arXiv subjects

V. O. Kurmangaliyeva

Publications and source records attributed to V. O. Kurmangaliyeva.

4 recordsLinked to original sources

arXiv2026

On three-cluster resonance structure of hypernuclei $_Λ^{7}$He, $_Λ^{7}$Li and $_Λ^{7}$Be

The bound and resonance states of hypernuclei $_Λ^{7}$He, $_Λ^{7}$Li and $_Λ^{7}$Be are studied within a three-cluster model. Within this model, hypernuclei $_Λ^{7}$He, $_Λ^{7}$Li and $_{Λ}^{7}$Be are considered as three-cluster systems $^{4}$He+$^2n$+$Λ$, $^{4}$He+$d$+$Λ$, $^{4}$He+$^2p$+$Λ$, respectively. Special attention is paid to determining resonance states in the three-cluster continuum of these hypernuclei and to study their nature. One semi-realistic nucleon-nucleon potential is employed to determine the internal structure of the clusters $^{4}$He, $^2n$, $d$ and $^2p$, and their interaction. Three versions of the nucleon-hyperon potential, known as the YNG potential, are employed to determine the interaction of the listed clusters with the lambda hyperon. A set of very narrow and fairly wide resonance states is found in the three-cluster continuum of $_Λ^{7}$He, $_Λ^{7}$Li and $_Λ^{7}$Be. The narrowest resonance states were detected in $_Λ^{7}$He and $_Λ^{7}$Li and their total width does not exceed 10 keV. The dominant decay channels of these resonance states are revealed.

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arXiv2025

Discrete and continuous spectrum of lightest hypernuclei

We analyze the peculiarities of the interaction of the lambda hyperon with s-shell nuclei. The spectra of bound and scattering states are studied in the hypernuclei $_Λ^{2}$H, $_Λ^{3}$H, $_Λ^{4}$H, $_Λ^{4}$He and $_Λ^{5}$He, which is considered as two-cluster configurations $p+Λ$, $d$+$Λ$, $^{3}$H+$Λ$, $^{3}$He+$Λ$, $^{4}$He+$Λ$, respectively. The explicit form of the folding potentials of such an interaction is presented in coordinate and oscillator representations, which help us to understand the structure of hypernuclei of interest. We compare energies of bound states, phase shifts of the elastic lambda hyperon, and neutron scattering from s-shell nuclei.

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arXiv2020

Resonance structure of $^{8}$Be with the two-cluster resonating group method

A two-cluster microscopic model is applied to study elastic alpha-alpha scattering and resonance structure of $^{8}$Be. The model is an algebraic version of the Resonating Group Method, which makes use complete set of oscillator functions to expand wave function of two-cluster system. Interaction between clusters is determined by well-known semi-realistic nucleon-nucleon potentials of Hasegawa-Nagata, Minnesota and Volkov. Detail analysis of resonance wave functions is carried out in oscillator, coordinate and momentum spaces. Effects of the Pauli principle on wave functions of the $^{8}$Be continuous spectrum states are thoroughly studied.

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arXiv2019

Effects of the Coulomb interaction on parameters of resonance states in mirror three-cluster nuclei

We investigate how the Coulomb interaction affects the energy $E$ and width $Γ$ of resonance states in mirror nuclei. We employ a three-cluster microscopic model to determine position of resonance states in two- and three-body continua. Two parameters are introduced to quantify effects of the Coulomb interactions. As the energy and width of the corresponding resonance states of mirror nuclei are displayed on an $E$-$Γ$ plane, these parameters determine a rotation and a dilatation. With the help of these parameters we found resonance states with strong, small and medium effects of the Coulomb interaction. We also found two different scenarios of the motion of resonance states due to the Coulomb interaction. The first standard (major) scenario represent resonance states with the larger energy and larger width than their counterparts have. The second rear scenario includes resonance states with the larger energy but smaller width.

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