Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Rakityansky, S. A."'
Autor:
Rakityansky, S. A.
Publikováno v:
Phys.Rev. C, vol.110, 024001 (2024)
A simple analytic expression of the three-body wave function describing the system $(\alpha\alpha n)$ in the ground state $\frac{3}{2}^-$ of ${}^9\mathrm{Be}$ is obtained. In doing this, it is assumed that the $\alpha$ particles interact with each ot
Externí odkaz:
http://arxiv.org/abs/2407.17371
The available R-matrix parametrization of experimental data on the excitation functions for the elastic and inelastic p-Be7 scattering at the collision energies up to 3.4 MeV is used to generate the corresponding partial-wave cross sections in the st
Externí odkaz:
http://arxiv.org/abs/1901.07391
Autor:
Rakityansky, S. A., Ershov, S. N.
Experimental data on the n-alpha and dt collisions in the quantum state J^pi=3/2+ near the dt-threshold are fitted using the semi-analytic multi-channel Jost matrix with proper analytic structure and some adjustable parameters. Then the spectral poin
Externí odkaz:
http://arxiv.org/abs/1807.00209
Autor:
Vaandrager, P., Rakityansky, S. A.
Publikováno v:
International Journal of Modern Physics E, Vol. 25, No. 2 (2016) 1650014 (12 pages)
A new parametrization of the multi-channel S-matrix is used to fit scattering data and then to locate the resonances as its poles. The S-matrix is written in terms of the corresponding "in" and "out" Jost matrices which are expanded in the Taylor ser
Externí odkaz:
http://arxiv.org/abs/1603.01718
Publikováno v:
Phys. Rev. C 93(3) 034622 (2016)
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 needed to tunnel through the ba
Externí odkaz:
http://arxiv.org/abs/1603.01723
Akademický článek
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Autor:
Belyaev, V. B.1 (AUTHOR), Rakityansky, S. A.1,2 (AUTHOR) rakitsa@up.ac.za, Gopane, I. M.2 (AUTHOR)
Publikováno v:
Few-Body Systems. Mar2023, Vol. 64 Issue 1, p1-12. 12p.
Autor:
Rakityansky, S. A., Elander, N.
The matrix elements of the multi-channel Jost matrices are written in such a way that their dependencies on all possible odd powers of channel momenta are factorized explicitly. As a result the branching of the Riemann energy surface at all the chann
Externí odkaz:
http://arxiv.org/abs/1210.5995
Autor:
Rakityansky, S. A., Elander, N.
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, similarly to the standard effective range expansion. In or
Externí odkaz:
http://arxiv.org/abs/1201.0172
Autor:
Rakityansky, S. A., Elander, N.
Publikováno v:
Int. J. Quant. Chemistry, vol.106, 1105-1129 (2006)
A two-channel problem is considered within a method based on first order differential equations that are equivalent to the corresponding Schr\"odinger equation but are more convenient for dealing with resonant phenomena. Using these equations, it is
Externí odkaz:
http://arxiv.org/abs/1110.4990