compound nuclei 216,218,220Ra*. A pronounced suppression of evaporation-residue production is observed for the more symmetric combinations, 48Ca+168,170Er. We relate this to the significant quasifission components already observed for these systems
Uniconf: An alternative conformer generator with broad applicability
No full textThe Uniconf program aimed at conformational search/sampling in molecular clusters and isolated molecules with rotatable bonds has been developed. Unlike the other approaches, the spatial structural diversity of generated conformations is prioritized over targeting a semiempirical method or a force field minimum energy structures. The code is tested in generating of the gas-phase conformers for transition metal complexes, biologically active oligopeptides, and sodium ion microsolvated clusters. In one third of cases, either more or equally stable conformers compared to the previously found ones were generated. Energetically more diverse structures than available in the literature were obtained for practically all compounds.Prof. Vidar R. Jensen, University of Bergen, Norway, is deeply acknowledged for bringing our attention to the conformational search problem. The author gratefully acknowledges Prof. Luigi Cavallo, King Abdullah University of Science and Technology and Dr. Edrisse Chermak, SABIC, Saudi Arabia, and Dr. Arseniy A. Otlyotov, Dr. Daniil Itkis, Prof. Lada V. Yashina, and Andrey D. Moshchenkov, N. N. Semenov Federal Research Center for Chemical Physics RAS, Moscow, Russia for many insightful discussions. The anonymous reviewers of this work are gratefully acknowledged for their valuable comments and suggestions. The work was financially supported by the Russian Science Foundation (project 24-23-00301)
Fission dynamics for capture reactions in Ni + Pb systems
No full textThis paper questions the actual role of on-line edition within international conflicts and measures the power of information. The case study deals with Kosovo and brings about a cross-analysis of the Serbian and Albanian web sites as well as the on-line media edited by the Kosovo diaspora
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