D. N. Rassadov

Publications (3)4.75 Total impact

• Source

  Available from: Nikolay Konstantinovich Skobelev

  Article: Isomeric ratios for and from fusion and transfer in the interaction of 6He with 197Au

  A A Kulko, N A Demekhina, R Kalpakchieva, N N Kolesnikov, V G Lukashik, Yu E Penionzhkevich, D N Rassadov, N K Skobelev
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  ABSTRACT: Excitation functions and isomeric cross-section ratios have been measured for the isomeric pairs 198m,gTl, 196m,gTl, 198m,gAu and 196m,gAu, formed in fusion–evaporation and transfer processes in reactions of 6He with 197Au in the energy range 7–60 MeV. The population probability of high- and low-spin states in the fusion reaction with the formation of 198Tl and 196Tl (Jπm = 7+, Jπg = 2−), as well as of the transfer products 198Au and 196Au (Jπm = 12−, Jπg = 2−) is compared with calculations within the statistical model and with similar results, obtained in reactions induced by other nuclei.
  Journal of Physics G Nuclear and Particle Physics 10/2007; 34(11):2297. · 4.18 Impact Factor
• Article: Excitation functions for complete-fusion and transfer reactions in 4He interaction with 197Au nuclei

  A. A. Kulko, N. A. Demekhina, R. Kalpakchieva, Yu. A. Muzychka, Yu. E. Penionzhkevich, D. N. Rassadov, N. K. Skobelev, D. A. Testov
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  ABSTRACT: Excitation functions are measured for the fusion reactions 197Au(4He, xn)201−xn Tl that are induced by alpha-particle interaction with gold nuclei in the energy range 14–36 MeV and in which x neutrons (0 ≤ x ≤ 3) are evaporated. The stack-activation technique was used to record and separate reaction products. Experimental data on the fusion reactions followed by evaporation of one to three neutrons agree with results of previous studies. For the radiative-capture reaction 197Au(4He,γ)201Tl, the upper limit on the cross section proved to be much lower. The excitation functions for the reactions subjected to measurements are compared with the results of calculations based on the statistical model and with the results of an experiment performed previously in a 6He beam.
  Physics of Atomic Nuclei 03/2007; 70(4):613-618. · 0.57 Impact Factor
• Article: Some peculiarities in the interaction of 6He with 197Au and 206Pb

  Yu. E. Penionzhkevich, R. A. Astabatyan, N. A. Demekhina, Z. Dlouhy, R. Kalpakchieva, A. A. Kulko, S. P. Lobastov, S. M. Lukyanov, E. R. Markaryan, V. A. Maslov, Yu. A. Muzychka, Yu. Ts. Oganessian, D. N. Rassadov, N. K. Skobelev, Yu. G. Sobolev, V. Yu. Ugryumov, J. Vincour, T. Zholdybaev
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  ABSTRACT: Excitation functions were measured for fusion followed by the evaporation of neutrons in the reactions 206Pb(6He, 2 n )210Po and 197Au(6He, xn)203−xn T1, where x = 2−7, as well as for the transfer reactions on a 197Au target with the formation of the 196Au, 198Au, and 199Au isotopes. The experiment was carried out at the Dubna Radioactive Ion Beams (DRIBs) complex of FLNR, JINR. The 6He beam intensity was about 5 × 106 pps, the maximum energy being (60.3 ± 0.4) MeV. A significant increase in the cross section was observed below the Coulomb barrier for the fusion reaction with the evaporation of two neutrons compared to statistical model calculations. Unusual behavior for the production of 198Au is observed, whereas the cross section for the formation of 199Au is very low. The analysis of the data in the framework of the statistical model for the decay of excited nuclei, which took into account the sequential fusion of 6He, has shown good agreement between the experimental and calculated values of the cross sections for the case of sub-Coulomb-barrier fusion in the 206Pb + 6He reaction.
  Physics of Particles and Nuclei Letters 01/2006; 3(6):362-367.