2018 год
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№ |
Название статьи |
Авторы |
Год |
Название журнала |
Краткая аннотация |
| 1 |
Effects of non-linear electrodynamics of vacuum in the magnetic quadrupole field of a pulsar |
Abishev, M.E., Toktarbay, S., Beissen, N.A., Kudussov, A.S., Abylayeva, A.Z, et al. |
2018 |
Monthly Notices of the Royal Astronomical Society, 2018, 481(1), стр. 36–43, Q1 |
In this work, the non-linear effect of the magnetic dipole and quadrupole fields on the propagation of electromagnetic waves in the eikonal approximation of the parametrized post-Maxwell electrodynamics of the vacuum is calculated. Equations of motion for electromagnetic pulses transmitted in a strong magnetic field of a pulsar by two normal modes with mutually orthogonal polarization are constructed. The difference Δt in propagation times of normal waves from the common source of electromagnetic radiation to the receiver is calculated. It is shown that the forward part and the 'tail' by length cΔt of any hard radiation pulse due to the non-linear electromagnetic influence of the magnetic dipole and quadrupole fields turn out to be linearly polarized in mutually perpendicular planes, and the remaining part of the pulse must have elliptical polarization. |
| 2 |
The evaluation of electromagnetic forward radiations during the propagation of gravitational waves through the dipole field of the magnetar |
Abishev, M.E., Denisov, V.I., Denisova, I.P., Kechkin, O.V. |
2018 |
Astroparticle Physics, 2018, 103, стр. 94–97, Q2 |
The calculations of electromagnetic radiation, caused by a plane gravitational wave propagating in a magnetic dipole fields, have been performed. It is shown that a radiated electromagnetic wave has the frequency of the gravitational wave, and its amplitude is proportional to the square of that frequency. Polarization of the arising electromagnetic wave coincides with the polarization of the gravitational wave. Based on an example of how a gravitational wave propagates in a magnetar's magnetic dipole field, an evaluation of a conversion coefficient of gravitational waves into electromagnetic waves has been made: the required amplitude of a gravitational wave for on-Earth detection of electromagnetic radiation has been calculated as well. |
| 3 |
Beyond Starobinsky inflation |
Aldabergenov, Y., Ishikawa, R., Ketov, S.V., Kruglov, S.I. |
2018 |
Physical Review D, 2018, 98(8), 083511, Q1 |
A supergravity extension of the (R+R2) gravity with the additional (Born-Infeld) structure of a massive vector multiplet gives rise to the specific F(R) gravity, whose structure is investigated in detail. The massive vector multiplet has an inflaton (scalaron), goldstino, and massive vector field as its field components. The model describes Starobinsky inflation and allows us to extrapolate the F(R) function beyond the inflationary scale (up to Planck scale). We observe some differences versus the (R+R2) gravity and several breaking patterns of the well-known correspondence between the F(R) gravity and the scalar-tensor gravity. |
| 4 |
General couplings of a vector multiplet in N = 1 supergravity with new FI terms |
Aldabergenov, Y., Ketov, S.V., Knoops, R. |
2018 |
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2018, 785, стр. 284–287, Q2 https://doi.org/10.1016/j.physletb.2018.07.072
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We propose new interactions of a (massive) vector multiplet with chiral multiplets and (D-type) spontaneously broken supersymmetry in four-dimensional N=1 supergravity, due to the generalized Fayet–Iliopoulos (FI) terms. Our actions are invariant under linearly realized off-shell supersymmetry and Kähler–Weyl transformations. We compute the scalar potentials and pinpoint some physical restrictions arising in this approach. |
| 5 |
Massive vector multiplet with Dirac-Born-Infeld and new Fayet-Iliopoulos terms in supergravity |
Abe, H., Aldabergenov, Y., Aoki, S., Ketov, S.V. |
2018 |
Journal of High Energy Physics, 2018, 2018(9), 94, Q1 https://doi.org/10.1007/JHEP09(2018)094
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We propose a four-dimensional N = 1 supergravity-based Starobinsky-type inflationary model in terms of a single massive vector multiplet, whose action includes the Dirac-Born-Infeld-type kinetic terms and a generalized (new) Fayet-Iliopoulos-type term, without gauging the R-symmetry. The bosonic action and the scalar potential are computed. The inflaton is the superpartner of the Goldstino in our model, and supersymmetry is spontaneously broken after inflation by the D-type mechanism, whose scale is related to the value of the cosmological constant. |
| 6 |
Nonrelativistic energy levels of helium atoms |
Aznabaev, D.T., Bekbaev, A.K., Korobov, V.I. |
2018 |
Physical Review A, 2018, 98(1), 012510, Q2 |
The nonrelativistic ionization energy levels of a helium atom are calculated for S, P, D, and F states. The calculations are based on the variational method of "exponential" expansion. The convergence of the calculated energy levels is studied as a function of the number of basis functions N. This allows us to claim that the obtained energy values (including the values for the states with a nonzero angular momentum) are accurate up to 28-35 significant digits. Calculations of the nonrelativistic ionization energy of the negative hydrogen ion H- are also presented. |
| 7 |
Neutron halos in the excited states of B 12 |
Belyaeva, T.L., Goncharov, S.A., Demyanova, A.S., Janseitov, D., Mukhamejanov, E., et al. |
2018 |
Physical Review C, 2018, 98(3), 034602, Q2 |
The differential cross sections of the B11(d,p)B12 reaction leading to formation of the 1+ ground state and the 0.95-MeV 2+, 1.67-MeV 2-, 2.62-MeV 1-, 2.72-MeV 0+, and 3.39-MeV 3- excited states of B12 are measured at Ed = 21.5 MeV. The analysis of the data is carried out within the coupled-reaction-channels method for the direct neutron transfer and the Hauser-Feshbach formalism of the statistical compound-nucleus model. The spectroscopic factors, asymptotic normalization coefficients, and rms radii of the last neutron in all states studied are deduced. The existence of the neutron halos in the 1.67-MeV 2- and 2.62-MeV 1- states is found, consistent with the earlier published data. New information about the enlarged rms radii of the last neutron in the 2.72-MeV 0+ (5.7 fm) and the unbound 3.389-MeV 3- (5.9 fm) states of B12 was obtained, resulting in the possible existence of neutron halo-like states in B12. |
| 8 |
Non-validity of I-Love-Q relations for HotWhite dwarf stars |
Boshkayev, K., Quevedo, H. |
2018 |
Monthly Notices of the Royal Astronomical Society, 2018, 478(2), стр. 1893–1899, Q1 |
The equilibrium configurations of uniformly rotating white dwarfs at finite temperatures are investigated, exploiting the Chandrasekhar equation of state for different isothermal cores. The Hartle-Thorne formalism is applied to construct white dwarf configurations in the framework of Newtonian physics. The equations of structure are considered in the slow-rotation approximation and all basic parameters of rotating hot white dwarfs are computed to test the so-called moment of inertia, tidal Love number, and quadrupole moment (I-Love-Q) relations. It is shown that even within the same equation of state the I-Love-Q relations are not universal for white dwarfs at finite temperatures. |
| 9 |
Simultaneous observation of lightning emission in different wave ranges of electromagnetic spectrum in Tien Shan mountains |
Gurevich, A.V., Garipov, G.K., Almenova, A.M., Kalikulov O.A., Zhukov, V.V., Zybin, K.P., Saduev N.O., et al. |
2018 |
Atmospheric Research, 2018, 211, стр. 73–84, Q1 |
Simultaneous registration of electromagnetic emission generated by atmospheric lightning discharges in the radio-frequency (f = 0.1–30 MHz), infrared (λ = 610–800 nm), ultraviolet (λ = 240–380 nm), and in the soft energy gamma-radiation (Eγ = 0.1–4 MeV) ranges of electromagnetic spectrum was made synchronously in mountain conditions with complex detector system of the Tien Shan High-Mountain Cosmic Ray Station. We discuss preliminary results of these measurements and perspectives of future application of the multispectral investigation technique to study of the effects of thunderstorm activity. |
| 10 |
Dirac and non-Dirac conditions in the two-potential theory of magnetic charge |
Scott, J., Evans, T.J., Singleton, D., Dzhunushaliev, V., Folomeev, V. |
2018 |
European Physical Journal C, 2018, 78(5), 382, Q2 |
We investigate the Cabbibo–Ferrari, two-potential approach to magnetic charge coupled to two different complex scalar fields, Φ 1 and Φ 2, each having different electric and magnetic charges. The scalar field, Φ 1, is assumed to have a spontaneous symmetry breaking self-interaction potential which gives a mass to the “magnetic” gauge potential and “magnetic” photon, while the other “electric” gauge potential and “electric” photon remain massless. The magnetic photon is hidden until one reaches energies of the order of the magnetic photon rest mass. The second scalar field, Φ 2, is required in order to make the theory non-trivial. With only one field one can always use a duality rotation to rotate away either the electric or magnetic charge, and thus decouple either the associated electric or magnetic photon. In analyzing this system of two scalar fields in the Cabbibo–Ferrari approach we perform several duality and gauge transformations, which require introducing non-Dirac conditions on the initial electric and magnetic charges. We also find that due to the symmetry breaking the usual Dirac condition is altered to include the mass of the magnetic photon. We discuss the implications of these various conditions on the charges. |
| 11 |
Wormhole solutions with a complex ghost scalar field and their instability |
Dzhunushaliev, V., Folomeev, V., Kleihaus, B., Kunz, J. |
2018 |
Physical Review D, 2018, 97(2), 024002, Q1 |
We study compact configurations with a nontrivial wormholelike spacetime topology supported by a complex ghost scalar field with a quartic self-interaction. For this case, we obtain regular asymptotically flat equilibrium solutions possessing reflection symmetry. We then show their instability with respect to linear radial perturbations. |
| 12 |
Investigation of the elastic and inelastic scattering of 3He from 9Be in the energy range 30-60 MeV |
Janseitov, D.M., Lukyanov, S.M., Mendibayev, K., Sivaček, I., Glagolev, V., et al. |
2018 |
International Journal of Modern Physics E, 2018, 27(10), 1850089, Q2 |
We have measured the differential cross-sections for the elastic as well as inelastic scattering populating the 2.43MeV (5/2-) excited state in 9Be using 3He beams at energies of 30, 40 and 47MeV on a 9Be target. The experimental results for the elastic scattering were analyzed within the framework of the optical model using the Woods-Saxon and double-folding potentials. The theoretical calculations for the concerned excited states were performed using the coupled-channel method. The optimal deformation parameters for the excited states of 9Be nucleus were extracted. |
| 13 |
Investigation of exotic states of 13C at low energy |
Burtebayev, N., Janseitov, D.M., Kerimkulov, Z., Ogloblin, A.A., Aimaganbetov, A.S., et al. |
2018 |
International Journal of Modern Physics E, 2018, 27(3), 1850025, Q2 |
The differential cross-sections of the elastic and inelastic α +13C scattering have been measured at E(α) = 29MeV. The radii of the exited states: 3.09 (1/2+) and 8.86 (1/2-) MeV were determined using the Modified Diffraction Model. The radii of these excited states are larger than that of the ground state of 13C, confirming the suggestion that the 8.86 (1/2-) MeV state could be an analog of the Hoyle state in 12C and the 3.09 (1/2+) MeV state has a neutron halo. The possibility of coexistence of various exotic states in the structure of the 13C nucleus is shown. |
| 14 |
Elastic and inelastic scattering of α -particles by 2 0 Ne nuclei at energy of 48.8 MeV |
Burtebayev, N., Duisebayev, A., Duisebayev, B.A., Sakuta, S.B., Nassurlla, M., et al. |
2018 |
International Journal of Modern Physics E, 2018, 27(5), 1850042, Q2 |
Differential cross-sections for the elastic and inelastic scattering of α-particles had been measured at the energy of 48.8MeV with excitation of low-lying states of the 20Ne nucleus. The data for transitions to the ground (0+) and excited (Ex = 1.63MeV(2+), Ex = 4.25MeV(4+)) states relating to the ground state band were analyzed in the framework of the optical model and the coupled-channel method based on the rotational model. It is shown that the analysis is sensitive not only to the magnitude, but also to the sign of the quadrupole and hexadecapole deformations. The extracted values of the parameters β2 = +0.54 ± 0.14 and β4 = +0.17 ± 0.06 are in good agreement with the results of other experiments on the scattering of protons, 3He and α-particles and correspond to the data known from the electron scattering and Coulomb excitation. |
| 15 |
Direct experimental detection of spatially localized clusters in nuclei on alpha-particle beams |
Zaripova, Y.A., Dyachkov, V.V., Yushkov, A.V., Zholdybaev, T.K., Gridnev, D.K. |
2018 |
International Journal of Modern Physics E, 2018, 27(2), 1850017, Q2 https://doi.org/10.1142/S0218301318500179
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Direct method for detecting intranuclear clusters of nuclear matter-clusters and determining their effective numbers was developed. The idea of the method is based on the functional coincidence of kinematics for light nuclei in the free state and clusters of the same mass within the nuclear volume. The reliability of the method is additionally confirmed by two experimental methods. The experiments were carried out at the Kazakhstan U-150M accelerator on a beam of α-particles with energy of 29MeV. The first method consists in measuring the half-width of the elastic scattering peak from the angle and a comparison between the differential cross-sections of elastically scattered α particles on free light nuclei and the differential cross-sections obtained by the authors on intranuclear multicluster. Using the second method, the correlation method, an experiment was performed to record the scattered α particle on the 9Be nucleus-matrix and the recoil nucleus identical to it (α particle). Thus, the kinematics of the 4He(α,α) 4He reaction, where 4He is an intranuclear α cluster, indicates the presence of an intranuclear alpha cluster, which is further confirmed by the authors, an experimental measurement of intranuclear multicluster. |
| 16 |
Systematic investigation of the Hoyle-analog states in light nuclei |
Vasilevsky, V.S., Kato, K., Takibayev, N. |
2018 |
Physical Review C, 2018, 98(2), 024325, Q2 |
We investigate resonance states in three-cluster continuum of some light nuclei, Be9, B9, B10, B11, and C11. These nuclei are considered to have a three-cluster configuration consisting of two α particles and a neutron, proton, deuteron, triton, and nucleus He3, respectively. In this study, we make use of two different microscopic three-cluster models. The first model employs the hyperspherical harmonics basis to enumerate channels and describe three-cluster continuum. The second model is the well-known complex scaling method. The nucleon-nucleon interaction is modeled by the semirealistic Minnesota and Hasegawa-Nagata potentials. Our main aim is to find the Hoyle-analog states in these nuclei or, in other words, whether it is possible to synthesize these nuclei in a triple collision of clusters. We formulate the criteria for selecting such states and apply them to resonance states, emerged from our calculations. We found that there are resonance states obeying the formulated criteria which make possible syntheses of these nuclei in a stellar environment. |