Nature of Coulomb shifts of nuclear scattering resonances

Takibayev, N.

doi:10.1134/1.1992569

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…As was shown in Ref. [38], the effects of the Coulomb forces on resonance states even in two-cluster systems are not trivial. Here, we deal with the three-cluster system projected onto a set of two-cluster channels.…”

Section: Effects Of Coulomb Forcesmentioning

confidence: 76%

Microscopic Description of 8Li and 8B Nuclei within a Three-Cluster Model

2017

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The theoretical analysis of structures of the bound and resonance states in 8 Li and 8 B nuclei is performed within a three-cluster microscopic model. In the framework of this model, 8 Li and 8 B nuclei are considered as three-cluster configurations 4 + 3 + and 4 + 3 + , respectively. A distinguished peculiarity of the model is that it allows us to consider the polarizability of weakly bound nuclei such as 7 Li composed of an alpha particle and a triton or 7 Be composed of an alpha particle and 3 He. Gaussian and oscillator bases are used to expand the three-cluster wave function and to represent the many-channel Schrödinger equation in a matrix form. The main attention of the present study is paid to the effects of cluster polarization on the spectrum of bound and resonance states of 8 Li and 8 B and on the elastic and inelastic + 7 and + 7 scattering. It is shown that the cluster polarization has a great impact on parameters of the bound and resonance states in 8 Li and 8 B. For instance, it decreases the energy of resonance states by 0.7-2.0 MeV and increases their lifetime by more than three times. The roles of spin-orbital and Coulomb interactions in the formation of the spectrum of excited states in nuclei 8 Li and 8 B are studied in detail. In particular, it is found out that the Coulomb forces shift up the energy of resonance states in 8 B with respect to the position of corresponding resonance states in 8 Li and increases their widths.

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Section: Effects Of Coulomb Forcesmentioning

confidence: 76%

Microscopic Description of 8Li and 8B Nuclei within a Three-Cluster Model

2017

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“…As was shown in Ref. [33] effects of the Coulomb forces on resonance states even in two-cluster systems are not trivial. Here we deal with three-cluster system projected onto a set of two-cluster channels.…”

Section: These Figures and Tablementioning

confidence: 77%

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

et al. 2020

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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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“…Indeed, Coulomb repulsion is of particular importance for low-energy resonances, since it reduces the probability for charged particles to approach each other closely and, hence, the probability of their nuclear interactions. Moreover, Coulomb repulsion can deform a resonance substantially -for example, push it to the region of higher energies [16], [17].…”

Section: B the Separable α α-Potentialsmentioning

confidence: 99%

“…Meanwhile in case of attractive shot-range potentials the Coulomb shifts of resonance levels can be very essensial [17].…”

Section: B the Separable α α-Potentialsmentioning

confidence: 99%

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Neutron catalysis of resonance fusion in stellar matter

Takibayev¹

2005

AIP Conference Proceedings

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Within the framework of resonance fusion study in stellar matter the features of n, α, α -system have been investigated at astrophysical energies. Consideration of three body scattering has been carried out on base of well-known Faddeev's equations.It is found that under certain conditions the series of resonance states appear in n, α, α system at very low energies (∼ keV ). The lifetimes of these three body resonances are close to the lifetime of unstable nucleus 8 Be.The ground state of α, α -system is regarded as very narrow resonance with the energy ∼ 92 keV and the width ∼ 6.8 eV. The simple forms of two body repulsive potentials are taken into account to describe the parameters of the α, α -resonance and to satisfy n, α scattering data at very low energies.The explanation of resonance phenomena in n, α, α -system is offered on base of physical model. The effect results from resonance quantum phenomena in few body dynamics.In turn, the resonance fusion can give influence on many astrophysical phenomena. The possibility of catalyzing this new mode of fusion by free neutrons in α-particle matter is considered too in present exposal.

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Nature of Coulomb shifts of nuclear scattering resonances

Cited by 4 publications

References 7 publications

Microscopic Description of 8Li and 8B Nuclei within a Three-Cluster Model

Microscopic Description of 8Li and 8B Nuclei within a Three-Cluster Model

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

Neutron catalysis of resonance fusion in stellar matter

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