NPCS Vol.23, no.4 (2020), pp. 357-460 https://elib.bsu.by:443/handle/123456789/274595 2026-04-21T09:11:46Z 2026-04-21T09:11:46Z Chernichenko, Yu. D. Kaptari, L. P. Solovtsova, O. P. https://elib.bsu.by:443/handle/123456789/274624 2025-10-02T09:32:39Z 2020-01-01T00:00:00Z

Заглавие документа: On Threshold Resummation S-Factor for a System of Two Relativistic Spinor Particles with Arbitrary Masses Авторы: Chernichenko, Yu. D.; Kaptari, L. P.; Solovtsova, O. P. Аннотация: We present a new threshold resummation S-factor obtained for a composite system of two relativistic spin 1/2 particles of arbitrary masses interacting via a Coulomb-like chromodynamical potential. The analysis is performed in the framework of a relativistic quasipotential approach in the Hamiltonian formulation of the quantum field theory in the relativistic configuration representation. The pseudoscalar, vector, and pseudovector systems are considered. The difference in the behavior of the S-factor for these cases is discussed. A connection between the new and the previously obtained S-factors for spinless particles of arbitrary masses and relativistic spinor particles of equal masses is established.

2020-01-01T00:00:00Z Burov, L. I. Krylova, L. G. https://elib.bsu.by:443/handle/123456789/274623 2025-10-02T09:32:39Z 2020-01-01T00:00:00Z

Заглавие документа: Optimization of the Parameters of a Compact Laser Microchip Based on Nd:LSB with Cr:YAG Saturable Absorber Авторы: Burov, L. I.; Krylova, L. G. Аннотация: Two models of Nd:LSB microchip laser with Cr:YAG saturable absorber have been compared: the travelling wave model and the point model which is deduced from the first one by averaging of all characteristics over the resonator length. It has been shown that the point model is applicable only for a narrow range of laser parameters, in other cases the results of simulations based on these two models differ significantly.

2020-01-01T00:00:00Z Shaparau, V. A. Kuvshinov, V. I. https://elib.bsu.by:443/handle/123456789/274622 2025-10-02T09:32:39Z 2020-01-01T00:00:00Z

Заглавие документа: Nonperturbative Squeezed and Entangled Collinear Gluon States Авторы: Shaparau, V. A.; Kuvshinov, V. I. Аннотация: We consider for the first time nonperturbative gluon state evolution up to the second order of smallness in time. Investigating gluon fluctuations at the nonperturbative stage we have proved theoretically the possibility of the existence of both single- and two-mode gluon squeezed states. The emergence of such remarkable states becomes possible owing to three-and four-gluon self-interactions. The three-gluon self-interaction leads to the squeezing effect at the next time stage of nonperturbative evolution. We have shown that the nonperturbative evolution during a short time leads both to colour squeezing and entanglement of gluons.

2020-01-01T00:00:00Z Korbut, T. N. Bobkova, M. V. Rudak, E. A. Zubets, I. A. https://elib.bsu.by:443/handle/123456789/274620 2025-10-02T09:32:39Z 2020-01-01T00:00:00Z

Заглавие документа: Neutron and Neutron-Breeding Medium Interaction Process Description Within the Physical Birth-and-Death Model Авторы: Korbut, T. N.; Bobkova, M. V.; Rudak, E. A.; Zubets, I. A. Аннотация: Analytic methods for nuclear reactor physics problems are still of current interest. They allow the physical interpretation to be obtained for studied processes within simple mathematical apparatus. This work proposes a new approach of neutron and neutron-breeding medium interaction process description based on birth-and-death model. This approach was named the physical birth-and-death model. The equations for the main kinetic characteristic are presented and reactivity values are estimated for two subcritical nuclear assemblies: MASURCA and KUCA.

2020-01-01T00:00:00Z