Dark solitons in ferromagnetic chains with first- and second-neighbor interactions

We study the ferromagnetic spin chain with both first- and second-neighbor interactions. We obtained the condition for the appearance and stability of bright and dark solitons for arbitrary wave number inside the Brillouin zone. The influence of the second-neighbor interaction and the anisotropy on the soliton properties is considered. The scattering of dark solitons from point defects in the discrete spin chain is investigated numerically.Comment: 7 pages,5 figure

Wave-particle duality of solitons and solitonic analog of the Ramsauer-Townsend effect

We show that the scaling symmetry breaking in soliton scattering reveals the hidden role of the soliton self-interaction (“binding”) energy and its dramatic impact on the wave-particle duality of solitons. Solitonic analog of the de Broglie wavelength and phenomenon similar to the Ramsauer-Taunsend effect can be discovered for Schrödinger solitons

Do exotic alpha-cluster states in 12 C show signatures of alpha-condensate structure? Analysis of recent data on the a -particle inelastic scattering

The diffraction model, DWBA and the Coupled Reaction Channels analysis of the novel data of α + 12C elastic and inelastic (to the states 4.44, 7.65 and 9.64 MeV) scattering in full angular range at an incident energy of 110 MeV is presented. The diffraction radii for the ground and the first excited (4.44 MeV) states are found to be equal. The diffraction radii for the 7.65 and 9.64 MeV states are enhanced by 0.5–0.8 fm. This result shows that the radius of the Hoyle’s 0+ 2 , 7.65 MeV state in 12C is larger by a factor of ∼ 1.2 - 1.3 than that of the ground state. It is demonstrated that the direct transfer of 8Be dominates at large angles in all four reactions reported here and that the relative angular momentum L=0 corresponding to the transfer of 8Be in its ground state 0+ has predominant probability for the 0 + 2 state in comparison with the ground state of 12C. Evidence of existence of some features of alpha-condensed structure of the Hoyle’s 0+ 2 state in 12C was obtained, particularly, its enhanced radius and large contribution of alpha-particle configuration with L =

Do exotic alpha-cluster states in 12 C show signatures of alpha-condensate structure? Analysis of recent data on the a -particle inelastic scattering

The diffraction model, DWBA and the Coupled Reaction Channels analysis of the novel data of α + 12C elastic and inelastic (to the states 4.44, 7.65 and 9.64 MeV) scattering in full angular range at an incident energy of 110 MeV is presented. The diffraction radii for the ground and the first excited (4.44 MeV) states are found to be equal. The diffraction radii for the 7.65 and 9.64 MeV states are enhanced by 0.5–0.8 fm. This result shows that the radius of the Hoyle’s 0+ 2 , 7.65 MeV state in 12C is larger by a factor of ∼ 1.2 - 1.3 than that of the ground state. It is demonstrated that the direct transfer of 8Be dominates at large angles in all four reactions reported here and that the relative angular momentum L=0 corresponding to the transfer of 8Be in its ground state 0+ has predominant probability for the 0 + 2 state in comparison with the ground state of 12C. Evidence of existence of some features of alpha-condensed structure of the Hoyle’s 0+ 2 state in 12C was obtained, particularly, its enhanced radius and large contribution of alpha-particle configuration with L =

The first identification of the proton halo in the excited state of 13N

We demonstrate that the radii of excited nuclear states can be estimated using the ( 3 He, t) charge-exchange reaction and relying on the modified diffraction model.The radius of the 13 N excited state with an excitation energy of E*=2.37 MeV,which lies in a continuous spectrum, is determined. The radius of this state proves to be close to that of the mirror 3.09-MeV state of the 13 C nucleus, which possesses a neutron halo but lies in a discrete spectrum. Thereby, we demonstrate that the 2.37-MeV state of the 13 N nucleus has a proton halo. The analysis is based on published measurements of differential cross sections for relevant reactions

Cluster rotational bands in 11B

Differential cross-sections of 11B+α inelastic scattering at E(α) = 65 MeV leading to most of the known 11B states at excitation energies up to 14 MeV were measured [1]. The data analysis was done using Modified diffraction model (MDM) [2] allowing determining radii of excited states. Radii of the states with excitation energies less than ∼ 7 MeV coincide with the radius of the ground state with an accuracy not less than 0.1 - 0.15 fm. This result is consistent with traditional view on shell structure of low-lying states in 11B. Most of the observed high-energy excited states are distributed among four rotational bands. Moments of inertia of band states are close to the moment of inertia of the Hoyle state of 12C. The calculated radii, related to these bands, are 0.7 - 1.0 fm larger than the radius of the ground state, and are close to the Hoyle state radius. These results are in agreement with existing predictions about various cluster structure of 11B at high excitation energies.peerReviewe

Elastic scattering of 9Be+51V near the Coulomb barrier

Elastic scattering angular distributions for the 9Be+51V system were measured at three near Coulomb barrier energies, Elab = 16.35, 17.44 and 18.53 MeV. The data were analyzed by using a Semimicroscopic Optical Model. This combines a microscopic calculation of the mean-field double folding potential and a phenomenological construction of the dynamical polarization potential. The calculations reproduced the data very well and the total reaction cross sections were also calculated

Breakup of

Calculations of breakup and direct proton transfer for the 8B+58Ni system at energies around the Coulomb barrier (EB,lab=22.95 MeV) were performed by the continuum-discretized coupled channels (CDCC) method and the coupled-reaction-channels (CRC) method, respectively. For the 7Be+58Ni interaction, we used a semimicroscopic optical model potential (OMP) that combines microscopic calculations of the mean-field double folding potential and a phenomenological construction of the dynamical polarization potential (DPP). The 7Be angular distribution at Elab=25.75 MeV from the 8B breakup on 58Ni was calculated and the spectroscopic factor for 8B → 7Be+p vertex, Sexpt = 1.10 ± 0.05, was deduced. The astrophysical S17(0) factor was calculated equal to 20.7 ±1.1 eV•b, being in good agreement with the previously reported values