Browsing Research Articles (Physics) by Author "Rakityansky, Sergei Anatoljevich"

Browsing Research Articles (Physics) by Author "Rakityansky, Sergei Anatoljevich"

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  • Analytic structure and power series expansion of the Jost function for the two-dimensional problem 
    Rakityansky, Sergei Anatoljevich; Elander, N. (Institute of Physics, 2012-03)
    For a two-dimensional quantum-mechanical problem, we obtain a generalized power series expansion of the S-matrix that can be done near an arbitrary point on the Riemann surface of the energy, similar to the standard ...
  • Analytic structure of the multichannel Jost matrix for potentials with Coulombic tails 
    Rakityansky, Sergei Anatoljevich; Elander, N. (American Institute of Physics, 2013-12-31)
    A quantum system is considered that can move in N two-body channels with the potentials that may include the Coulomb interaction. For this system, the Jost matrix is constructed in such a way that all its dependencies ...
  • Extracting the resonance parameters from experimental data on scattering of charged particles 
    Vaandrager, Paul; Rakityansky, Sergei Anatoljevich (World Scientific Publishing, 2016-02)
    A new parametrization of the multi-channel S S -matrix is used to fit scattering data and then to locate the resonances as its poles. The S S -matrix is written in terms of the corresponding “in” and “out” Jost ...
  • Jost matrices for some analytically solvable potential models 
    Ershov, S.N.; Rakityansky, Sergei Anatoljevich (American Physical Society, 2021-02)
    A family of analytically solvable potential models for the one- and two-channel problems is considered within the Jost matrix approach. The potentials are chosen to be constant in the interior region and to have ...
  • Jost-matrix analysis of experimental data on d 4He scattering 
    Vaandrager, Paul; Rakityansky, Sergei Anatoljevich (Elsevier, 2020-08)
    Please read abstract in the article.
  • A method for extracting the resonance parameters from experimental cross-sections 
    Rakityansky, Sergei Anatoljevich; Elander, N. (World Scientific, 2013)
    Within the proposed method, a set of experimental data points are fitted using a multi-channel S-matrix. Then the resonance parameters are located as its poles on an appropriate sheet of the Riemann surface of the ...
  • Multi-channel analog of the effective-range expansion 
    Rakityansky, Sergei Anatoljevich; Elander, N. (IOP Publishing, 2011)
    Similarly to the standard effective range expansion that is done near the threshold energy, we obtain a generalized power-series expansion of the multi-channel Jost- matrix that can be done near an arbitrary point on the ...
  • Nuclear fusion induced by X-rays in a crystal 
    Belyaev, V.B.; Miller, M.B.; Otto, J.; Rakityansky, Sergei Anatoljevich (American Physical Society, 2016-03-08)
    The nuclei that constitute a crystalline lattice, oscillate relative to each other with a very low energy that is not sufficient to penetrate through the Coulomb barriers separating them. An additional energy, which is ...
  • Partial widths of a multi-channel resonance 
    Rakityansky, Sergei Anatoljevich (IOP Publishing Limited, 2017)
    A new method for finding the partial decay-widths for multi-channel resonances is suggested. It is based on using the Jost matrices. These matrices can be either calculated (when the multi-channel potential is known) or ...
  • Resonant states 3+ and 2− of the Boron isotope 8B 
    Tshipi, T.J.; Rakityansky, Sergei Anatoljevich; Ershov, S.N. (World Scientific Publishing, 2022-08)
    Please read abstract in the article.