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71.
L. I. Galanina N. S. Zelenskaya V. M. Lebedev N. V. Orlova A. V. Spassky 《Bulletin of the Russian Academy of Sciences: Physics》2013,77(7):920-929
An important property—the dynamic deformation of B* light aligned nuclei—is investigated for the nuclear reactions A(x, y)B* → γ + B 0 by measuring the y-γ correlations. Dynamic deformation is determined from the orientation tensors of multipolar moments. Normalization constants of the contributions from even-rank orientation tensors are determined from the condition of coincidence between dynamic and static deformations of the B* nucleus for θ y = 0°. Experimental dynamic deformations of 12C(2+) nuclei caused by the inelastic scattering of α particles and deuterons are determined, along with the 10Be(2+) nuclei formed in reaction 9Be(d, p)10Be(2+). It is shown that the dynamic deformation of the aligned nuclei depends on how they are formed and their structure, and evolves substantially when the angle θ y is varied. 相似文献
72.
L. I. Galanina N. S. Zelenskaya I. A. Konyukhova V. M. Lebedev N. V. Orlova A. V. Spassky 《Physics of Atomic Nuclei》2013,76(11):1415-1422
The double-differential cross sections for the reaction 24Mg(d, dγ 1.369)24Mg at the projectiledeuteron energy of E d = 15.3 MeV weremeasured for deuteron emission angles in the forward hemisphere. All even spin-tensor components of the density matrix for the 2+ state of the 24Mg nucleus at 1.369 MeV were reconstructed, and its orientation properties were determined. These experimental results were compared with the results of calculations based on various versions of the coupled-channel method. 相似文献
73.
L. I. Galanina N. S. Zelenskaya V. M. Lebedev N. V. Orlova A. V. Spassky 《Bulletin of the Russian Academy of Sciences: Physics》2017,81(6):702-709
All even components of the spin-tensors of a density matrix reconstructed by means of angular correlation for 12С nuclei in the 2+ state (4.44 MeV), produced during the inelastic scattering of α particles with energies of 16 to 25 MeV in scattering angle range θα(lab) = 20°–90°, are presented. The energy dependences of its orientation characteristics (i.e., the population of magnetic substates and the orientation tensors of multipole moments) are determined. Experimental results are compared to calculations using the coupledchannel method and the compound nucleus model. 相似文献
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77.
L. I. Galanina N. S. Zelenskaya A. V. Ignatenko V. M. Lebedev N. V. Orlova O. I. Serikov A. V. Spassky 《Physics of Atomic Nuclei》2005,68(12):1957-1967
The results are presented that were obtained by measuring the differential cross sections for the reaction 10B(d, p)11B occurring at E d = 15.3 MeV and leading to the production of a 11B nucleus in the ground state (3/2?) and in the lowest two excited states (the 1/2? state at 2.125 MeV and the 5/2? state at 4.445 MeV). The energy dependence of the differential cross section for this reaction was measured for several proton emission angles in the energy range E d = 12–15.3 MeV. The double-differential cross sections for the reaction 10B(d, pγ)11B were measured for the 5/2? state of the 11B nucleus at 4.445 MeV, and the angular dependences of the even spin-tensor components of the density matrix were reconstructed on the basis of these data. The angular dependences of the populations of magnetic sublevels are also given. The experimental results in question are compared with their theoretical counterparts obtained under the assumption of various reaction mechanisms (neutron stripping, heavy-particle stripping, and a two-step mechanism that takes into account the delay of interaction). On the basis of this comparison, the deformation parameters of the boron nuclei were found to be β 2(10B) = ?0.55 and β 2(11B) = 0.4. 相似文献
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On the basis of the shell model with an extended basis, the structure of 9Li-9Be to 11Li-11Be nuclei is examined with allowance for the competition of jj coupling and Majorana exchange forces via considering the sequential addition of neutrons, and the respective wave functions are determined. A formalism for calculating the spectroscopic factor for a dineutron and for individual neutrons in nuclei whose wave functions incorporate the mixing of shell configurations is developed. The reactions 9Li(t, p)11Li and 9Be(t, p)11Be treated with allowance for the mechanisms of dineutron stripping and a sequential transfer of two neutrons are considered as an indicator of the proposed structure of lithium and berylliumisotopes. The parameters of the optical potentials, the wave functions for the bound states of transferred particles, and the interaction potentials corresponding to them are determined from a comparison of the theoretical angular distribution of protons from the reaction 9Be(t, p)11Be with its experimental counterpart. It is shown that a dineutron periphery of size about 6.4 fm is present in the 11Li nucleus and that a single-neutron periphery of size about 8 fm is present in the 11Be nucleus. 相似文献