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51.
Theoretical and Experimental Chemistry - 相似文献
52.
I. M. Itkis G. N. Knyazheva E. M. Kozulin 《Bulletin of the Russian Academy of Sciences: Physics》2018,82(6):643-647
To investigate the impact shell effects have in the formation of neutron-rich fragments in multinucleon transfer reactions, a series of experiments to explore the binary channel in 156,160Gd + 186W reactions at energies near and above the Coulomb barrier is performed at the Flerov Laboratory’s U-400 accelerator using the CORSET setup. These experiments are aimed mainly at obtaining the production cross sections of leadlike fragments in the process of inverse quasifission. The mass, energy, and angular distributions of the binary reaction products are measured at energies of 860 and 935 MeV of 160Gd ions and 878MeV in the case of 156Gd ions. The excitation energies of primary fragments are estimated using their measured mass–energy distributions. Enhanced yields of products with masses of 200–215 amu are observed for both reactions. At energies above the barrier for side-to-side collisions (935 MeV), the yield of lead-like fragments is an order of magnitude larger than at energies near the Coulomb barrier, due possibly to the influence of orientation effects. The enhancement observed in the yield of reaction products with masses heavier than the target mass confirms that multinucleon transfer reactions can be used to obtain new neutron-rich isotopes, and to synthesize new superheavy elements. 相似文献
53.
Sharkeev Yu. P. Legostaeva E. V. Vavilov V. P. Skripnyak V. A. Belyavskaya O. A. Eroshenko A. Yu. Glukhov I. A. Chulkov A. O. Kozulin A. A. Skripnyak V. V. 《Russian Physics Journal》2019,62(8):1349-1356
Russian Physics Journal - The stage-like character of the stress-strain curves and microstructure in the fracture zone of coarse-grained and ultrafine-grained specimens of the VT1-0 and... 相似文献
54.
55.
The Raman scattering spectrum of SbCl3 has been studied at various temperatures. The correlation between this spectrum and NQR data permits an identification of the low SbCl3 frequencies and an evaluation of the temperature dependence of the asymmetry parameter of the electric-field gradient.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii Fizika, No. 1, pp. 85–88, January, 1970.The authors thank professor A. V. Sechkarev for furnishing us the opportunity to obtain the experimental results in his laboratory. 相似文献
56.
A. S. Babaev V. N. Demidenko Yu. S. Vladimirov D. F. Kitaev V. K. Svechnikov A. T. Kozulin A. V. Gogolev V. I. Karmanov S. N. Mikov V. M. Chetverikov É. I. Gordienok A. A. Rodionov N. I. Baulin A. A. Vorob'ev V. D. Evseev V. I. Koval'chuk A. N. Kogut A. G. Mikolaichuk 《Russian Physics Journal》1978,21(8):1108-1112
57.
A. Di Nitto E. Vardaci A. Brondi G. La Rana R. Moro P. N. Nadtochy M. Trotta A. Ordine A. Boiano M. Cinausero E. Fioretto G. Prete V. Rizzi D. V. Shetty M. Barbui D. Fabris M. Lunardon G. Montagnoli S. Moretto G. Viesti N. Gelli F. Lucarelli G. N. Knyazheva E. M. Kozulin 《The European Physical Journal A - Hadrons and Nuclei》2011,47(6):1-14
Light charged particle (LCP) emission in the evaporation residue (ER) and fusion fission (FF) channels have been studied for the 200 MeV 32S + 100Mo reaction, leading to 132Ce composite nuclei at E x =122 MeV. The main goal was to study the decay of 132 Ce on the basis of an extended set of observables, to get insights on the fission dynamics. The proton and alpha particle energy spectra, their multiplicities, ER-LCP angular correlations, ER and FF angular distributions, and ER and FF cross-sections were measured. The measured observables were compared with the Statistical Model (SM). Using standard parameters, the model was able to reproduce only the pre-scission multiplicities and the FF and ER cross-sections. The calculation was observed to strongly overestimate the proton and alpha particle multiplicities in the ER channel. Disagreements were also observed for the ER-LCP correlations, the LCP energy spectra and the ER angular distribution. By varying the SM input parameters over a wide range of values, it is shown that it is not possible to reproduce all the observables simultaneously with a unique set of parameters. The inadequacy of the model in reproducing the ER particle multiplicities is also observed analysing data from the literature for other systems in the A ≈ 150 and E x ≈ 100?200 MeV region. These results indicate serious limitations about the use of the SM in extracting information on fission dynamics. 相似文献
58.
V. I. Zagrebaev S. G. Zemlyanoy E. M. Kozulin Yu. Kudryavtsev V. Fedosseev R. Bark Z. Janas H. A. Othman 《Hyperfine Interactions》2014,227(1-3):181-189
The present limits of the upper part of the nuclear map are very close to stability while the unexplored area of heavy neutron-rich nuclides along the neutron closed shell N = 126 is extremely important for nuclear astrophysics investigations and, in particular, for the understanding of the r-process of astrophysical nucleosynthesis. This area of the nuclear map can be reached neither in fusion–fission reactions nor in fragmentation processes widely used nowadays for the production of exotic nuclei. A new way was recently proposed for the production of these nuclei via low-energy multi-nucleon transfer reactions. The estimated yields of neutron-rich nuclei are found to be significantly high in such reactions and several tens of new nuclides can be produced, for example, in the near-barrier collision of 136Xe with 208Pb. A new setup is proposed to produce and study heavy neutron-rich nuclei located along the neutron closed shell N = 126. 相似文献